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As part of molecular recognition studies on the phytohormone indole-3-acetic acid (IAA) a series of alkylated IAAs has been examined. Phenyl-ring substitution (alkyl = methyl and ethyl) at positions 4-, 6- or 7- as well as pyrrole substitution at the 2- site resulted in the six compounds which are analyzed: 2-Me-IAA, 4-Me-IAA, 6-Me-IAA, 7-Me-IAA, 4-Et-IAA and 6-Et-IAA. The structure-activity relationships investigated include those between the geometrical parameters of the molecular structures determined by X-ray analysis, the growth-promoting activities in the Avena coleoptile straight-growth bioassay and relative lipophilicities calculated from retention times on a reversed-phase HPLC column and from RF values in reversed-phase TLC. Lipophilicities are correlated with the moments of inertia, average polarizability, molecular mass, and the van der Waals radii of the ring substituents. The influence of substitution on the electronic properties of the indole ring and its geometry is discussed on the basis of the UV and 1H NMR spectra.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S0108768199006199/ha0181sup1.cif
Contains datablocks global, 2-Me-IAA, 4-Me-IAA, 6-Me-IAA, 7-Me-IAA, 4-Et-IAA, 6-Et-IAA, iaalt

sft

Structure factor file (SHELXL table format) https://doi.org/10.1107/S0108768199006199/ha01812-Me-IAAsup2.sft
Supplementary material

sft

Structure factor file (SHELXL table format) https://doi.org/10.1107/S0108768199006199/ha01814-Et-IAAsup3.sft
Supplementary material

sft

Structure factor file (SHELXL table format) https://doi.org/10.1107/S0108768199006199/ha01814-Me-IAAsup4.sft
Supplementary material

sft

Structure factor file (SHELXL table format) https://doi.org/10.1107/S0108768199006199/ha01816-Et-IAAsup5.sft
Supplementary material

sft

Structure factor file (SHELXL table format) https://doi.org/10.1107/S0108768199006199/ha01816-Me-IAAsup6.sft
Supplementary material

sft

Structure factor file (SHELXL table format) https://doi.org/10.1107/S0108768199006199/ha01817-Me-IAAsup7.sft
Supplementary material

CCDC references: 141651; 141652; 141653; 141654; 141655; 141656; 141657

Computing details top

For all compounds, data collection: CAD4 (Enraf Nonius 1988) software; cell refinement: CAD4 (Enraf Nonius 1988) software <CELDIM> routine; data reduction: SDP (Frenz, 1982). Program(s) used to solve structure: SHELXS86 (Sheldrick,1985, 1990) for 2-Me-IAA, 4-Me-IAA, 6-Me-IAA, 7-Me-IAA, 4-Et-IAA, 6-Et-IAA; SHELX86 (Sheldrick,1985) for iaalt. For all compounds, program(s) used to refine structure: SHELX76 (Sheldrick, 1976); molecular graphics: PLATON93 (Spek, 1982, 1990) & ORTEP (Johnson, 1965), PLUTON93 (Spek 1991); software used to prepare material for publication: PLATON93 (Spek 1982, 1990).

(2-Me-IAA) 2-methyl-idole-3-acetic acid top
Crystal data top
C11H11NO2F(000) = 400
Mr = 189.21Dx = 1.289 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
a = 8.542 (1) ÅCell parameters from 25 reflections
b = 13.408 (1) Åθ = 7–18°
c = 8.638 (1) ŵ = 0.09 mm1
β = 99.70 (1)°T = 297 K
V = 975.18 (8) Å3Prismatic, colourless
Z = 40.40 × 0.15 × 0.15 mm
Data collection top
Enraf-Nonius CAD4
diffractometer
Rint = 0.013
Radiation source: fine-focus sealed tubeθmax = 25°, θmin = 2°
Graphite monochromatorh = 010
ω/2θ scansk = 015
1920 measured reflectionsl = 1010
1467 independent reflections3 standard reflections every 87 reflections
1052 reflections with I > 3σ(I) intensity decay: 0.3%
Refinement top
Refinement on FPrimary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.039Hydrogen site location: difference Fourier map
wR(F2) = 0.043All H-atom parameters refined except Uiso for H101, H102, H103
1052 reflectionsCalculated w = 1.4784/[σ2(Fo) + 0.001075(Fo2)]
168 parameters(Δ/σ)max = 0.05
0 restraintsΔρmax = 0.17 e Å3
0 constraintsΔρmin = 0.18 e Å3
Special details top

Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All e.s.d.'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.9544 (2)0.0794 (1)0.8285 (2)0.0583 (6)
O20.8698 (2)0.0681 (1)0.8907 (2)0.0692 (7)
N10.5467 (3)0.2278 (2)0.5059 (2)0.0568 (7)
C20.6732 (3)0.1639 (2)0.5051 (2)0.0502 (8)
C30.6586 (3)0.0868 (2)0.6046 (2)0.0468 (7)
C40.4384 (4)0.0496 (2)0.7716 (3)0.0617 (10)
C50.2965 (4)0.0862 (3)0.8023 (4)0.0774 (13)
C60.2313 (4)0.1739 (3)0.7354 (4)0.0779 (13)
C70.3063 (3)0.2276 (2)0.6360 (3)0.0667 (10)
C80.7676 (4)0.0000 (2)0.6379 (3)0.0569 (9)
C90.8678 (3)0.0001 (2)0.7971 (3)0.0446 (7)
C100.7939 (4)0.1848 (2)0.4057 (4)0.0760 (11)
C310.5171 (3)0.1024 (2)0.6679 (2)0.0483 (7)
C710.4486 (3)0.1914 (2)0.6023 (2)0.0504 (8)
H10.531 (3)0.282 (2)0.443 (3)0.078 (9)*
H40.485 (3)0.015 (2)0.816 (3)0.079 (9)*
H50.249 (4)0.052 (2)0.871 (3)0.083 (10)*
H60.125 (4)0.197 (2)0.762 (4)0.103 (11)*
H70.260 (4)0.291 (2)0.590 (4)0.095 (10)*
H111.017 (4)0.075 (2)0.938 (4)0.097 (10)*
H810.847 (3)0.0034 (19)0.567 (3)0.069 (8)*
H820.714 (3)0.062 (2)0.632 (3)0.081 (9)*
H1010.870 (5)0.132 (3)0.401 (5)0.1500*
H1020.750 (5)0.190 (3)0.295 (6)0.1500*
H1030.854 (5)0.234 (4)0.430 (6)0.1500*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0610 (11)0.0482 (10)0.0593 (11)0.0132 (8)0.0083 (9)0.0045 (7)
O20.0845 (13)0.0579 (11)0.0543 (10)0.0241 (9)0.0194 (9)0.0124 (8)
N10.0704 (14)0.0503 (12)0.0469 (11)0.0153 (11)0.0021 (11)0.0074 (10)
C20.0584 (15)0.0511 (13)0.0382 (12)0.0034 (12)0.0000 (11)0.0028 (10)
C30.0556 (15)0.0450 (12)0.0351 (11)0.0046 (10)0.0060 (11)0.0049 (9)
C40.0748 (19)0.0615 (17)0.0470 (15)0.0136 (15)0.0048 (14)0.0031 (12)
C50.075 (2)0.104 (3)0.0560 (17)0.029 (2)0.0191 (16)0.0158 (17)
C60.0612 (19)0.108 (3)0.0606 (18)0.0063 (19)0.0013 (16)0.0189 (18)
C70.0662 (18)0.083 (2)0.0468 (15)0.0159 (16)0.0021 (14)0.0108 (14)
C80.0688 (18)0.0523 (15)0.0445 (14)0.0123 (14)0.0049 (13)0.0056 (12)
C90.0464 (13)0.0396 (11)0.0462 (12)0.0017 (10)0.0032 (10)0.0008 (10)
C100.084 (2)0.075 (2)0.0733 (19)0.0008 (16)0.0258 (18)0.0059 (16)
C310.0557 (14)0.0498 (13)0.0346 (11)0.0009 (11)0.0063 (10)0.006 (1)
C710.0536 (15)0.0603 (15)0.0338 (11)0.0075 (12)0.0029 (11)0.0059 (10)
Geometric parameters (Å, º) top
O1—C91.300 (3)C8—C91.492 (4)
O2—C91.217 (3)C31—C711.406 (4)
N1—C21.380 (4)O1—H111.01 (3)
N1—C711.367 (3)N1—H10.90 (3)
C2—C31.363 (3)C4—H41.00 (3)
C2—C101.475 (4)C5—H50.90 (3)
C3—C81.488 (4)C6—H61.02 (3)
C3—C311.424 (4)C7—H70.99 (3)
C4—C51.374 (5)C8—H810.99 (3)
C4—C311.399 (4)C8—H820.95 (3)
C5—C61.385 (5)C10—H1010.97 (4)
C6—C71.361 (4)C10—H1020.97 (5)
C7—C711.385 (4)C10—H1030.84 (5)
C2—N1—C71110.0 (2)C2—N1—H1122.2 (17)
N1—C2—C3108.2 (2)C71—N1—H1127.5 (17)
N1—C2—C10120.6 (2)C5—C4—H4122.8 (15)
C3—C2—C10131.1 (2)C31—C4—H4118.7 (15)
C2—C3—C8126.5 (2)C4—C5—H5117 (2)
C2—C3—C31107.7 (2)C6—C5—H5121 (2)
C8—C3—C31125.8 (2)C5—C6—H6118.3 (17)
C5—C4—C31118.5 (3)C7—C6—H6120.8 (17)
C4—C5—C6121.9 (3)C6—C7—H7121 (2)
C5—C6—C7120.9 (3)C71—C7—H7121 (2)
C6—C7—C71118.1 (3)C3—C8—H81112.9 (15)
C3—C8—C9114.9 (2)C3—C8—H82113.3 (16)
O1—C9—O2122.1 (2)C9—C8—H81102.9 (15)
O1—C9—C8114.2 (2)C9—C8—H82104.3 (16)
O2—C9—C8123.7 (2)H81—C8—H82108 (2)
C3—C31—C4134.6 (3)C2—C10—H101115 (3)
C3—C31—C71107.0 (2)C2—C10—H102113 (3)
C4—C31—C71118.4 (2)C2—C10—H103117 (3)
N1—C71—C7130.8 (2)H101—C10—H10299 (4)
N1—C71—C31107.0 (2)H101—C10—H103101 (4)
C7—C71—C31122.2 (2)H102—C10—H103108 (4)
C9—O1—H11110.0 (16)
C71—N1—C2—C31.4 (3)C31—C4—C5—C60.9 (5)
C71—N1—C2—C10178.0 (2)C5—C4—C31—C3177.3 (3)
C2—N1—C71—C7177.7 (2)C5—C4—C31—C711.2 (4)
C2—N1—C71—C311.4 (3)C4—C5—C6—C70.1 (7)
N1—C2—C3—C8179.1 (2)C5—C6—C7—C710.8 (5)
N1—C2—C3—C310.8 (3)C6—C7—C71—N1178.5 (3)
C10—C2—C3—C80.2 (4)C6—C7—C71—C310.4 (4)
C10—C2—C3—C31178.5 (3)C3—C8—C9—O1175.5 (2)
C2—C3—C8—C9108.5 (3)C3—C8—C9—O24.5 (4)
C31—C3—C8—C973.6 (3)C3—C31—C71—N10.8 (2)
C2—C3—C31—C4178.6 (3)C3—C31—C71—C7178.4 (2)
C2—C3—C31—C710.0 (9)C4—C31—C71—N1179.7 (2)
C8—C3—C31—C40.4 (4)C4—C31—C71—C70.5 (3)
C8—C3—C31—C71178.2 (2)
(4-Me-IAA) 4-methyl-indole-3-acetic acid top
Crystal data top
C11H11NO2F(000) = 400
Mr = 189.21Dx = 1.290 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71073 Å
a = 8.680 (1) ÅCell parameters from 25 reflections
b = 7.624 (1) Åθ = 6–18°
c = 15.044 (1) ŵ = 0.09 mm1
β = 101.870 (6)°T = 103 K
V = 974.27 (8) Å3Prismatic, colourless
Z = 40.50 × 0.25 × 0.20 mm
Data collection top
Enraf-Nonius CAD4
diffractometer
Rint = 0.040
Radiation source: fine-focus sealed tubeθmax = 25°, θmin = 2°
Graphite monochromatorh = 010
ω/2θ scansk = 09
1974 measured reflectionsl = 1717
1619 independent reflections3 standard reflections every 87 reflections
1434 reflections with I > 3σ(I) intensity decay: 0.5%
Refinement top
Refinement on FPrimary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.035Hydrogen site location: difference Fourier map
wR(F2) = 0.041All H-atom parameters refined except H1, H11 normalized
1434 reflectionsCalculated w = 1.4555/[σ2(Fo) + 0.001021(Fo2)]
172 parameters(Δ/σ)max = 0.005
0 restraintsΔρmax = 0.23 e Å3
0 constraintsΔρmin = 0.24 e Å3
Special details top

Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All e.s.d.'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.5521 (1)0.2131 (1)1.0514 (1)0.0212 (3)
O20.5873 (1)0.0922 (1)0.9217 (1)0.0189 (3)
N10.8154 (1)0.4957 (2)0.7507 (1)0.0235 (4)
C20.6982 (2)0.4966 (2)0.7990 (1)0.0241 (5)
C30.7464 (2)0.4108 (2)0.8795 (1)0.0201 (4)
C41.0201 (2)0.2654 (2)0.9475 (1)0.0233 (4)
C51.1639 (2)0.2323 (2)0.9242 (1)0.0292 (5)
C61.1989 (2)0.2872 (2)0.8416 (1)0.0286 (5)
C71.0911 (2)0.3783 (2)0.7789 (1)0.0228 (4)
C80.6513 (2)0.3986 (2)0.9518 (1)0.0257 (5)
C90.5967 (2)0.2191 (2)0.9725 (1)0.0170 (4)
C100.9912 (2)0.2127 (2)1.0392 (1)0.0310 (5)
C310.9056 (2)0.3534 (2)0.8825 (1)0.0180 (4)
C710.9440 (2)0.4098 (2)0.8000 (1)0.0187 (4)
H10.813 (2)0.550 (3)0.6991 (13)0.039 (5)*
H20.599 (2)0.550 (2)0.7756 (11)0.023 (4)*
H51.245 (2)0.178 (3)0.9682 (12)0.035 (5)*
H61.303 (2)0.256 (2)0.8280 (11)0.031 (4)*
H71.1154 (18)0.417 (2)0.7205 (10)0.023 (4)*
H110.511 (2)0.112 (3)1.0600 (13)0.044 (6)*
H810.549 (2)0.463 (3)0.9334 (12)0.041 (5)*
H820.711 (2)0.449 (3)1.0108 (12)0.035 (5)*
H1010.9035 (19)0.128 (2)1.0325 (11)0.026 (4)*
H1021.085 (2)0.164 (3)1.0746 (13)0.045 (5)*
H1030.953 (2)0.315 (3)1.0717 (12)0.041 (5)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0347 (6)0.0160 (5)0.0172 (5)0.0044 (4)0.0150 (4)0.0016 (4)
O20.0280 (5)0.0147 (5)0.0167 (5)0.0013 (4)0.0107 (4)0.0015 (4)
N10.0289 (7)0.0256 (7)0.0185 (6)0.0015 (5)0.0105 (5)0.0071 (5)
C20.0274 (8)0.0205 (8)0.0273 (8)0.0029 (6)0.0126 (6)0.0059 (6)
C30.0319 (8)0.0119 (7)0.0202 (7)0.0023 (6)0.0142 (6)0.0006 (5)
C40.0318 (8)0.0155 (7)0.0203 (7)0.0090 (6)0.0003 (6)0.0002 (6)
C50.0267 (8)0.0221 (8)0.0344 (9)0.0057 (6)0.0040 (7)0.0064 (7)
C60.0233 (8)0.0235 (8)0.0392 (9)0.0030 (6)0.0072 (7)0.0021 (7)
C70.0266 (8)0.0226 (7)0.0214 (7)0.0054 (6)0.0104 (6)0.0049 (6)
C80.0419 (9)0.0150 (7)0.0268 (8)0.0008 (6)0.0227 (7)0.0013 (6)
C90.0212 (7)0.0170 (7)0.0150 (6)0.0018 (5)0.0087 (5)0.0007 (5)
C100.0427 (10)0.0254 (9)0.0214 (8)0.0114 (8)0.0013 (7)0.0059 (7)
C310.0300 (8)0.0098 (7)0.0157 (6)0.0046 (6)0.0079 (5)0.0028 (5)
C710.0258 (8)0.0148 (7)0.0164 (7)0.0029 (6)0.0062 (5)0.0012 (5)
Geometric parameters (Å, º) top
O1—C91.323 (2)C8—C91.502 (2)
O2—C91.2252 (19)C31—C711.417 (2)
N1—C21.366 (2)O1—H110.87 (2)
N1—C711.373 (2)N1—H10.88 (2)
C2—C31.364 (2)C2—H20.952 (17)
C3—C81.497 (2)C5—H50.956 (19)
C3—C311.441 (2)C6—H60.995 (18)
C4—C51.387 (2)C7—H70.990 (15)
C4—C101.507 (2)C8—H811.003 (19)
C4—C311.412 (2)C8—H821.007 (19)
C5—C61.402 (2)C10—H1010.987 (16)
C6—C71.373 (2)C10—H1020.952 (19)
C7—C711.398 (2)C10—H1031.01 (2)
C2—N1—C71109.07 (14)C2—N1—H1125.7 (12)
N1—C2—C3110.10 (15)C71—N1—H1124.9 (12)
C2—C3—C8124.08 (15)N1—C2—H2121.4 (10)
C2—C3—C31106.88 (14)C3—C2—H2128.5 (10)
C8—C3—C31128.80 (14)C4—C5—H5118.5 (11)
C5—C4—C10120.72 (14)C6—C5—H5118.7 (11)
C5—C4—C31116.94 (14)C5—C6—H6118.8 (9)
C10—C4—C31122.33 (15)C7—C6—H6119.9 (9)
C4—C5—C6122.66 (15)C6—C7—H7121.4 (9)
C5—C6—C7121.23 (16)C71—C7—H7121.4 (9)
C6—C7—C71117.13 (14)C3—C8—H81111 (1)
C3—C8—C9116.86 (13)C3—C8—H82110.8 (10)
O1—C9—O2122.56 (14)C9—C8—H81101.8 (12)
O1—C9—C8112.38 (12)C9—C8—H82107.0 (12)
O2—C9—C8125.00 (14)H81—C8—H82108.8 (16)
C3—C31—C4134.39 (15)C4—C10—H101110.5 (10)
C3—C31—C71106.10 (13)C4—C10—H102109.4 (11)
C4—C31—C71119.47 (16)C4—C10—H103111.7 (11)
N1—C71—C7129.66 (14)H101—C10—H102110.8 (16)
N1—C71—C31107.85 (14)H101—C10—H103103.4 (14)
C7—C71—C31122.49 (15)H102—C10—H103111.0 (16)
C9—O1—H11111.6 (13)
C71—N1—C2—C30.6 (2)C5—C4—C31—C712.8 (2)
C2—N1—C71—C7179.15 (15)C10—C4—C31—C31.6 (3)
C2—N1—C71—C310.4 (2)C10—C4—C31—C71175.75 (14)
N1—C2—C3—C8175.38 (14)C4—C5—C6—C70.2 (2)
N1—C2—C3—C310.60 (18)C5—C6—C7—C711.6 (2)
C2—C3—C8—C9115.29 (18)C6—C7—C71—N1179.79 (15)
C31—C3—C8—C971.1 (2)C6—C7—C71—C310.7 (2)
C2—C3—C31—C4177.28 (17)C3—C8—C9—O1162.95 (14)
C2—C3—C31—C710.36 (17)C3—C8—C9—O219.9 (2)
C8—C3—C31—C42.8 (3)C3—C31—C71—N10.0 (4)
C8—C3—C31—C71174.81 (15)C3—C31—C71—C7179.56 (14)
C10—C4—C5—C6176.55 (14)C4—C31—C71—N1178.07 (14)
C31—C4—C5—C62.0 (2)C4—C31—C71—C71.5 (2)
C5—C4—C31—C3179.82 (18)
(6-Me-IAA) 6-Methyl-indole-3-acetic acid top
Crystal data top
C11H11NO2F(000) = 800
Mr = 189.21Dx = 1.304 Mg m3
Orthorhombic, PbcaMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2abCell parameters from 25 reflections
a = 6.216 (1) Åθ = 6–17°
b = 38.627 (1) ŵ = 0.09 mm1
c = 8.031 (1) ÅT = 297 K
V = 1928.29 (18) Å3Prismatic, colourless
Z = 80.50 × 0.40 × 0.40 mm
Data collection top
Enraf-Nonius CAD4
diffractometer
Rint = 0.050
Radiation source: fine-focus sealed tubeθmax = 25°, θmin = 2°
Graphite monochromatorh = 07
ω/2θ scansk = 046
2040 measured reflectionsl = 09
1398 independent reflections3 standard reflections every 87 reflections
970 reflections with I > 3σ(I) intensity decay: 1.8%
Refinement top
Refinement on F3 constraints
Least-squares matrix: fullAll H-atom parameters refined, except H101, H102, H103 parameters constrained, H1 normalized, H81, H82 riding
R[F2 > 2σ(F2)] = 0.049Calculated w = 3.7308/[σ2(Fo) + 0.000000(Fo2)]
wR(F2) = 0.041(Δ/σ)max = 0.05
970 reflectionsΔρmax = 0.16 e Å3
158 parametersΔρmin = 0.19 e Å3
0 restraints
Special details top

Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All e.s.d.'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.0216 (5)0.5280 (1)1.1766 (3)0.0625 (11)
O20.1625 (4)0.5298 (1)0.9238 (3)0.0650 (11)
N10.7320 (6)0.5899 (1)0.8783 (4)0.0530 (14)
C20.5665 (6)0.5693 (1)0.9324 (4)0.0423 (12)
C30.4239 (5)0.5887 (1)1.0198 (4)0.0366 (11)
C40.4350 (7)0.6546 (1)1.0885 (5)0.0510 (16)
C50.5540 (7)0.6840 (1)1.0622 (5)0.0607 (17)
C60.7456 (7)0.6836 (1)0.9691 (5)0.0623 (17)
C70.8196 (7)0.6530 (1)0.9022 (5)0.0560 (16)
C80.2243 (5)0.5776 (1)1.1089 (4)0.0423 (12)
C90.1367 (6)0.5429 (1)1.0610 (5)0.0453 (12)
C100.8722 (8)0.7168 (1)0.9436 (6)0.094 (2)
C310.5057 (5)0.6232 (1)1.0204 (4)0.0394 (11)
C710.6987 (5)0.6234 (1)0.9290 (4)0.0426 (14)
H10.806 (6)0.5835 (8)0.812 (4)0.050 (14)*
H20.560 (5)0.5446 (9)0.907 (3)0.041 (10)*
H40.305 (5)0.6558 (7)1.148 (3)0.033 (9)*
H50.498 (5)0.7083 (8)1.111 (3)0.054 (10)*
H70.950 (6)0.6495 (9)0.839 (4)0.074 (13)*
H110.058 (7)0.5037 (12)1.141 (5)0.115 (16)*
H810.1012 (5)0.5967 (1)1.0851 (4)0.096 (14)*
H820.2598 (5)0.5770 (1)1.2405 (4)0.082 (12)*
H1010.8020 (8)0.7376 (1)1.0151 (6)0.1500*
H1020.8720 (8)0.7237 (1)0.8132 (6)0.1500*
H1031.0356 (8)0.7126 (1)0.9844 (6)0.1500*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.075 (2)0.0618 (19)0.0507 (16)0.0250 (17)0.0161 (15)0.0061 (13)
O20.085 (2)0.0646 (19)0.0455 (16)0.0251 (16)0.0119 (16)0.0136 (14)
N10.045 (2)0.068 (3)0.046 (2)0.006 (2)0.0124 (19)0.0100 (19)
C20.044 (2)0.045 (2)0.038 (2)0.004 (2)0.0024 (19)0.004 (2)
C30.0353 (19)0.043 (2)0.0316 (18)0.0003 (19)0.0045 (17)0.0011 (17)
C40.041 (2)0.056 (3)0.056 (3)0.004 (2)0.008 (2)0.003 (2)
C50.058 (3)0.051 (3)0.073 (3)0.004 (2)0.007 (3)0.002 (2)
C60.058 (3)0.061 (3)0.068 (3)0.010 (2)0.002 (3)0.010 (2)
C70.043 (2)0.073 (3)0.052 (3)0.005 (2)0.007 (2)0.005 (2)
C80.039 (2)0.044 (2)0.044 (2)0.0011 (18)0.0016 (18)0.0042 (17)
C90.042 (2)0.049 (2)0.045 (2)0.0017 (19)0.004 (2)0.004 (2)
C100.088 (4)0.074 (3)0.119 (4)0.030 (3)0.012 (3)0.011 (3)
C310.0346 (19)0.049 (2)0.0345 (19)0.0053 (17)0.0002 (18)0.0033 (17)
C710.039 (2)0.053 (3)0.0359 (19)0.001 (2)0.0004 (19)0.0030 (19)
Geometric parameters (Å, º) top
O1—C91.306 (5)C8—C91.497 (5)
O2—C91.223 (5)C31—C711.406 (4)
N1—C21.371 (5)O1—H111.10 (5)
N1—C711.372 (5)N1—H10.75 (3)
C2—C31.356 (5)C2—H20.98 (3)
C3—C81.495 (5)C4—H40.94 (3)
C3—C311.426 (5)C5—H51.08 (3)
C4—C51.372 (6)C7—H70.97 (4)
C4—C311.401 (5)C8—H811.080 (5)
C5—C61.406 (6)C8—H821.080 (5)
C6—C71.377 (6)C10—H1011.080 (6)
C6—C101.518 (6)C10—H1021.081 (7)
C7—C711.385 (5)C10—H1031.079 (7)
C2—N1—C71109.9 (3)C2—N1—H1120 (3)
N1—C2—C3109.5 (3)C71—N1—H1128 (2)
C2—C3—C8129.2 (4)N1—C2—H2122.1 (18)
C2—C3—C31106.6 (3)C3—C2—H2128.4 (18)
C8—C3—C31124.2 (3)C5—C4—H4120.1 (17)
C5—C4—C31119.2 (4)C31—C4—H4120.7 (17)
C4—C5—C6122.0 (4)C4—C5—H5119.5 (16)
C5—C6—C7120.0 (4)C6—C5—H5118.5 (16)
C5—C6—C10120.1 (4)C6—C7—H7127 (2)
C7—C6—C10119.9 (4)C71—C7—H7115 (2)
C6—C7—C71117.8 (4)C3—C8—H81107.9 (4)
C3—C8—C9115.8 (3)C3—C8—H82107.8 (3)
O1—C9—O2122.0 (4)C9—C8—H81108.0 (3)
O1—C9—C8114.3 (3)C9—C8—H82107.9 (4)
O2—C9—C8123.7 (4)H81—C8—H82109.4 (4)
C3—C31—C4134.3 (3)C6—C10—H101110.3 (5)
C3—C31—C71107.9 (3)C6—C10—H102109.8 (4)
C4—C31—C71117.8 (3)C6—C10—H103108.6 (4)
N1—C71—C7130.6 (3)H101—C10—H102109.4 (5)
N1—C71—C31106.2 (3)H101—C10—H103109.3 (5)
C7—C71—C31123.3 (4)H102—C10—H103109.4 (6)
C9—O1—H11116 (2)
C71—N1—C2—C30.5 (4)C5—C4—C31—C710.7 (5)
C2—N1—C71—C7179.0 (4)C4—C5—C6—C70.5 (6)
C2—N1—C71—C310.9 (4)C4—C5—C6—C10179.9 (4)
N1—C2—C3—C8177.1 (3)C5—C6—C7—C710.5 (6)
N1—C2—C3—C310.2 (4)C10—C6—C7—C71179.9 (5)
C2—C3—C8—C917.7 (5)C6—C7—C71—N1179.9 (5)
C31—C3—C8—C9166.0 (3)C6—C7—C71—C310.0 (11)
C2—C3—C31—C4179.8 (5)C3—C8—C9—O1154.8 (3)
C2—C3—C31—C710.7 (4)C3—C8—C9—O227.8 (5)
C8—C3—C31—C42.7 (6)C3—C31—C71—N11.0 (4)
C8—C3—C31—C71177.8 (3)C3—C31—C71—C7178.9 (3)
C31—C4—C5—C60.2 (7)C4—C31—C71—N1179.4 (3)
C5—C4—C31—C3178.8 (4)C4—C31—C71—C70.7 (5)
(7-Me-IAA) 7-Methyl-indole-3-acetic acid top
Crystal data top
C11H11NO2F(000) = 400
Mr = 189.21Dx = 1.317 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
a = 19.353 (1) ÅCell parameters from 25 reflections
b = 5.074 (1) Åθ = 6–17°
c = 10.275 (1) ŵ = 0.09 mm1
β = 109.000 (6)°T = 297 K
V = 954.00 (9) Å3Prismatic, colorless
Z = 40.40 × 0.30 × 0.10 mm
Data collection top
Enraf-Nonius CAD4
diffractometer
Rint = 0.013
Radiation source: fine-focus sealed tubeθmax = 25°, θmin = 2°
Graphite monochromatorh = 2221
ω/2θ scansk = 06
1988 measured reflectionsl = 012
1461 independent reflections3 standard reflections every 87 reflections
1038 reflections with I > 3σ(I) intensity decay: 0.1%
Refinement top
Refinement on FPrimary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.041Hydrogen site location: difference Fourier map
wR(F2) = 0.036Refall, except H1, H11 normalized
1038 reflectionsCalculated w = 2.6240/[σ2(Fo) + 0.000000(Fo2)]
172 parameters(Δ/σ)max = 0.05
0 restraintsΔρmax = 0.14 e Å3
0 constraintsΔρmin = 0.15 e Å3
Special details top

Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All e.s.d.'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.0107 (1)0.7574 (4)0.3874 (2)0.0811 (6)
O20.0766 (1)0.4041 (4)0.4752 (2)0.0743 (6)
N10.2671 (1)0.2538 (4)0.3218 (2)0.0542 (6)
C20.1960 (1)0.3372 (5)0.2674 (3)0.0565 (7)
C30.1828 (1)0.5300 (5)0.3466 (3)0.0508 (6)
C40.2704 (1)0.7386 (5)0.5714 (3)0.0616 (7)
C50.3411 (1)0.7287 (6)0.6591 (3)0.0680 (7)
C60.3916 (1)0.5545 (5)0.6355 (3)0.0637 (7)
C70.3736 (1)0.3841 (5)0.5252 (2)0.0500 (6)
C80.1134 (1)0.6829 (5)0.3196 (3)0.0629 (7)
C90.0662 (1)0.5992 (5)0.4035 (3)0.0552 (7)
C100.4284 (2)0.2032 (6)0.4975 (3)0.0720 (7)
C310.2490 (1)0.5697 (5)0.4581 (2)0.0467 (6)
C710.3014 (1)0.3938 (5)0.4391 (2)0.0452 (6)
H10.2890 (9)0.1306 (15)0.2899 (13)0.0578 (16)*
H20.1641 (8)0.2645 (15)0.1797 (13)0.0567 (16)*
H40.2357 (8)0.8717 (15)0.5833 (13)0.0566 (16)*
H50.3579 (9)0.8613 (15)0.7394 (13)0.0648 (16)*
H60.4425 (9)0.5556 (15)0.6959 (13)0.0578 (16)*
H110.0165 (9)0.6858 (15)0.4279 (13)0.0677 (16)*
H810.1225 (9)0.8800 (15)0.3356 (13)0.0641 (16)*
H820.0810 (9)0.6662 (15)0.2215 (13)0.0571 (16)*
H1010.4362 (9)0.2409 (15)0.4103 (13)0.0625 (16)*
H1020.4088 (9)0.0325 (15)0.4775 (13)0.0647 (16)*
H1030.4772 (8)0.2306 (15)0.5713 (13)0.0681 (16)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0686 (9)0.0768 (10)0.1205 (11)0.0191 (9)0.0617 (9)0.0362 (10)
O20.0600 (9)0.0844 (11)0.0921 (10)0.0192 (9)0.0434 (8)0.0401 (10)
N10.0614 (10)0.0485 (10)0.0613 (10)0.0011 (10)0.0318 (9)0.0057 (10)
C20.0554 (11)0.0601 (12)0.0579 (12)0.0123 (10)0.0238 (10)0.0022 (11)
C30.0505 (10)0.0506 (12)0.0616 (11)0.0027 (10)0.0322 (10)0.0081 (11)
C40.0755 (12)0.0517 (12)0.0749 (12)0.0022 (11)0.0482 (10)0.0052 (11)
C50.0857 (12)0.0649 (12)0.0638 (12)0.0202 (12)0.0387 (11)0.0177 (11)
C60.0615 (11)0.0744 (13)0.0584 (12)0.0098 (11)0.024 (1)0.0032 (12)
C70.0549 (11)0.0514 (11)0.0506 (11)0.0007 (10)0.0265 (10)0.0080 (11)
C80.0552 (11)0.0650 (13)0.0787 (12)0.0017 (11)0.036 (1)0.0179 (12)
C90.0417 (10)0.0624 (12)0.0643 (12)0.0012 (11)0.0212 (10)0.0048 (12)
C100.0644 (12)0.0791 (13)0.0767 (12)0.0117 (12)0.0286 (11)0.0047 (12)
C310.0563 (10)0.0400 (11)0.0560 (11)0.0047 (10)0.0349 (9)0.0001 (10)
C710.0556 (11)0.0392 (11)0.0507 (11)0.0031 (10)0.0308 (9)0.0023 (10)
Geometric parameters (Å, º) top
O1—C91.308 (3)C8—C91.507 (3)
O2—C91.211 (3)C31—C711.411 (3)
N1—C21.373 (3)O1—H110.851 (16)
N1—C711.370 (3)N1—H10.877 (13)
C2—C31.349 (4)C2—H20.983 (13)
C3—C81.497 (3)C4—H40.988 (13)
C3—C311.428 (3)C5—H51.032 (11)
C4—C51.373 (4)C6—H60.979 (16)
C4—C311.395 (4)C8—H811.019 (8)
C5—C61.396 (3)C8—H821.002 (13)
C6—C71.377 (4)C10—H1010.975 (14)
C7—C101.498 (4)C10—H1020.941 (10)
C7—C711.390 (3)C10—H1031.010 (15)
C2—N1—C71109.4 (2)C2—N1—H1127.6 (10)
N1—C2—C3109.8 (2)C71—N1—H1123 (1)
C2—C3—C8126.8 (2)N1—C2—H2120.3 (8)
C2—C3—C31106.8 (2)C3—C2—H2129.7 (8)
C8—C3—C31126.3 (2)C5—C4—H4121.1 (8)
C5—C4—C31119.1 (2)C31—C4—H4119.6 (8)
C4—C5—C6120.9 (3)C4—C5—H5119.2 (9)
C5—C6—C7122.5 (2)C6—C5—H5119.7 (10)
C6—C7—C10122.4 (2)C5—C6—H6120.2 (7)
C6—C7—C71115.7 (2)C7—C6—H6117.3 (7)
C10—C7—C71121.9 (2)C3—C8—H81112.4 (10)
C3—C8—C9115.0 (2)C3—C8—H82111.9 (9)
O1—C9—O2123.1 (2)C9—C8—H81106.8 (9)
O1—C9—C8112.4 (2)C9—C8—H82104.7 (10)
O2—C9—C8124.5 (2)H81—C8—H82105.3 (9)
C3—C31—C4134.5 (2)C7—C10—H101112.7 (8)
C3—C31—C71107.29 (19)C7—C10—H102110.2 (11)
C4—C31—C71118.18 (19)C7—C10—H103108.6 (7)
N1—C71—C7129.8 (2)H101—C10—H10298.7 (10)
N1—C71—C31106.58 (18)H101—C10—H103106.0 (13)
C7—C71—C31123.6 (2)H102—C10—H103120.2 (10)
C9—O1—H11106.8 (9)
C71—N1—C2—C30.1 (3)C4—C5—C6—C70.4 (4)
C2—N1—C71—C7177.4 (2)C5—C6—C7—C10178.0 (3)
C2—N1—C71—C310.4 (3)C5—C6—C7—C710.7 (4)
N1—C2—C3—C8176.7 (2)C6—C7—C71—N1179.2 (2)
N1—C2—C3—C310.5 (3)C6—C7—C71—C311.8 (3)
C2—C3—C8—C9102.5 (3)C10—C7—C71—N10.4 (4)
C31—C3—C8—C980.8 (3)C10—C7—C71—C31177.0 (2)
C2—C3—C31—C4179.4 (3)C3—C8—C9—O1172.8 (2)
C2—C3—C31—C710.7 (3)C3—C8—C9—O29.2 (4)
C8—C3—C31—C42.1 (4)C3—C31—C71—N10.7 (3)
C8—C3—C31—C71176.5 (2)C3—C31—C71—C7177.3 (2)
C31—C4—C5—C60.6 (4)C4—C31—C71—N1179.6 (2)
C5—C4—C31—C3178.2 (3)C4—C31—C71—C71.6 (4)
C5—C4—C31—C710.3 (4)
(4-Et-IAA) 4-ethyl-indole-3-acetic acid top
Crystal data top
C12H13NO2F(000) = 432
Mr = 203.24Dx = 1.360 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71073 Å
a = 9.288 (1) ÅCell parameters from 25 reflections
b = 7.440 (1) Åθ = 6–18°
c = 14.776 (1) ŵ = 0.09 mm1
β = 103.530 (6)°T = 297 K
V = 992.72 (8) Å3Plate, colourless
Z = 40.45 × 0.20 × 0.06 mm
Data collection top
Enraf-Nonius CAD4
diffractometer
Rint = 0.018
Radiation source: fine-focus sealed tubeθmax = 25°, θmin = 2°
Graphite monochromatorh = 111
ω/2θ scansk = 18
2594 measured reflectionsl = 1717
1526 independent reflections3 standard reflections every 87 reflections
999 reflections with I > 3σ(I) intensity decay: 1.5%
Refinement top
Refinement on FPrimary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.042Hydrogen site location: difference Fourier map
wR(F2) = 0.046All H-atom parameters refined
999 reflectionsCalculated w = 0.8494/[σ2(Fo) + 0.002474(Fo2)]
188 parameters(Δ/σ)max = 0.010
0 restraintsΔρmax = 0.02 e Å3
0 constraintsΔρmin = 0.02 e Å3
Special details top

Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All e.s.d.'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.0901 (3)0.9177 (4)0.0898 (1)0.0447 (8)
O20.1554 (2)0.9165 (3)0.0643 (1)0.0427 (8)
N10.5646 (3)0.7035 (4)0.2082 (2)0.0370 (9)
C20.4349 (4)0.7608 (5)0.1510 (2)0.0338 (10)
C30.4470 (3)0.7643 (4)0.0610 (2)0.0272 (9)
C40.6774 (3)0.6834 (4)0.0070 (2)0.0298 (10)
C50.8228 (4)0.6282 (5)0.0230 (2)0.0384 (11)
C60.8888 (4)0.5939 (5)0.1171 (2)0.0440 (11)
C70.8109 (4)0.6144 (5)0.1843 (2)0.0411 (11)
C80.3287 (3)0.8145 (5)0.0238 (2)0.0297 (10)
C90.1852 (3)0.8867 (4)0.0098 (2)0.0283 (9)
C100.6073 (4)0.7177 (5)0.1083 (2)0.0327 (10)
C110.7026 (5)0.6843 (7)0.1775 (2)0.0465 (14)
C310.5956 (3)0.7070 (4)0.0616 (2)0.0277 (9)
C710.6651 (3)0.6708 (4)0.1556 (2)0.031 (1)
H10.576 (4)0.678 (5)0.270 (3)0.052 (11)*
H20.355 (4)0.786 (4)0.1734 (19)0.027 (8)*
H50.881 (4)0.610 (5)0.020 (2)0.043 (10)*
H60.998 (4)0.561 (5)0.133 (2)0.052 (10)*
H70.858 (4)0.595 (5)0.247 (2)0.049 (10)*
H110.002 (5)0.972 (6)0.078 (3)0.079 (14)*
H810.362 (3)0.916 (4)0.059 (2)0.034 (8)*
H820.307 (4)0.708 (5)0.072 (3)0.059 (11)*
H1010.521 (4)0.642 (4)0.127 (2)0.034 (9)*
H1020.570 (4)0.848 (5)0.114 (2)0.041 (9)*
H1110.639 (4)0.713 (5)0.245 (3)0.059 (11)*
H1120.737 (5)0.564 (7)0.172 (3)0.072 (14)*
H1130.801 (5)0.765 (6)0.163 (3)0.072 (13)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0331 (13)0.0699 (18)0.0287 (11)0.0197 (13)0.0025 (10)0.0057 (11)
O20.0321 (12)0.0669 (17)0.0307 (12)0.0139 (13)0.0104 (10)0.0028 (11)
N10.0419 (17)0.0455 (18)0.0225 (13)0.0048 (14)0.0056 (12)0.0015 (12)
C20.0314 (17)0.0426 (19)0.0301 (15)0.0038 (16)0.0124 (13)0.0000 (14)
C30.0296 (15)0.0255 (16)0.0275 (14)0.0007 (14)0.0084 (12)0.0014 (13)
C40.0299 (17)0.0265 (17)0.0338 (16)0.0020 (14)0.0092 (13)0.0016 (12)
C50.0312 (19)0.042 (2)0.0433 (18)0.0042 (16)0.0113 (15)0.0041 (16)
C60.0272 (18)0.054 (2)0.0469 (19)0.0065 (19)0.0009 (15)0.0053 (17)
C70.0367 (19)0.045 (2)0.0353 (18)0.0036 (18)0.0043 (16)0.0010 (16)
C80.0292 (17)0.0357 (19)0.0251 (14)0.0024 (15)0.0083 (13)0.0002 (14)
C90.0274 (17)0.0294 (16)0.0283 (15)0.0004 (14)0.0072 (13)0.0021 (13)
C100.0290 (17)0.037 (2)0.0334 (16)0.0010 (17)0.0099 (13)0.0006 (14)
C110.043 (2)0.065 (3)0.0365 (19)0.002 (2)0.0192 (17)0.0015 (17)
C310.0273 (15)0.0255 (17)0.0299 (15)0.0010 (14)0.0057 (12)0.0013 (12)
C710.0319 (17)0.0332 (18)0.0271 (15)0.0010 (15)0.0053 (13)0.0036 (13)
Geometric parameters (Å, º) top
O1—C91.320 (3)C31—C711.414 (4)
O2—C91.211 (3)O1—H110.96 (5)
N1—C21.368 (5)N1—H10.91 (4)
N1—C711.369 (4)C2—H20.90 (4)
C2—C31.361 (4)C5—H50.94 (3)
C3—C81.508 (4)C6—H61.02 (4)
C3—C311.443 (4)C7—H70.94 (3)
C4—C51.382 (5)C8—H811.01 (3)
C4—C101.508 (4)C8—H821.05 (4)
C4—C311.413 (4)C10—H1010.97 (3)
C5—C61.405 (4)C10—H1021.03 (4)
C6—C71.367 (5)C11—H1111.06 (4)
C7—C711.386 (5)C11—H1120.95 (5)
C8—C91.496 (4)C11—H1131.07 (5)
C10—C111.521 (5)
C2—N1—C71108.9 (3)N1—C2—H2121.4 (18)
N1—C2—C3110.3 (3)C3—C2—H2128.2 (19)
C2—C3—C8127.3 (3)C4—C5—H5120 (2)
C2—C3—C31106.6 (3)C6—C5—H5117 (2)
C8—C3—C31126.1 (3)C5—C6—H6117.0 (17)
C5—C4—C10122.1 (3)C7—C6—H6121.9 (17)
C5—C4—C31117.1 (3)C6—C7—H7120 (2)
C10—C4—C31120.8 (3)C71—C7—H7123 (2)
C4—C5—C6122.6 (3)C3—C8—H81111.3 (17)
C5—C6—C7121.1 (3)C3—C8—H82111 (2)
C6—C7—C71117.2 (3)C9—C8—H81101.2 (17)
C3—C8—C9118.3 (2)C9—C8—H82109 (2)
O1—C9—O2122.1 (3)H81—C8—H82104 (3)
O1—C9—C8111.7 (2)C4—C10—H101108.8 (17)
O2—C9—C8126.2 (3)C4—C10—H102107.5 (16)
C4—C10—C11117.1 (3)C11—C10—H101106.7 (19)
C3—C31—C4135.0 (3)C11—C10—H102109.7 (19)
C3—C31—C71106.2 (2)H101—C10—H102107 (3)
C4—C31—C71118.9 (3)C10—C11—H111108 (2)
N1—C71—C7128.8 (3)C10—C11—H112110 (3)
N1—C71—C31108.0 (3)C10—C11—H113112 (2)
C7—C71—C31123.2 (3)H111—C11—H112112 (3)
C9—O1—H11109 (3)H111—C11—H113110 (3)
C2—N1—H1124 (2)H112—C11—H113105 (4)
C71—N1—H1127 (2)
C71—N1—C2—C30.8 (4)C5—C4—C31—C3178.6 (3)
C2—N1—C71—C7178.6 (3)C5—C4—C31—C710.9 (4)
C2—N1—C71—C310.6 (4)C10—C4—C31—C31.4 (5)
N1—C2—C3—C8178.3 (3)C10—C4—C31—C71179.1 (3)
N1—C2—C3—C310.7 (4)C4—C5—C6—C70.2 (6)
C2—C3—C8—C96.7 (5)C5—C6—C7—C710.2 (5)
C31—C3—C8—C9174.6 (3)C6—C7—C71—N1179.1 (3)
C2—C3—C31—C4179.3 (4)C6—C7—C71—C310.0 (17)
C2—C3—C31—C710.3 (4)C3—C8—C9—O1177.3 (3)
C8—C3—C31—C41.7 (6)C3—C8—C9—O23.2 (5)
C8—C3—C31—C71178.7 (3)C3—C31—C71—N10.2 (4)
C10—C4—C5—C6179.3 (3)C3—C31—C71—C7179.1 (3)
C31—C4—C5—C60.8 (5)C4—C31—C71—N1179.9 (3)
C5—C4—C10—C111.5 (5)C4—C31—C71—C70.6 (5)
C31—C4—C10—C11178.5 (3)
(6-Et-IAA) 6-ethyl-indole-3-acetic acid top
Crystal data top
C12H13NO2F(000) = 432
Mr = 203.24Dx = 1.307 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
a = 22.455 (1) ÅCell parameters from 25 reflections
b = 5.286 (1) Åθ = 5–13°
c = 9.313 (1) ŵ = 0.09 mm1
β = 110.89 (1)°T = 103 K
V = 1032.76 (10) Å3Plate, colourless
Z = 40.30 × 0.20 × 0.06 mm
Data collection top
Enraf-Nonius CAD4
diffractometer
Rint = 0.052
Radiation source: fine-focus sealed tubeθmax = 25°, θmin = 2°
Graphite monochromatorh = 050
ω/2θ scansk = 09
2917 measured reflectionsl = 77
1476 independent reflections3 standard reflections every 87 reflections
814 reflections with I > 2σ(I) intensity decay: 2.4%
Refinement top
Refinement on FPrimary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.066Hydrogen site location: difference Fourier map
wR(F2) = 0.052All H-atom pleaced in stereochemically expected positions and treated as riding
S = 0.91Calculated w = 3.3591/[σ2(Fo) + 0.000091(Fo2)]
814 reflections(Δ/σ)max = 0.05
153 parametersΔρmax = 0.23 e Å3
0 restraintsΔρmin = 0.28 e Å3
0 constraints
Special details top

Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All e.s.d.'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.4866 (2)0.2564 (7)0.6155 (4)0.0544 (18)
O20.43424 (18)0.1004 (7)0.5175 (4)0.0542 (14)
N10.2633 (3)0.2782 (8)0.6324 (6)0.059 (2)
C20.3246 (4)0.1955 (10)0.7080 (7)0.059 (3)
C30.3359 (4)0.0156 (10)0.6321 (7)0.055 (3)
C40.2588 (4)0.2437 (11)0.3877 (7)0.052 (3)
C50.1982 (4)0.2344 (11)0.2821 (7)0.058 (3)
C60.1543 (4)0.0466 (10)0.2855 (8)0.055 (3)
C70.1724 (4)0.1369 (10)0.3998 (7)0.053 (3)
C80.3964 (3)0.1657 (10)0.6779 (7)0.058 (3)
C90.4407 (3)0.0919 (11)0.5944 (6)0.053 (3)
C100.0879 (4)0.0487 (10)0.1664 (8)0.070 (3)
C110.0465 (4)0.2574 (11)0.1914 (9)0.087 (4)
C310.2787 (4)0.0611 (9)0.5051 (7)0.049 (3)
C710.2337 (4)0.1267 (10)0.5067 (8)0.056 (3)
H10.2430 (3)0.4279 (8)0.6641 (6)0.1500*
H20.3585 (4)0.2804 (10)0.8100 (7)0.051 (16)*
H40.2912 (4)0.3903 (11)0.3811 (7)0.061 (16)*
H50.1835 (4)0.3763 (11)0.1928 (7)0.042 (13)*
H70.1397 (4)0.2833 (10)0.4048 (7)0.058 (16)*
H110.521 (3)0.210 (13)0.570 (8)0.1500*
H810.4216 (3)0.1399 (10)0.7997 (7)0.060 (16)*
H820.3841 (3)0.3627 (10)0.6545 (7)0.074 (16)*
H1010.0655 (4)0.1308 (10)0.1703 (8)0.052 (15)*
H1020.0913 (4)0.0737 (10)0.0545 (8)0.12 (2)*
H1110.0016 (4)0.2558 (11)0.1087 (9)0.08 (2)*
H1120.0456 (4)0.2237 (11)0.3049 (9)0.15 (3)*
H1130.0680 (4)0.4392 (11)0.1888 (9)0.11 (2)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.098 (4)0.027 (2)0.058 (3)0.009 (3)0.052 (3)0.002 (2)
O20.102 (3)0.031 (2)0.050 (2)0.011 (2)0.052 (2)0.009 (2)
N10.124 (5)0.024 (3)0.055 (4)0.007 (3)0.064 (4)0.008 (3)
C20.122 (6)0.026 (3)0.050 (5)0.026 (4)0.057 (5)0.008 (3)
C30.116 (6)0.023 (3)0.055 (5)0.015 (4)0.066 (5)0.001 (3)
C40.113 (6)0.019 (3)0.055 (4)0.004 (4)0.067 (4)0.007 (4)
C50.130 (6)0.019 (3)0.052 (4)0.001 (5)0.067 (5)0.003 (4)
C60.120 (6)0.020 (3)0.049 (4)0.000 (4)0.058 (5)0.005 (3)
C70.120 (6)0.015 (3)0.053 (4)0.003 (4)0.066 (5)0.001 (3)
C80.116 (6)0.028 (3)0.058 (4)0.008 (4)0.064 (4)0.001 (3)
C90.107 (6)0.032 (3)0.037 (4)0.022 (4)0.045 (4)0.014 (3)
C100.138 (7)0.025 (4)0.064 (5)0.020 (4)0.056 (6)0.011 (4)
C110.110 (8)0.033 (4)0.097 (7)0.012 (5)0.011 (6)0.017 (4)
C310.109 (6)0.015 (3)0.055 (4)0.009 (4)0.067 (4)0.001 (3)
C710.127 (7)0.016 (3)0.055 (5)0.007 (5)0.068 (5)0.002 (4)
Geometric parameters (Å, º) top
O1—C91.309 (8)C8—C91.516 (9)
O2—C91.222 (7)C10—C111.513 (11)
O1—H111.03 (7)C31—C711.420 (11)
N1—C711.378 (8)C2—H21.081 (9)
N1—C21.375 (11)C4—H41.080 (11)
N1—H11.008 (8)C5—H51.080 (8)
C2—C31.392 (9)C7—H71.079 (11)
C3—C81.498 (10)C8—H811.081 (9)
C3—C311.422 (10)C8—H821.079 (8)
C4—C311.407 (8)C10—H1011.081 (9)
C4—C51.366 (11)C10—H1021.08 (1)
C5—C61.407 (11)C11—H1111.080 (12)
C6—C101.508 (12)C11—H1121.079 (11)
C6—C71.389 (8)C11—H1131.08 (1)
C7—C711.383 (12)
O1···C8i3.418 (7)H1···C5vi2.304 (9)
O1···C9i3.157 (7)H1···C6vi2.637 (11)
O1···O2ii2.635 (6)H1···C31vi3.032 (8)
O2···O1ii2.635 (6)H2···H82v2.565 (9)
O2···C2iii3.236 (8)H2···H11ix2.53 (7)
O2···C9ii3.326 (8)H2···O2vi2.163 (8)
O1···H81iv2.832 (7)H4···C2iv2.574 (10)
O1···H81i2.797 (7)H4···C3iv2.880 (11)
O2···H11ii1.61 (7)H5···H1022.569 (11)
O2···H2iii2.163 (8)H5···C7iv2.987 (9)
N1···C4v3.380 (8)H5···C71iv2.724 (11)
N1···C4vi3.448 (8)H7···H1012.367 (10)
N1···C5vi3.369 (9)H7···H113v2.546 (10)
C2···O2vi3.236 (8)H7···H102vi2.562 (10)
C2···C4vii3.529 (10)H11···H2i2.53 (7)
C4···N1iii3.448 (8)H11···O2ii1.61 (7)
C4···N1viii3.380 (8)H11···C9ii2.56 (7)
C4···C2iv3.529 (10)H11···H11ii2.58 (10)
C5···N1iii3.369 (9)H81···O1ix2.797 (7)
C8···O1ix3.418 (7)H81···O1vii2.832 (7)
C9···O2ii3.326 (8)H81···C9vii2.981 (8)
C9···O1ix3.157 (7)H82···C2viii2.822 (9)
C2···H82v2.822 (9)H82···C43.082 (10)
C2···H4vii2.574 (10)H82···H2viii2.565 (9)
C3···H4vii2.880 (11)H101···H72.367 (10)
C4···H823.082 (10)H101···H113v2.279 (8)
C4···H1iii2.537 (8)H101···H111x2.567 (10)
C5···H1132.943 (12)H102···H52.569 (11)
C5···H1iii2.304 (9)H102···H7iii2.562 (10)
C6···H1iii2.637 (11)H102···H112iv2.429 (10)
C7···H5vii2.987 (9)H111···C10x3.061 (10)
C9···H11ii2.56 (7)H111···H101x2.567 (10)
C9···H81iv2.981 (8)H112···H102vii2.429 (10)
C10···H111x3.061 (10)H113···C52.943 (12)
C31···H1iii3.032 (8)H113···H7viii2.546 (10)
C71···H5vii2.724 (11)H113···H101viii2.279 (8)
H1···C4vi2.537 (8)
C9—O1—H11116 (4)N1—C2—H2125.5 (7)
C2—N1—C71110.0 (6)C3—C2—H2125.5 (9)
C71—N1—H1125.0 (7)C5—C4—H4120.2 (7)
C2—N1—H1125.0 (6)C31—C4—H4120.2 (8)
N1—C2—C3109.0 (6)C4—C5—H5118.8 (8)
C2—C3—C31106.5 (7)C6—C5—H5118.9 (8)
C2—C3—C8126.2 (6)C6—C7—H7121.1 (8)
C8—C3—C31127.3 (5)C71—C7—H7121.0 (7)
C5—C4—C31119.6 (7)C3—C8—H81108.3 (6)
C4—C5—C6122.3 (6)C3—C8—H82108.2 (7)
C7—C6—C10120.7 (7)C9—C8—H81108.2 (7)
C5—C6—C7119.6 (7)C9—C8—H82108.2 (6)
C5—C6—C10119.7 (6)H81—C8—H82109.5 (7)
C6—C7—C71117.9 (7)C6—C10—H101108.6 (7)
C3—C8—C9114.3 (5)C6—C10—H102108.6 (9)
O1—C9—O2124.3 (6)C11—C10—H101108.4 (9)
O1—C9—C8112.2 (5)C11—C10—H102108.5 (7)
O2—C9—C8123.5 (6)H101—C10—H102109.5 (7)
C6—C10—C11113.1 (6)C10—C11—H111113.4 (7)
C4—C31—C71117.2 (7)C10—C11—H112104.9 (7)
C3—C31—C4134.8 (7)C10—C11—H113110.0 (9)
C3—C31—C71107.9 (5)H111—C11—H112109.5 (10)
N1—C71—C7130.1 (7)H111—C11—H113109.4 (8)
N1—C71—C31106.6 (7)H112—C11—H113109.5 (8)
C7—C71—C31123.3 (6)
C2—N1—C71—C310.6 (8)C4—C5—C6—C70.2 (12)
C71—N1—C2—C30.4 (8)C4—C5—C6—C10179.4 (7)
C2—N1—C71—C7179.1 (7)C7—C6—C10—C11106.0 (7)
N1—C2—C3—C310.1 (8)C5—C6—C10—C1173.2 (9)
N1—C2—C3—C8179.2 (6)C10—C6—C7—C71179.2 (7)
C8—C3—C31—C71179.5 (7)C5—C6—C7—C710.0 (11)
C2—C3—C8—C996.4 (8)C6—C7—C71—N1178.2 (7)
C8—C3—C31—C40.5 (13)C6—C7—C71—C310.0 (11)
C31—C3—C8—C984.5 (8)C3—C8—C9—O1167.9 (5)
C2—C3—C31—C4178.7 (8)C3—C8—C9—O212.7 (8)
C2—C3—C31—C710.3 (8)C4—C31—C71—N1178.7 (6)
C31—C4—C5—C60.3 (11)C4—C31—C71—C70.0 (11)
C5—C4—C31—C710.2 (11)C3—C31—C71—C7179.2 (7)
C5—C4—C31—C3178.8 (8)C3—C31—C71—N10.6 (8)
Symmetry codes: (i) x+1, y+1/2, z+3/2; (ii) x+1, y, z+1; (iii) x, y1/2, z1/2; (iv) x, y+1/2, z1/2; (v) x, y1, z; (vi) x, y1/2, z+1/2; (vii) x, y+1/2, z+1/2; (viii) x, y+1, z; (ix) x+1, y1/2, z+3/2; (x) x, y, z.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H11···O2ii1.03 (7)1.61 (7)2.635 (6)170 (6)
C2—H2···O2vi1.08 (1)2.16 (1)3.236 (8)172 (1)
Symmetry codes: (ii) x+1, y, z+1; (vi) x, y1/2, z+1/2.
(iaalt) indole-3-acetic acid top
Crystal data top
C10H9NO2F(000) = 368
Mr = 175.19Dx = 1.383 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 25 reflections
a = 17.8100 (5) Åθ = 6–17°
b = 5.1750 (4) ŵ = 0.10 mm1
c = 9.5340 (4) ÅT = 103 K
β = 106.700 (6)°Prismatic, colourless
V = 841.66 (8) Å30.60 × 0.45 × 0.15 mm
Z = 4
Data collection top
Enraf-Nonius CAD4
diffractometer
Rint = 0.014
Radiation source: fine-focus sealed tubeθmax = 25°, θmin = 2°
Graphite monochromatorh = 2020
ω/2θ scansk = 06
1236 measured reflectionsl = 011
1214 independent reflections3 standard reflections every 87 reflections
1180 reflections with I > 3σ(I) intensity decay: 0.1%
Refinement top
Refinement on F0 restraints
Least-squares matrix: full0 constraints
R[F2 > 2σ(F2)] = 0.038H-atom refinement: see text
wR(F2) = 0.040Calculated w = 5.4218/[σ2(Fo) + 0.00000(Fo2)]
S = 0.86(Δ/σ)max = 0.005
1180 reflectionsΔρmax = 0.20 e Å3
157 parametersΔρmin = 0.22 e Å3
Special details top

Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All e.s.d.'s are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.0157 (1)0.7342 (3)0.3859 (2)0.0310 (5)
O20.0800 (1)1.0996 (3)0.4669 (2)0.0286 (5)
N10.2875 (1)1.2749 (3)0.3120 (2)0.0281 (6)
C20.2129 (1)1.1844 (4)0.2547 (2)0.0278 (7)
C30.2001 (1)0.9785 (4)0.3347 (2)0.0239 (7)
C40.2964 (1)0.7584 (4)0.5629 (2)0.0239 (6)
C50.3721 (1)0.7719 (4)0.6543 (2)0.0272 (7)
C60.4241 (1)0.9633 (4)0.6350 (2)0.0292 (8)
C70.4017 (1)1.1432 (4)0.5242 (2)0.0273 (7)
C80.1268 (1)0.8226 (4)0.3066 (3)0.0280 (7)
C90.0727 (1)0.9004 (4)0.3950 (2)0.0239 (7)
C310.2716 (1)0.9394 (4)0.4493 (2)0.0202 (6)
C710.3256 (1)1.1285 (4)0.4324 (2)0.0219 (6)
H10.3120 (13)1.412 (5)0.271 (3)0.047 (7)*
H20.1781 (10)1.253 (4)0.163 (2)0.024 (5)*
H40.2591 (11)0.623 (4)0.579 (2)0.030 (6)*
H50.3890 (11)0.650 (4)0.734 (2)0.037 (6)*
H60.4774 (10)0.966 (4)0.7023 (19)0.021 (5)*
H70.4395 (12)1.274 (5)0.508 (2)0.045 (7)*
H110.0170 (13)0.795 (5)0.437 (3)0.062 (9)*
H810.0933 (11)0.833 (4)0.199 (2)0.035 (6)*
H820.1394 (12)0.651 (5)0.330 (2)0.041 (7)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0295 (8)0.0248 (8)0.0435 (10)0.0040 (8)0.0183 (7)0.0115 (8)
O20.0302 (8)0.0245 (8)0.0338 (9)0.0025 (7)0.0137 (7)0.0122 (8)
N10.0379 (11)0.0172 (10)0.0336 (11)0.0031 (9)0.0172 (9)0.0049 (9)
C20.0357 (13)0.0225 (12)0.0264 (12)0.0105 (10)0.0110 (11)0.0004 (11)
C30.0284 (11)0.0201 (11)0.0266 (12)0.0042 (10)0.0133 (10)0.0056 (10)
C40.0315 (11)0.0136 (10)0.0326 (12)0.0003 (10)0.0186 (10)0.0011 (10)
C50.0341 (12)0.0181 (11)0.0318 (13)0.0080 (11)0.0133 (11)0.0041 (11)
C60.0263 (12)0.0245 (13)0.0355 (14)0.004 (1)0.0068 (11)0.0040 (11)
C70.0293 (12)0.0169 (11)0.0404 (14)0.0011 (10)0.0176 (11)0.0032 (11)
C80.0265 (12)0.0253 (13)0.0335 (13)0.0026 (10)0.0106 (11)0.0078 (12)
C90.0230 (11)0.0231 (12)0.0232 (11)0.0036 (10)0.0027 (9)0.0005 (11)
C310.0272 (11)0.0113 (10)0.0264 (12)0.0040 (8)0.0146 (10)0.0031 (9)
C710.0297 (11)0.0116 (10)0.0289 (12)0.0017 (9)0.0154 (10)0.0006 (10)
Geometric parameters (Å, º) top
O1—C91.314 (3)C6—C71.378 (3)
O2—C91.224 (3)C7—C711.388 (3)
O1—H110.92 (3)C8—C91.506 (3)
N1—C21.366 (3)C31—C711.413 (3)
N1—C711.380 (3)C2—H20.981 (19)
N1—H10.97 (3)C4—H41.01 (2)
C2—C31.367 (3)C5—H50.967 (19)
C3—C311.434 (3)C6—H60.981 (18)
C3—C81.492 (3)C7—H71.00 (2)
C4—C311.404 (3)C8—H811.029 (19)
C4—C51.381 (3)C8—H820.93 (3)
C5—C61.404 (3)
O1···C8i3.416 (3)C4···H823.08 (2)
O1···C9i3.196 (3)C4···H1iii2.57 (3)
O1···O2ii2.644 (3)C5···H6x3.075 (19)
O2···C9ii3.345 (3)C5···H1iii2.40 (3)
O2···O1ii2.644 (3)C6···H1iii2.75 (3)
O2···C2iii3.263 (3)C9···H81viii3.063 (19)
O1···H81i2.80 (2)C9···H11ii2.64 (3)
O2···H11ii1.73 (3)C31···H1iii3.04 (3)
O2···H2iii2.292 (19)C71···H5vi2.86 (2)
N1···C4iv3.434 (3)H1···C4v2.57 (3)
N1···C4v3.423 (3)H1···C5v2.40 (3)
N1···C5v3.366 (3)H1···C6v2.75 (3)
C2···O2v3.263 (3)H1···C31v3.04 (3)
C2···C4vi3.517 (3)H2···O2v2.292 (19)
C4···C71vii3.580 (3)H4···C2viii2.61 (2)
C4···C2viii3.517 (3)H4···C3viii2.966 (19)
C4···N1vii3.434 (3)H5···H6x2.47 (3)
C4···N1iii3.423 (3)H5···C71viii2.86 (2)
C5···C7vii3.575 (3)H6···C5xi3.075 (19)
C5···N1iii3.366 (3)H6···H5xi2.47 (3)
C7···C5iv3.575 (3)H11···O2ii1.73 (3)
C8···O1ix3.416 (3)H11···C9ii2.64 (3)
C9···O2ii3.345 (3)H11···H11ii2.43 (4)
C9···O1ix3.196 (3)H81···O1ix2.80 (2)
C71···C4iv3.580 (3)H81···C9vi3.063 (19)
C2···H82iv2.93 (2)H82···C2vii2.93 (2)
C2···H4vi2.61 (2)H82···C43.08 (2)
C3···H4vi2.966 (19)
C9—O1—H11109.7 (16)N1—C71—C7130.69 (19)
C2—N1—C71109.49 (16)N1—C71—C31106.67 (16)
C2—N1—H1125.9 (16)C7—C71—C31122.62 (18)
C71—N1—H1124.4 (15)N1—C2—H2121.7 (12)
N1—C2—C3110.06 (17)C3—C2—H2128.0 (12)
C2—C3—C8126.79 (18)C5—C4—H4120.4 (11)
C2—C3—C31106.33 (17)C31—C4—H4120.4 (11)
C8—C3—C31126.88 (19)C4—C5—H5119.3 (12)
C5—C4—C31119.13 (18)C6—C5—H5119.7 (12)
C4—C5—C6120.95 (18)C5—C6—H6118.4 (12)
C5—C6—C7121.37 (17)C7—C6—H6120.3 (12)
C6—C7—C71117.47 (18)C6—C7—H7121.2 (12)
C3—C8—C9114.99 (19)C71—C7—H7121.3 (12)
O1—C9—O2122.95 (19)C3—C8—H81112.2 (12)
O1—C9—C8113.23 (18)C3—C8—H82109.6 (14)
O2—C9—C8123.82 (19)C9—C8—H81105.2 (11)
C4—C31—C71118.45 (17)C9—C8—H82105.7 (13)
C3—C31—C4134.07 (18)H81—C8—H82108.7 (17)
C3—C31—C71107.44 (17)
C71—N1—C2—C30.1 (2)C5—C4—C31—C710.4 (3)
C2—N1—C71—C310.0 (2)C31—C4—C5—C60.0 (3)
C2—N1—C71—C7178.7 (2)C4—C5—C6—C70.3 (3)
N1—C2—C3—C310.1 (2)C5—C6—C7—C710.1 (3)
N1—C2—C3—C8178.89 (19)C6—C7—C71—C310.3 (3)
C31—C3—C8—C984.4 (3)C6—C7—C71—N1178.3 (2)
C2—C3—C8—C996.9 (3)C3—C8—C9—O211.5 (3)
C2—C3—C31—C710.1 (2)C3—C8—C9—O1169.35 (18)
C8—C3—C31—C41.0 (4)C4—C31—C71—C70.5 (3)
C2—C3—C31—C4178.0 (2)C3—C31—C71—N10.0 (2)
C8—C3—C31—C71178.91 (19)C4—C31—C71—N1178.33 (17)
C5—C4—C31—C3178.1 (2)C3—C31—C71—C7178.82 (18)
Symmetry codes: (i) x, y1/2, z+1/2; (ii) x, y+2, z+1; (iii) x, y+5/2, z+1/2; (iv) x, y+1, z; (v) x, y+5/2, z1/2; (vi) x, y+3/2, z1/2; (vii) x, y1, z; (viii) x, y+3/2, z+1/2; (ix) x, y+1/2, z+1/2; (x) x+1, y1/2, z+3/2; (xi) x+1, y+1/2, z+3/2.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H11···O2ii0.92 (3)1.73 (3)2.644 (3)178 (2)
C2—H2···O2v0.98 (2)2.29 (2)3.263 (3)170 (2)
Symmetry codes: (ii) x, y+2, z+1; (v) x, y+5/2, z1/2.
 

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