Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S0108270103009272/sk1632sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S0108270103009272/sk1632Isup2.hkl |
CCDC reference: 217137
N-(o-Chlorophenyl)-2,5-dimethylpyrrole-3-carbaldehyde was prepared by condensation of hexane-2,5-dione with 2-chloroaniline and subsequent Vilsmeier–Haack formylation of the pyrrole ring (Vorkapić-Furač et al., 1989), according to the modified procedure given for the preparation of? pyrrole-2-carbaldehyde and N-methylpyrrole-2-carbaldehyde (Silverstein et al., 1955). Compound (I) was recrystallized twice from a methanol–water (50:50, v/v) mixture and obtained as yellow crystals (yield 89%, m.p. 333 K). The structure of the compound was confirmed by elemental analysis and IR, UV, NMR and electron impact spectra (Vorkapić-Furač et al., 1989). A single-crystal was obtained by slow evaporation at room temperature from a methanol–water solution (50:50, v/v).
H atoms attached to C6 atoms were found in a difference Fourier map and the coordinates and isotropic thermal parameters were refined freely. All other H atoms were included in calculated positions as riding atoms, with C—H distances of 0.96 Å for methyl H atoms and 0.93 Å for the remaining H atoms.
Data collection: COLLECT (Nonius, 2000); cell refinement: DENZO–SMN (Otwinowski & Minor, 1997); data reduction: DENZO–SMN (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).
C13H12ClNO | F(000) = 1464 |
Mr = 233.69 | Dx = 1.291 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 8586 reflections |
a = 21.6815 (3) Å | θ = 2.6–27.5° |
b = 8.6127 (1) Å | µ = 0.30 mm−1 |
c = 19.7231 (2) Å | T = 293 K |
β = 101.6257 (5)° | Prismatic, yellow |
V = 3607.46 (8) Å3 | 0.35 × 0.35 × 0.15 mm |
Z = 12 |
Nonius KappaCCD area-detector diffractometer | 8109 independent reflections |
Radiation source: fine-focus sealed tube | 5495 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.040 |
ϕ and ω scans | θmax = 27.4°, θmin = 3.4° |
Absorption correction: multi-scan DENZO-SMN (Otwinowski & Minor, 1997) | h = −28→27 |
Tmin = 0.902, Tmax = 0.957 | k = −11→10 |
43063 measured reflections | l = −25→25 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.056 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.159 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0706P)2 + 1.2178P] where P = (Fo2 + 2Fc2)/3 |
8109 reflections | (Δ/σ)max = 0.001 |
451 parameters | Δρmax = 0.32 e Å−3 |
0 restraints | Δρmin = −0.41 e Å−3 |
C13H12ClNO | V = 3607.46 (8) Å3 |
Mr = 233.69 | Z = 12 |
Monoclinic, P21/c | Mo Kα radiation |
a = 21.6815 (3) Å | µ = 0.30 mm−1 |
b = 8.6127 (1) Å | T = 293 K |
c = 19.7231 (2) Å | 0.35 × 0.35 × 0.15 mm |
β = 101.6257 (5)° |
Nonius KappaCCD area-detector diffractometer | 8109 independent reflections |
Absorption correction: multi-scan DENZO-SMN (Otwinowski & Minor, 1997) | 5495 reflections with I > 2σ(I) |
Tmin = 0.902, Tmax = 0.957 | Rint = 0.040 |
43063 measured reflections |
R[F2 > 2σ(F2)] = 0.056 | 0 restraints |
wR(F2) = 0.159 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.02 | Δρmax = 0.32 e Å−3 |
8109 reflections | Δρmin = −0.41 e Å−3 |
451 parameters |
x | y | z | Uiso*/Ueq | ||
Cl1A | 0.48046 (4) | 0.03988 (10) | 0.23429 (3) | 0.0950 (3) | |
N1A | 0.50037 (7) | 0.08243 (19) | 0.38620 (8) | 0.0482 (4) | |
O1A | 0.59812 (9) | 0.5316 (2) | 0.47022 (9) | 0.0806 (5) | |
C2A | 0.48663 (9) | 0.2348 (2) | 0.39532 (9) | 0.0492 (4) | |
C3A | 0.54292 (9) | 0.3074 (2) | 0.42339 (9) | 0.0496 (4) | |
C4A | 0.59147 (10) | 0.1946 (2) | 0.43005 (10) | 0.0543 (5) | |
H4A | 0.6341 | 0.2123 | 0.4473 | 0.065* | |
C5A | 0.56522 (9) | 0.0571 (2) | 0.40701 (10) | 0.0537 (5) | |
C6A | 0.54944 (12) | 0.4693 (3) | 0.44217 (11) | 0.0611 (5) | |
H6A | 0.5102 (10) | 0.530 (2) | 0.4324 (10) | 0.050 (5)* | |
C7A | 0.59278 (12) | −0.0999 (3) | 0.40252 (17) | 0.0862 (8) | |
H71A | 0.6374 | −0.0959 | 0.4202 | 0.129* | |
H72A | 0.5849 | −0.1330 | 0.3551 | 0.129* | |
H73A | 0.5739 | −0.1719 | 0.4294 | 0.129* | |
C8A | 0.42141 (11) | 0.2953 (3) | 0.37527 (14) | 0.0735 (7) | |
H81A | 0.4200 | 0.3999 | 0.3917 | 0.110* | |
H82A | 0.3936 | 0.2314 | 0.3954 | 0.110* | |
H83A | 0.4085 | 0.2937 | 0.3258 | 0.110* | |
C9A | 0.45597 (9) | −0.0349 (2) | 0.35823 (10) | 0.0486 (4) | |
C10A | 0.44351 (9) | −0.0687 (2) | 0.28825 (10) | 0.0530 (5) | |
C11A | 0.40221 (11) | −0.1862 (3) | 0.26169 (12) | 0.0675 (6) | |
H11A | 0.3949 | −0.2101 | 0.2148 | 0.081* | |
C12A | 0.37224 (11) | −0.2669 (3) | 0.30552 (15) | 0.0739 (7) | |
H12A | 0.3442 | −0.3459 | 0.2881 | 0.089* | |
C13A | 0.38311 (13) | −0.2325 (3) | 0.37480 (15) | 0.0836 (8) | |
H13A | 0.3618 | −0.2864 | 0.4039 | 0.100* | |
C14A | 0.42545 (12) | −0.1183 (3) | 0.40117 (12) | 0.0724 (7) | |
H14A | 0.4336 | −0.0971 | 0.4484 | 0.087* | |
Cl1B | 0.13764 (4) | 0.28273 (9) | 0.23515 (3) | 0.0901 (2) | |
N1B | 0.16587 (7) | 0.28089 (18) | 0.38869 (8) | 0.0462 (4) | |
O1B | 0.25930 (8) | −0.1717 (2) | 0.47523 (9) | 0.0802 (5) | |
C2B | 0.15079 (8) | 0.1295 (2) | 0.39870 (9) | 0.0460 (4) | |
C3B | 0.20599 (9) | 0.0551 (2) | 0.42895 (9) | 0.0486 (4) | |
C4B | 0.25548 (9) | 0.1668 (2) | 0.43633 (10) | 0.0553 (5) | |
H4B | 0.2977 | 0.1481 | 0.4551 | 0.066* | |
C5B | 0.23064 (9) | 0.3043 (2) | 0.41153 (10) | 0.0524 (5) | |
C6B | 0.21092 (12) | −0.1062 (3) | 0.44840 (11) | 0.0598 (5) | |
H6B | 0.1718 (10) | −0.164 (2) | 0.4390 (10) | 0.053 (6)* | |
C7B | 0.26008 (11) | 0.4580 (3) | 0.40400 (15) | 0.0759 (7) | |
H71B | 0.3037 | 0.4550 | 0.4263 | 0.114* | |
H72B | 0.2389 | 0.5368 | 0.4251 | 0.114* | |
H73B | 0.2565 | 0.4811 | 0.3558 | 0.114* | |
C8B | 0.08521 (10) | 0.0713 (3) | 0.37765 (12) | 0.0617 (5) | |
H81B | 0.0567 | 0.1454 | 0.3907 | 0.093* | |
H82B | 0.0813 | −0.0259 | 0.4002 | 0.093* | |
H83B | 0.0753 | 0.0569 | 0.3284 | 0.093* | |
C9B | 0.12261 (8) | 0.3977 (2) | 0.35786 (10) | 0.0487 (4) | |
C10B | 0.10606 (9) | 0.4111 (3) | 0.28617 (11) | 0.0585 (5) | |
C11B | 0.06506 (11) | 0.5247 (3) | 0.25593 (15) | 0.0768 (7) | |
H11B | 0.0545 | 0.5334 | 0.2080 | 0.092* | |
C12B | 0.04009 (11) | 0.6244 (3) | 0.29674 (19) | 0.0859 (9) | |
H12B | 0.0124 | 0.7013 | 0.2763 | 0.103* | |
C13B | 0.05515 (12) | 0.6134 (3) | 0.36765 (19) | 0.0835 (8) | |
H13B | 0.0373 | 0.6818 | 0.3947 | 0.100* | |
C14B | 0.09717 (11) | 0.4996 (3) | 0.39897 (14) | 0.0675 (6) | |
H14B | 0.1079 | 0.4923 | 0.4470 | 0.081* | |
Cl1C | 0.17611 (4) | −0.19303 (9) | 0.26527 (3) | 0.0955 (3) | |
N1C | 0.16827 (7) | −0.26199 (17) | 0.11563 (8) | 0.0481 (4) | |
O1C | 0.07458 (9) | −0.71643 (19) | 0.03145 (10) | 0.0893 (6) | |
C2C | 0.18305 (9) | −0.4155 (2) | 0.10940 (10) | 0.0486 (4) | |
C3C | 0.12867 (10) | −0.4890 (2) | 0.07585 (10) | 0.0501 (4) | |
C4C | 0.08000 (10) | −0.3756 (2) | 0.06230 (10) | 0.0556 (5) | |
H4C | 0.0385 | −0.3934 | 0.0404 | 0.067* | |
C5C | 0.10458 (9) | −0.2375 (2) | 0.08680 (11) | 0.0536 (5) | |
C6C | 0.12301 (13) | −0.6522 (3) | 0.05957 (12) | 0.0652 (6) | |
H6C | 0.1622 (11) | −0.711 (3) | 0.0724 (11) | 0.066 (7)* | |
C7C | 0.07460 (12) | −0.0827 (3) | 0.08900 (15) | 0.0814 (7) | |
H71C | 0.0324 | −0.0858 | 0.0623 | 0.122* | |
H72C | 0.0984 | −0.0060 | 0.0700 | 0.122* | |
H73C | 0.0736 | −0.0566 | 0.1361 | 0.122* | |
C8C | 0.24734 (11) | −0.4741 (3) | 0.13670 (14) | 0.0711 (6) | |
H81C | 0.2774 | −0.4096 | 0.1203 | 0.107* | |
H82C | 0.2508 | −0.5787 | 0.1211 | 0.107* | |
H83C | 0.2556 | −0.4720 | 0.1864 | 0.107* | |
C9C | 0.21133 (9) | −0.1422 (2) | 0.14413 (10) | 0.0496 (4) | |
C10C | 0.21797 (10) | −0.0969 (2) | 0.21261 (11) | 0.0566 (5) | |
C11C | 0.25785 (11) | 0.0235 (3) | 0.23908 (13) | 0.0700 (6) | |
H11C | 0.2616 | 0.0544 | 0.2849 | 0.084* | |
C12C | 0.29197 (11) | 0.0968 (3) | 0.19669 (15) | 0.0739 (7) | |
H12C | 0.3186 | 0.1785 | 0.2140 | 0.089* | |
C13C | 0.28730 (12) | 0.0515 (3) | 0.12993 (16) | 0.0772 (7) | |
H13C | 0.3115 | 0.1006 | 0.1023 | 0.093* | |
C14C | 0.24679 (11) | −0.0675 (3) | 0.10263 (13) | 0.0664 (6) | |
H14C | 0.2434 | −0.0973 | 0.0567 | 0.080* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1A | 0.1319 (6) | 0.1074 (6) | 0.0542 (3) | −0.0403 (5) | 0.0389 (4) | −0.0091 (3) |
N1A | 0.0496 (9) | 0.0494 (9) | 0.0451 (8) | −0.0045 (7) | 0.0085 (7) | −0.0010 (7) |
O1A | 0.0899 (12) | 0.0714 (11) | 0.0765 (11) | −0.0241 (9) | 0.0072 (9) | −0.0160 (9) |
C2A | 0.0552 (11) | 0.0519 (11) | 0.0418 (9) | −0.0031 (9) | 0.0126 (8) | −0.0047 (8) |
C3A | 0.0593 (11) | 0.0522 (11) | 0.0373 (9) | −0.0082 (9) | 0.0097 (8) | −0.0005 (8) |
C4A | 0.0516 (11) | 0.0610 (12) | 0.0481 (10) | −0.0083 (9) | 0.0052 (8) | 0.0046 (9) |
C5A | 0.0506 (11) | 0.0554 (12) | 0.0528 (11) | 0.0002 (9) | 0.0051 (9) | 0.0064 (9) |
C6A | 0.0732 (15) | 0.0601 (13) | 0.0504 (11) | −0.0079 (12) | 0.0131 (10) | −0.0062 (10) |
C7A | 0.0655 (15) | 0.0616 (15) | 0.123 (2) | 0.0095 (12) | −0.0008 (14) | 0.0029 (15) |
C8A | 0.0593 (13) | 0.0682 (15) | 0.0908 (17) | 0.0043 (11) | 0.0102 (12) | −0.0173 (13) |
C9A | 0.0495 (10) | 0.0484 (10) | 0.0483 (10) | −0.0045 (8) | 0.0109 (8) | −0.0025 (8) |
C10A | 0.0570 (11) | 0.0530 (11) | 0.0498 (10) | −0.0015 (9) | 0.0127 (9) | −0.0039 (9) |
C11A | 0.0712 (14) | 0.0618 (13) | 0.0644 (13) | −0.0025 (11) | 0.0015 (11) | −0.0155 (11) |
C12A | 0.0636 (14) | 0.0547 (13) | 0.0982 (19) | −0.0144 (11) | 0.0038 (13) | −0.0051 (13) |
C13A | 0.0868 (18) | 0.0773 (17) | 0.0906 (19) | −0.0314 (14) | 0.0272 (14) | 0.0045 (15) |
C14A | 0.0894 (17) | 0.0746 (15) | 0.0563 (12) | −0.0244 (13) | 0.0223 (12) | −0.0010 (11) |
Cl1B | 0.1156 (6) | 0.0991 (5) | 0.0580 (3) | 0.0189 (4) | 0.0231 (3) | 0.0101 (3) |
N1B | 0.0425 (8) | 0.0443 (8) | 0.0494 (8) | −0.0015 (6) | 0.0037 (6) | 0.0068 (7) |
O1B | 0.0829 (11) | 0.0671 (10) | 0.0852 (11) | 0.0256 (9) | 0.0044 (9) | 0.0190 (9) |
C2B | 0.0492 (10) | 0.0450 (10) | 0.0425 (9) | −0.0029 (8) | 0.0064 (8) | 0.0048 (8) |
C3B | 0.0527 (11) | 0.0497 (11) | 0.0420 (9) | 0.0047 (9) | 0.0061 (8) | 0.0056 (8) |
C4B | 0.0439 (10) | 0.0607 (12) | 0.0578 (11) | 0.0038 (9) | 0.0015 (9) | 0.0067 (10) |
C5B | 0.0428 (10) | 0.0533 (11) | 0.0580 (11) | −0.0053 (8) | 0.0028 (8) | 0.0038 (9) |
C6B | 0.0710 (14) | 0.0529 (12) | 0.0544 (12) | 0.0059 (11) | 0.0099 (10) | 0.0063 (10) |
C7B | 0.0553 (13) | 0.0595 (14) | 0.107 (2) | −0.0132 (11) | 0.0028 (12) | 0.0106 (13) |
C8B | 0.0549 (12) | 0.0551 (12) | 0.0708 (13) | −0.0080 (10) | 0.0022 (10) | 0.0096 (10) |
C9B | 0.0402 (9) | 0.0444 (10) | 0.0599 (11) | −0.0028 (8) | 0.0063 (8) | 0.0103 (9) |
C10B | 0.0500 (11) | 0.0571 (12) | 0.0662 (13) | −0.0017 (9) | 0.0063 (9) | 0.0165 (10) |
C11B | 0.0612 (14) | 0.0717 (16) | 0.0895 (17) | 0.0040 (12) | −0.0039 (12) | 0.0311 (14) |
C12B | 0.0541 (14) | 0.0587 (15) | 0.138 (3) | 0.0047 (11) | 0.0026 (15) | 0.0330 (17) |
C13B | 0.0649 (15) | 0.0511 (13) | 0.141 (3) | 0.0034 (11) | 0.0350 (16) | −0.0002 (15) |
C14B | 0.0668 (14) | 0.0534 (12) | 0.0846 (16) | 0.0030 (11) | 0.0210 (12) | 0.0010 (12) |
Cl1C | 0.1282 (6) | 0.1010 (5) | 0.0663 (4) | −0.0374 (5) | 0.0415 (4) | −0.0145 (4) |
N1C | 0.0542 (9) | 0.0388 (8) | 0.0518 (9) | 0.0008 (7) | 0.0116 (7) | −0.0053 (7) |
O1C | 0.1110 (14) | 0.0551 (10) | 0.0895 (12) | −0.0281 (10) | −0.0093 (10) | −0.0030 (9) |
C2C | 0.0574 (11) | 0.0394 (9) | 0.0494 (10) | 0.0027 (8) | 0.0115 (8) | −0.0010 (8) |
C3C | 0.0626 (12) | 0.0422 (10) | 0.0454 (10) | −0.0055 (9) | 0.0103 (8) | −0.0006 (8) |
C4C | 0.0532 (11) | 0.0573 (12) | 0.0552 (11) | −0.0032 (9) | 0.0088 (9) | 0.0012 (10) |
C5C | 0.0549 (11) | 0.0489 (11) | 0.0571 (11) | 0.0043 (9) | 0.0117 (9) | −0.0018 (9) |
C6C | 0.0872 (17) | 0.0461 (12) | 0.0585 (13) | −0.0063 (12) | 0.0060 (12) | 0.0009 (10) |
C7C | 0.0771 (16) | 0.0630 (15) | 0.1010 (19) | 0.0215 (12) | 0.0106 (14) | −0.0061 (14) |
C8C | 0.0665 (14) | 0.0513 (12) | 0.0907 (17) | 0.0094 (10) | 0.0042 (12) | −0.0034 (12) |
C9C | 0.0529 (11) | 0.0380 (9) | 0.0591 (11) | −0.0001 (8) | 0.0146 (9) | −0.0067 (8) |
C10C | 0.0622 (12) | 0.0486 (11) | 0.0600 (12) | −0.0029 (9) | 0.0144 (10) | −0.0068 (9) |
C11C | 0.0731 (14) | 0.0558 (13) | 0.0768 (15) | −0.0015 (11) | 0.0047 (12) | −0.0185 (12) |
C12C | 0.0656 (14) | 0.0458 (12) | 0.106 (2) | −0.0073 (10) | 0.0070 (13) | −0.0120 (13) |
C13C | 0.0755 (16) | 0.0544 (13) | 0.109 (2) | −0.0141 (12) | 0.0350 (14) | 0.0001 (14) |
C14C | 0.0816 (15) | 0.0533 (12) | 0.0705 (14) | −0.0076 (11) | 0.0299 (12) | −0.0051 (11) |
Cl1A—C10A | 1.730 (2) | C7B—H73B | 0.96 |
N1A—C2A | 1.366 (2) | C8B—H81B | 0.96 |
N1A—C5A | 1.400 (2) | C8B—H82B | 0.96 |
N1A—C9A | 1.428 (2) | C8B—H83B | 0.96 |
O1A—C6A | 1.214 (3) | C9B—C14B | 1.383 (3) |
C2A—C3A | 1.384 (3) | C9B—C10B | 1.392 (3) |
C2A—C8A | 1.484 (3) | C10B—C11B | 1.375 (3) |
C3A—C4A | 1.419 (3) | C11B—C12B | 1.362 (4) |
C3A—C6A | 1.442 (3) | C11B—H11B | 0.93 |
C4A—C5A | 1.353 (3) | C12B—C13B | 1.374 (4) |
C4A—H4A | 0.93 | C12B—H12B | 0.93 |
C5A—C7A | 1.488 (3) | C13B—C14B | 1.395 (4) |
C6A—H6A | 0.98 (2) | C13B—H13B | 0.93 |
C7A—H71A | 0.96 | C14B—H14B | 0.93 |
C7A—H72A | 0.96 | Cl1C—C10C | 1.723 (2) |
C7A—H73A | 0.96 | N1C—C2C | 1.372 (2) |
C8A—H81A | 0.96 | N1C—C5C | 1.399 (2) |
C8A—H82A | 0.96 | N1C—C9C | 1.429 (2) |
C8A—H83A | 0.96 | O1C—C6C | 1.217 (3) |
C9A—C14A | 1.377 (3) | C2C—C3C | 1.384 (3) |
C9A—C10A | 1.383 (3) | C2C—C8C | 1.478 (3) |
C10A—C11A | 1.382 (3) | C3C—C4C | 1.423 (3) |
C11A—C12A | 1.371 (3) | C3C—C6C | 1.441 (3) |
C11A—H11A | 0.93 | C4C—C5C | 1.352 (3) |
C12A—C13A | 1.372 (4) | C4C—H4C | 0.93 |
C12A—H12A | 0.93 | C5C—C7C | 1.488 (3) |
C13A—C14A | 1.374 (3) | C6C—H6C | 0.98 (2) |
C13A—H13A | 0.93 | C7C—H71C | 0.96 |
C14A—H14A | 0.93 | C7C—H72C | 0.96 |
Cl1B—C10B | 1.727 (2) | C7C—H73C | 0.96 |
N1B—C2B | 1.368 (2) | C8C—H81C | 0.96 |
N1B—C5B | 1.400 (2) | C8C—H82C | 0.96 |
N1B—C9B | 1.425 (2) | C8C—H83C | 0.96 |
O1B—C6B | 1.214 (3) | C9C—C10C | 1.385 (3) |
C2B—C3B | 1.382 (3) | C9C—C14C | 1.389 (3) |
C2B—C8B | 1.486 (3) | C10C—C11C | 1.383 (3) |
C3B—C4B | 1.426 (3) | C11C—C12C | 1.376 (4) |
C3B—C6B | 1.440 (3) | C11C—H11C | 0.93 |
C4B—C5B | 1.351 (3) | C12C—C13C | 1.357 (4) |
C4B—H4B | 0.93 | C12C—H12C | 0.93 |
C5B—C7B | 1.490 (3) | C13C—C14C | 1.386 (3) |
C6B—H6B | 0.97 (2) | C13C—H13C | 0.93 |
C7B—H71B | 0.96 | C14C—H14C | 0.93 |
C7B—H72B | 0.96 | ||
C2A—N1A—C5A | 110.13 (16) | C2B—C8B—H81B | 109.5 |
C2A—N1A—C9A | 125.66 (16) | C2B—C8B—H82B | 109.5 |
C5A—N1A—C9A | 124.20 (16) | H81B—C8B—H82B | 109.5 |
N1A—C2A—C3A | 106.79 (17) | C2B—C8B—H83B | 109.5 |
N1A—C2A—C8A | 121.59 (18) | H81B—C8B—H83B | 109.5 |
C3A—C2A—C8A | 131.6 (2) | H82B—C8B—H83B | 109.5 |
C2A—C3A—C4A | 107.79 (17) | C14B—C9B—C10B | 119.44 (19) |
C2A—C3A—C6A | 124.9 (2) | C14B—C9B—N1B | 120.25 (18) |
C4A—C3A—C6A | 127.3 (2) | C10B—C9B—N1B | 120.31 (18) |
C5A—C4A—C3A | 108.33 (18) | C11B—C10B—C9B | 120.8 (2) |
C5A—C4A—H4A | 125.8 | C11B—C10B—Cl1B | 120.04 (19) |
C3A—C4A—H4A | 125.8 | C9B—C10B—Cl1B | 119.19 (15) |
C4A—C5A—N1A | 106.95 (18) | C12B—C11B—C10B | 119.5 (2) |
C4A—C5A—C7A | 131.98 (19) | C12B—C11B—H11B | 120.3 |
N1A—C5A—C7A | 121.06 (18) | C10B—C11B—H11B | 120.3 |
O1A—C6A—C3A | 125.2 (2) | C11B—C12B—C13B | 121.1 (2) |
O1A—C6A—H6A | 119.5 (12) | C11B—C12B—H12B | 119.4 |
C3A—C6A—H6A | 115.3 (12) | C13B—C12B—H12B | 119.4 |
C5A—C7A—H71A | 109.5 | C12B—C13B—C14B | 120.0 (3) |
C5A—C7A—H72A | 109.5 | C12B—C13B—H13B | 120.0 |
H71A—C7A—H72A | 109.5 | C14B—C13B—H13B | 120.0 |
C5A—C7A—H73A | 109.5 | C9B—C14B—C13B | 119.2 (2) |
H71A—C7A—H73A | 109.5 | C9B—C14B—H14B | 120.4 |
H72A—C7A—H73A | 109.5 | C13B—C14B—H14B | 120.4 |
C2A—C8A—H81A | 109.5 | C2C—N1C—C5C | 109.75 (16) |
C2A—C8A—H82A | 109.5 | C2C—N1C—C9C | 125.83 (16) |
H81A—C8A—H82A | 109.5 | C5C—N1C—C9C | 124.36 (15) |
C2A—C8A—H83A | 109.5 | N1C—C2C—C3C | 106.98 (17) |
H81A—C8A—H83A | 109.5 | N1C—C2C—C8C | 121.10 (17) |
H82A—C8A—H83A | 109.5 | C3C—C2C—C8C | 131.92 (18) |
C14A—C9A—C10A | 118.86 (19) | C2C—C3C—C4C | 107.68 (17) |
C14A—C9A—N1A | 120.11 (17) | C2C—C3C—C6C | 125.4 (2) |
C10A—C9A—N1A | 121.02 (17) | C4C—C3C—C6C | 126.9 (2) |
C11A—C10A—C9A | 120.90 (19) | C5C—C4C—C3C | 108.23 (18) |
C11A—C10A—Cl1A | 120.49 (16) | C5C—C4C—H4C | 125.9 |
C9A—C10A—Cl1A | 118.61 (15) | C3C—C4C—H4C | 125.9 |
C12A—C11A—C10A | 119.0 (2) | C4C—C5C—N1C | 107.36 (17) |
C12A—C11A—H11A | 120.5 | C4C—C5C—C7C | 131.0 (2) |
C10A—C11A—H11A | 120.5 | N1C—C5C—C7C | 121.62 (19) |
C13A—C12A—C11A | 120.7 (2) | O1C—C6C—C3C | 124.8 (2) |
C13A—C12A—H12A | 119.7 | O1C—C6C—H6C | 120.7 (14) |
C11A—C12A—H12A | 119.7 | C3C—C6C—H6C | 114.5 (14) |
C12A—C13A—C14A | 120.0 (2) | C5C—C7C—H71C | 109.5 |
C12A—C13A—H13A | 120.0 | C5C—C7C—H72C | 109.5 |
C14A—C13A—H13A | 120.0 | H71C—C7C—H72C | 109.5 |
C13A—C14A—C9A | 120.5 (2) | C5C—C7C—H73C | 109.5 |
C13A—C14A—H14A | 119.7 | H71C—C7C—H73C | 109.5 |
C9A—C14A—H14A | 119.7 | H72C—C7C—H73C | 109.5 |
C2B—N1B—C5B | 110.12 (15) | C2C—C8C—H81C | 109.5 |
C2B—N1B—C9B | 125.34 (15) | C2C—C8C—H82C | 109.5 |
C5B—N1B—C9B | 124.51 (15) | H81C—C8C—H82C | 109.5 |
N1B—C2B—C3B | 107.03 (16) | C2C—C8C—H83C | 109.5 |
N1B—C2B—C8B | 121.60 (17) | H81C—C8C—H83C | 109.5 |
C3B—C2B—C8B | 131.37 (18) | H82C—C8C—H83C | 109.5 |
C2B—C3B—C4B | 107.43 (17) | C10C—C9C—C14C | 118.91 (19) |
C2B—C3B—C6B | 125.01 (19) | C10C—C9C—N1C | 121.22 (17) |
C4B—C3B—C6B | 127.56 (19) | C14C—C9C—N1C | 119.87 (18) |
C5B—C4B—C3B | 108.50 (17) | C11C—C10C—C9C | 120.9 (2) |
C5B—C4B—H4B | 125.7 | C11C—C10C—Cl1C | 119.85 (18) |
C3B—C4B—H4B | 125.7 | C9C—C10C—Cl1C | 119.27 (15) |
C4B—C5B—N1B | 106.91 (17) | C12C—C11C—C10C | 119.1 (2) |
C4B—C5B—C7B | 131.86 (18) | C12C—C11C—H11C | 120.5 |
N1B—C5B—C7B | 121.19 (17) | C10C—C11C—H11C | 120.5 |
O1B—C6B—C3B | 125.1 (2) | C13C—C12C—C11C | 120.9 (2) |
O1B—C6B—H6B | 119.5 (12) | C13C—C12C—H12C | 119.6 |
C3B—C6B—H6B | 115.3 (12) | C11C—C12C—H12C | 119.6 |
C5B—C7B—H71B | 109.5 | C12C—C13C—C14C | 120.5 (2) |
C5B—C7B—H72B | 109.5 | C12C—C13C—H13C | 119.8 |
H71B—C7B—H72B | 109.5 | C14C—C13C—H13C | 119.8 |
C5B—C7B—H73B | 109.5 | C13C—C14C—C9C | 119.7 (2) |
H71B—C7B—H73B | 109.5 | C13C—C14C—H14C | 120.1 |
H72B—C7B—H73B | 109.5 | C9C—C14C—H14C | 120.1 |
C5A—N1A—C2A—C3A | −1.1 (2) | C4B—C3B—C6B—O1B | 0.7 (4) |
C9A—N1A—C2A—C3A | −179.83 (16) | C2B—N1B—C9B—C14B | 97.6 (2) |
C5A—N1A—C2A—C8A | 177.97 (19) | C5B—N1B—C9B—C14B | −84.1 (2) |
C9A—N1A—C2A—C8A | −0.8 (3) | C2B—N1B—C9B—C10B | −82.9 (2) |
N1A—C2A—C3A—C4A | 0.9 (2) | C5B—N1B—C9B—C10B | 95.3 (2) |
C8A—C2A—C3A—C4A | −178.0 (2) | C14B—C9B—C10B—C11B | 0.3 (3) |
N1A—C2A—C3A—C6A | −178.97 (18) | N1B—C9B—C10B—C11B | −179.10 (18) |
C8A—C2A—C3A—C6A | 2.1 (3) | C14B—C9B—C10B—Cl1B | −179.60 (16) |
C2A—C3A—C4A—C5A | −0.4 (2) | N1B—C9B—C10B—Cl1B | 1.0 (2) |
C6A—C3A—C4A—C5A | 179.47 (19) | C9B—C10B—C11B—C12B | −0.5 (3) |
C3A—C4A—C5A—N1A | −0.3 (2) | Cl1B—C10B—C11B—C12B | 179.47 (19) |
C3A—C4A—C5A—C7A | −179.2 (2) | C10B—C11B—C12B—C13B | 0.0 (4) |
C2A—N1A—C5A—C4A | 0.8 (2) | C11B—C12B—C13B—C14B | 0.7 (4) |
C9A—N1A—C5A—C4A | 179.63 (16) | C10B—C9B—C14B—C13B | 0.3 (3) |
C2A—N1A—C5A—C7A | 179.9 (2) | N1B—C9B—C14B—C13B | 179.71 (18) |
C9A—N1A—C5A—C7A | −1.3 (3) | C12B—C13B—C14B—C9B | −0.8 (4) |
C2A—C3A—C6A—O1A | 175.8 (2) | C5C—N1C—C2C—C3C | 0.6 (2) |
C4A—C3A—C6A—O1A | −4.0 (3) | C9C—N1C—C2C—C3C | −176.74 (17) |
C2A—N1A—C9A—C14A | −88.6 (3) | C5C—N1C—C2C—C8C | −179.01 (19) |
C5A—N1A—C9A—C14A | 92.8 (3) | C9C—N1C—C2C—C8C | 3.7 (3) |
C2A—N1A—C9A—C10A | 92.4 (2) | N1C—C2C—C3C—C4C | −0.5 (2) |
C5A—N1A—C9A—C10A | −86.2 (2) | C8C—C2C—C3C—C4C | 179.0 (2) |
C14A—C9A—C10A—C11A | −1.4 (3) | N1C—C2C—C3C—C6C | −179.12 (19) |
N1A—C9A—C10A—C11A | 177.62 (19) | C8C—C2C—C3C—C6C | 0.4 (4) |
C14A—C9A—C10A—Cl1A | 178.34 (18) | C2C—C3C—C4C—C5C | 0.2 (2) |
N1A—C9A—C10A—Cl1A | −2.7 (3) | C6C—C3C—C4C—C5C | 178.8 (2) |
C9A—C10A—C11A—C12A | 1.7 (3) | C3C—C4C—C5C—N1C | 0.1 (2) |
Cl1A—C10A—C11A—C12A | −178.04 (18) | C3C—C4C—C5C—C7C | −177.3 (2) |
C10A—C11A—C12A—C13A | −0.3 (4) | C2C—N1C—C5C—C4C | −0.4 (2) |
C11A—C12A—C13A—C14A | −1.4 (4) | C9C—N1C—C5C—C4C | 176.94 (17) |
C12A—C13A—C14A—C9A | 1.7 (4) | C2C—N1C—C5C—C7C | 177.2 (2) |
C10A—C9A—C14A—C13A | −0.3 (4) | C9C—N1C—C5C—C7C | −5.4 (3) |
N1A—C9A—C14A—C13A | −179.3 (2) | C2C—C3C—C6C—O1C | 178.2 (2) |
C5B—N1B—C2B—C3B | 0.7 (2) | C4C—C3C—C6C—O1C | −0.1 (4) |
C9B—N1B—C2B—C3B | 179.16 (17) | C2C—N1C—C9C—C10C | −96.2 (2) |
C5B—N1B—C2B—C8B | −178.68 (18) | C5C—N1C—C9C—C10C | 86.9 (2) |
C9B—N1B—C2B—C8B | −0.2 (3) | C2C—N1C—C9C—C14C | 84.7 (3) |
N1B—C2B—C3B—C4B | −0.6 (2) | C5C—N1C—C9C—C14C | −92.2 (2) |
C8B—C2B—C3B—C4B | 178.7 (2) | C14C—C9C—C10C—C11C | 1.8 (3) |
N1B—C2B—C3B—C6B | 179.73 (18) | N1C—C9C—C10C—C11C | −177.32 (19) |
C8B—C2B—C3B—C6B | −1.0 (3) | C14C—C9C—C10C—Cl1C | −177.90 (17) |
C2B—C3B—C4B—C5B | 0.3 (2) | N1C—C9C—C10C—Cl1C | 3.0 (3) |
C6B—C3B—C4B—C5B | 179.9 (2) | C9C—C10C—C11C—C12C | −1.1 (3) |
C3B—C4B—C5B—N1B | 0.2 (2) | Cl1C—C10C—C11C—C12C | 178.61 (18) |
C3B—C4B—C5B—C7B | −177.6 (2) | C10C—C11C—C12C—C13C | −0.6 (4) |
C2B—N1B—C5B—C4B | −0.5 (2) | C11C—C12C—C13C—C14C | 1.6 (4) |
C9B—N1B—C5B—C4B | −179.01 (18) | C12C—C13C—C14C—C9C | −0.8 (4) |
C2B—N1B—C5B—C7B | 177.5 (2) | C10C—C9C—C14C—C13C | −0.8 (3) |
C9B—N1B—C5B—C7B | −0.9 (3) | N1C—C9C—C14C—C13C | 178.28 (19) |
C2B—C3B—C6B—O1B | −179.7 (2) |
Experimental details
Crystal data | |
Chemical formula | C13H12ClNO |
Mr | 233.69 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 21.6815 (3), 8.6127 (1), 19.7231 (2) |
β (°) | 101.6257 (5) |
V (Å3) | 3607.46 (8) |
Z | 12 |
Radiation type | Mo Kα |
µ (mm−1) | 0.30 |
Crystal size (mm) | 0.35 × 0.35 × 0.15 |
Data collection | |
Diffractometer | Nonius KappaCCD area-detector diffractometer |
Absorption correction | Multi-scan DENZO-SMN (Otwinowski & Minor, 1997) |
Tmin, Tmax | 0.902, 0.957 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 43063, 8109, 5495 |
Rint | 0.040 |
(sin θ/λ)max (Å−1) | 0.648 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.056, 0.159, 1.02 |
No. of reflections | 8109 |
No. of parameters | 451 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.32, −0.41 |
Computer programs: COLLECT (Nonius, 2000), DENZO–SMN (Otwinowski & Minor, 1997), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), PLATON (Spek, 2003).
N1A—C2A | 1.366 (2) | C3B—C4B | 1.426 (3) |
N1A—C5A | 1.400 (2) | C3B—C6B | 1.440 (3) |
O1A—C6A | 1.214 (3) | C4B—C5B | 1.351 (3) |
C2A—C3A | 1.384 (3) | N1C—C2C | 1.372 (2) |
C3A—C4A | 1.419 (3) | N1C—C5C | 1.399 (2) |
C3A—C6A | 1.442 (3) | O1C—C6C | 1.217 (3) |
C4A—C5A | 1.353 (3) | C2C—C3C | 1.384 (3) |
N1B—C2B | 1.368 (2) | C3C—C4C | 1.423 (3) |
N1B—C5B | 1.400 (2) | C3C—C6C | 1.441 (3) |
O1B—C6B | 1.214 (3) | C4C—C5C | 1.352 (3) |
C2B—C3B | 1.382 (3) | ||
C2A—N1A—C5A | 110.13 (16) | C5B—N1B—C9B | 124.51 (15) |
C2A—N1A—C9A | 125.66 (16) | C2C—N1C—C5C | 109.75 (16) |
C5A—N1A—C9A | 124.20 (16) | C2C—N1C—C9C | 125.83 (16) |
C2B—N1B—C5B | 110.12 (15) | C5C—N1C—C9C | 124.36 (15) |
C2B—N1B—C9B | 125.34 (15) |
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The substituted pyrrole ring, which is known to be an important unit in many kinds of useful π-electron systems (Evans, 1990; Yanai et al., 2000; Takeda et al., 2001), forms part of our research on substituted heterocyclic compounds (Jukić et al., 1999 & 2003). The synthesis of pyrrole rings has remained an extremely attractive domain in heterocyclic chemistry, as they constitute the core unit of many natural products (Fürstner et al., 2002) and serve as the building blocks for porphyrin synthesis (Dolušić et al., 2003; Guo et al., 2003; Naik et al., 2003). The present study forms part of our continuing interest in the synthesis, stereochemistry and structural analysis of N-aryl- and N-heteroaryl-2,5-dimethylpyrrole-3-carbaldehyde (Vorkapić-Furač et al., 1992) and in their usage as corrosion inhibitors of iron (Stupnišek-Lisac et al., 1988; Stupnišek-Lisac et al., 1992) or as synthetic plant growth factors (cytokinins; Bajrović et al., 1993).
The asymmetric unit of the title compound, (I), (Fig. 1) contains three crystallographically independent molecules, viz. A, B and C. The bond lengths in their pyrrole rings and attached aldehyde groups agree within standard uncertainties (Table 1), and the bond lengths in the rest of the molecules differ only slightly. The biggest conformational difference between these three molecules was observed in the orientation of the phenyl rings with respect to the pyrrole rings, the C2–N1–C9–C10 torsion angles being 92.4 (2), −82.9 (2) and −96.2 (2)°, respectively.
The aldehyde groups are coplanar with the pyrrole rings to which they are attached; the C4—C3—C6—O1 torsion angles are −4.0 (3), 0.7 (4) and −0.1 (4)°, respectively. A coplanar arrangement of the aldehyde groups allows the extension of the π conjugation of the ring over the carbonyl groups. The π-electron transfer is substantiated by the deviation of the pyrrole-ring geometry. The C2—C3 bond is slightly elongated compared with the average value for Csp2═Csp2 bond distance in 1H-pyrroles (1.375 Å; Allen et al., 1987) and noticeably longer than the C4—C5 bond. Because of the C2—C3 and C4—C5 bond-length deviations, the N1—C5 bond is noticeably longer than the N1—C2 bond and the corresponding Csp2—N(3) bond distance in 1H-pyrroles (1.372 Å; Allen et al., 1987). The efficient π-systems spread from the pyrrole ring to the carbonyl group is confirmed by the shortening of the C3—C6 bond [Csp2—Csp2(conjugated) = 1.455 Å; Allen et al., 1987]. A survey the Cambridge Structural Database (Allen, 2002) revealed three structures that have an aldehyde group at the 3-position of the pyrrole ring (Conde et al., 1979; de la Figuera Gomez et al., 1985; Lokaj et al., 2001). In these structures, the pyrrole-ring geometry is significantly different because of the influence of the other ring substituents. The structure of (I) is the first example of an N-(o-chlorophenyl)-substituted pyrrole ring.
The sum of the angles around atom N1 is 360° (Table 1), assuming that the N atoms, whose lone electron pairs are included in the aromatic systems, posses an sp2 planar arrangement. Consequently, the pyrrole rings are planar, and the largest observed deviation from their mean planes is 0.006 (2) Å for atom C2 in molecule A. The phenyl rings are almost perpendicular to the pyrrole rings [the dihedral angles are 86.9 (1), 83.8 (1) and 85.7 (1)°] and thus are not favourably disposed for inter-ring conjugation. Furthermore, the pyrrole and phenyl rings of molecules A and C are almost parallel to each other, the dihedral angles being 6.4 (1) and 7.0 (1)°, respectively.
In the crystal structure, two independent molecules of (I) form dimers via intermolecular C4A—H4A···O1Bi hydrogen bonds [symmetry code (i): 1 − x, −y, 1 − z]. The D···A and H···A distances are 3.400 (3) and 2.53 Å, and the D–H···A angle is 157° (Fig. 2). We found molecules linked by such Cpyrrole—H···O(═CH) hydrogen bonds in only one structure (Adams et al., 1986). Surprisingly, molecule C is completely isolated and does not participate in hydrogen bonding. Its shortest intermolecular contacts are H14C···O1Bi and H72C···O1Cii [symmetry codes (i): x, −1/2 − y, −1/2 + z; (ii): x, 1 + y, z], with distances of 2.62 and 2.63 Å, respectively. The phenyl and pyrrole rings of two neighbouring symmetry-related A molecules are perpendicularly oriented. Such molecular packing leads to C—H···π interaction between the phenyl H14A atom and the pyrrole ring, with an H···centroidi distance of 2.85 Å and C—H···π angle of 155° [symmetry code (i): 1 − x, −y, 1 − z]. In fact, the H14A···C4A distance [2.70 Å] is shorter than the distance between the H atom and the pyrrole ring centroid. The second shortest H···C contact is that to atom C5A [2.87 Å], and all other H···C distances are larger than 3.05 Å. According to these observations, the C—H bond points more in the directions of? the C4A—C5A bond of the pyrrole ring than the ring as a whole (centroid). These C—H···π interactions connect hydrogen-bonded dimers in the ac plane.