In the crystal structure of the title compound, C
20H
20N
2O
4, the molecules are linked by a weak intermolecular C—H
N hydrogen bond. The molecule has crystallographic twofold rotation symmetry.
Supporting information
CCDC reference: 282518
Key indicators
- Single-crystal X-ray study
- T = 294 K
- Mean (C-C) = 0.002 Å
- R factor = 0.040
- wR factor = 0.115
- Data-to-parameter ratio = 15.0
checkCIF/PLATON results
No syntax errors found
Alert level C
PLAT125_ALERT_4_C No _symmetry_space_group_name_Hall Given ....... ?
0 ALERT level A = In general: serious problem
0 ALERT level B = Potentially serious problem
1 ALERT level C = Check and explain
0 ALERT level G = General alerts; check
0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
0 ALERT type 2 Indicator that the structure model may be wrong or deficient
0 ALERT type 3 Indicator that the structure quality may be low
1 ALERT type 4 Improvement, methodology, query or suggestion
Data collection: SMART (Bruker, 1998); cell refinement: SMART; data reduction: SAINT (Bruker, 1999); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1999); software used to prepare material for publication: SHELXTL.
3,6-Bis(4-methoxybenzyloxy)pyridazine
top
Crystal data top
C20H20N2O4 | F(000) = 744 |
Mr = 352.38 | Dx = 1.327 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
a = 33.126 (9) Å | Cell parameters from 1236 reflections |
b = 5.7499 (15) Å | θ = 3.6–24.3° |
c = 9.258 (3) Å | µ = 0.09 mm−1 |
β = 90.305 (5)° | T = 294 K |
V = 1763.4 (9) Å3 | Prism, colourless |
Z = 4 | 0.24 × 0.22 × 0.18 mm |
Data collection top
Bruker SMART CCD area-detector diffractometer | 1801 independent reflections |
Radiation source: fine-focus sealed tube | 1051 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.039 |
φ and ω scans | θmax = 26.4°, θmin = 1.2° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −40→40 |
Tmin = 0.958, Tmax = 0.981 | k = −7→7 |
4724 measured reflections | l = −5→11 |
Refinement top
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.040 | H-atom parameters constrained |
wR(F2) = 0.115 | w = 1/[σ2(Fo2) + (0.0535P)2 + 0.2049P] where P = (Fo2 + 2Fc2)/3 |
S = 1.02 | (Δ/σ)max < 0.001 |
1801 reflections | Δρmax = 0.14 e Å−3 |
120 parameters | Δρmin = −0.13 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0041 (7) |
Special details top
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes)
are estimated using the full covariance matrix. The cell e.s.d.'s are taken
into account individually in the estimation of e.s.d.'s in distances, angles
and torsion angles; correlations between e.s.d.'s in cell parameters are only
used when they are defined by crystal symmetry. An approximate (isotropic)
treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s.
planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor
wR and goodness of fit S are based on F2, conventional
R-factors R are based on F, with F set to zero for
negative F2. The threshold expression of F2 >
σ(F2) is used only for calculating R-factors(gt) etc.
and is not relevant to the choice of reflections for refinement.
R-factors based on F2 are statistically about twice as large
as those based on F, and R- factors based on ALL data will be
even larger. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
N1 | 0.01578 (4) | 0.3557 (2) | 0.29869 (15) | 0.0499 (4) | |
O1 | 0.06104 (4) | 0.15148 (18) | 0.43833 (13) | 0.0549 (4) | |
O2 | 0.21161 (4) | 0.2162 (2) | 0.85610 (14) | 0.0640 (4) | |
C1 | 0.01515 (5) | −0.0621 (3) | 0.29854 (18) | 0.0516 (5) | |
H1 | 0.0259 | −0.2001 | 0.3343 | 0.062* | |
C2 | 0.02988 (5) | 0.1561 (3) | 0.34379 (18) | 0.0438 (4) | |
C3 | 0.07675 (5) | 0.3697 (3) | 0.4887 (2) | 0.0542 (5) | |
H3A | 0.0561 | 0.4539 | 0.5410 | 0.065* | |
H3B | 0.0852 | 0.4641 | 0.4075 | 0.065* | |
C4 | 0.11205 (5) | 0.3210 (3) | 0.58619 (17) | 0.0453 (4) | |
C5 | 0.11504 (5) | 0.1196 (3) | 0.6676 (2) | 0.0521 (5) | |
H5 | 0.0946 | 0.0091 | 0.6607 | 0.062* | |
C6 | 0.14746 (5) | 0.0774 (3) | 0.75892 (18) | 0.0523 (5) | |
H6 | 0.1488 | −0.0597 | 0.8120 | 0.063* | |
C7 | 0.17786 (5) | 0.2410 (3) | 0.77051 (17) | 0.0467 (4) | |
C8 | 0.17540 (5) | 0.4431 (3) | 0.69093 (19) | 0.0564 (5) | |
H8 | 0.1958 | 0.5537 | 0.6983 | 0.068* | |
C9 | 0.14294 (5) | 0.4823 (3) | 0.60046 (18) | 0.0552 (5) | |
H9 | 0.1417 | 0.6200 | 0.5478 | 0.066* | |
C10 | 0.21633 (6) | 0.0067 (4) | 0.9345 (2) | 0.0728 (6) | |
H10A | 0.1928 | −0.0197 | 0.9924 | 0.109* | |
H10B | 0.2397 | 0.0179 | 0.9959 | 0.109* | |
H10C | 0.2197 | −0.1203 | 0.8683 | 0.109* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
N1 | 0.0558 (9) | 0.0353 (7) | 0.0585 (10) | 0.0012 (6) | −0.0154 (7) | −0.0021 (7) |
O1 | 0.0579 (7) | 0.0394 (6) | 0.0672 (8) | 0.0044 (5) | −0.0187 (7) | −0.0028 (6) |
O2 | 0.0629 (8) | 0.0633 (8) | 0.0657 (9) | −0.0095 (7) | −0.0207 (7) | 0.0043 (7) |
C1 | 0.0515 (10) | 0.0338 (8) | 0.0693 (13) | 0.0030 (7) | −0.0061 (9) | 0.0040 (8) |
C2 | 0.0428 (9) | 0.0380 (9) | 0.0503 (10) | 0.0023 (7) | −0.0044 (9) | −0.0012 (8) |
C3 | 0.0599 (11) | 0.0400 (9) | 0.0625 (12) | 0.0009 (8) | −0.0129 (10) | −0.0024 (9) |
C4 | 0.0501 (10) | 0.0416 (9) | 0.0441 (10) | 0.0013 (8) | −0.0015 (9) | −0.0030 (8) |
C5 | 0.0457 (10) | 0.0485 (10) | 0.0620 (12) | −0.0071 (8) | −0.0080 (9) | 0.0065 (9) |
C6 | 0.0536 (11) | 0.0486 (10) | 0.0546 (11) | −0.0042 (9) | −0.0039 (10) | 0.0107 (9) |
C7 | 0.0490 (10) | 0.0514 (10) | 0.0396 (9) | −0.0017 (8) | −0.0067 (9) | −0.0056 (8) |
C8 | 0.0619 (11) | 0.0487 (10) | 0.0585 (12) | −0.0161 (9) | −0.0098 (10) | −0.0024 (9) |
C9 | 0.0704 (13) | 0.0411 (10) | 0.0538 (11) | −0.0064 (9) | −0.0100 (11) | 0.0033 (8) |
C10 | 0.0673 (13) | 0.0756 (14) | 0.0752 (14) | 0.0000 (11) | −0.0248 (12) | 0.0127 (12) |
Geometric parameters (Å, º) top
N1—C2 | 1.3070 (19) | C4—C9 | 1.387 (2) |
N1—N1i | 1.377 (3) | C5—C6 | 1.385 (2) |
O1—C2 | 1.350 (2) | C5—H5 | 0.9300 |
O1—C3 | 1.4356 (19) | C6—C7 | 1.382 (2) |
O2—C7 | 1.3741 (19) | C6—H6 | 0.9300 |
O2—C10 | 1.415 (2) | C7—C8 | 1.378 (2) |
C1—C1i | 1.344 (3) | C8—C9 | 1.378 (2) |
C1—C2 | 1.409 (2) | C8—H8 | 0.9300 |
C1—H1 | 0.9300 | C9—H9 | 0.9300 |
C3—C4 | 1.499 (2) | C10—H10A | 0.9600 |
C3—H3A | 0.9700 | C10—H10B | 0.9600 |
C3—H3B | 0.9700 | C10—H10C | 0.9600 |
C4—C5 | 1.385 (2) | | |
| | | |
C2—N1—N1i | 118.56 (9) | C4—C5—H5 | 118.9 |
C2—O1—C3 | 117.92 (12) | C7—C6—C5 | 119.39 (16) |
C7—O2—C10 | 118.16 (14) | C7—C6—H6 | 120.3 |
C1i—C1—C2 | 117.08 (9) | C5—C6—H6 | 120.3 |
C1i—C1—H1 | 121.5 | O2—C7—C8 | 116.21 (16) |
C2—C1—H1 | 121.5 | O2—C7—C6 | 124.35 (16) |
N1—C2—O1 | 119.68 (14) | C8—C7—C6 | 119.43 (16) |
N1—C2—C1 | 124.35 (16) | C7—C8—C9 | 120.45 (16) |
O1—C2—C1 | 115.96 (14) | C7—C8—H8 | 119.8 |
O1—C3—C4 | 108.22 (13) | C9—C8—H8 | 119.8 |
O1—C3—H3A | 110.1 | C8—C9—C4 | 121.43 (16) |
C4—C3—H3A | 110.1 | C8—C9—H9 | 119.3 |
O1—C3—H3B | 110.1 | C4—C9—H9 | 119.3 |
C4—C3—H3B | 110.1 | O2—C10—H10A | 109.5 |
H3A—C3—H3B | 108.4 | O2—C10—H10B | 109.5 |
C5—C4—C9 | 117.18 (16) | H10A—C10—H10B | 109.5 |
C5—C4—C3 | 122.48 (15) | O2—C10—H10C | 109.5 |
C9—C4—C3 | 120.33 (15) | H10A—C10—H10C | 109.5 |
C6—C5—C4 | 122.13 (16) | H10B—C10—H10C | 109.5 |
C6—C5—H5 | 118.9 | | |
| | | |
N1i—N1—C2—O1 | 179.44 (16) | C4—C5—C6—C7 | 0.3 (3) |
N1i—N1—C2—C1 | 0.5 (3) | C10—O2—C7—C8 | −177.09 (15) |
C3—O1—C2—N1 | 1.7 (2) | C10—O2—C7—C6 | 2.0 (3) |
C3—O1—C2—C1 | −179.31 (15) | C5—C6—C7—O2 | −179.10 (16) |
C1i—C1—C2—N1 | 0.7 (3) | C5—C6—C7—C8 | 0.0 (3) |
C1i—C1—C2—O1 | −178.27 (18) | O2—C7—C8—C9 | 179.15 (15) |
C2—O1—C3—C4 | −177.40 (13) | C6—C7—C8—C9 | 0.0 (3) |
O1—C3—C4—C5 | −29.5 (2) | C7—C8—C9—C4 | −0.2 (3) |
O1—C3—C4—C9 | 151.99 (16) | C5—C4—C9—C8 | 0.5 (3) |
C9—C4—C5—C6 | −0.5 (3) | C3—C4—C9—C8 | 179.05 (16) |
C3—C4—C5—C6 | −179.05 (15) | | |
Symmetry code: (i) −x, y, −z+1/2. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···N1ii | 0.93 | 2.60 | 3.348 (2) | 138 |
Symmetry code: (ii) x, y−1, z. |