| Literature DB >> 21577945 |
Zahid Shafiq, Muhammad Yaqub, M Nawaz Tahir, Mian Hasnain Nawaz, M Saeed Iqbal.
Abstract
The title compound, C(7)H(8)N(2)O(2), is almost planar (r.m.s. deviation for non-H atoms = 0.029 Å). In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds generate an R(2) (2)(8) ring motif.Entities:
Year: 2009 PMID: 21577945 PMCID: PMC2970214 DOI: 10.1107/S1600536809037064
Source DB: PubMed Journal: Acta Crystallogr Sect E Struct Rep Online ISSN: 1600-5368
| C7H8N2O2 | |
| Orthorhombic, | Mo |
| Hall symbol: -P 2ac 2ab | Cell parameters from 1864 reflections |
| θ = 2.7–25.5° | |
| µ = 0.10 mm−1 | |
| Cut needle, brown | |
| 0.25 × 0.15 × 0.13 mm |
| Bruker Kappa APEXII CCD diffractometer | 1403 independent reflections |
| Radiation source: fine-focus sealed tube | 655 reflections with |
| graphite | |
| Detector resolution: 7.80 pixels mm-1 | θmax = 25.5°, θmin = 2.7° |
| ω scans | |
| Absorption correction: multi-scan ( | |
| 7485 measured reflections |
| Refinement on | Primary atom site location: structure-invariant direct methods |
| Least-squares matrix: full | Secondary atom site location: difference Fourier map |
| Hydrogen site location: inferred from neighbouring sites | |
| H-atom parameters constrained | |
| 1403 reflections | (Δ/σ)max < 0.001 |
| 101 parameters | Δρmax = 0.12 e Å−3 |
| 0 restraints | Δρmin = −0.16 e Å−3 |
| Geometry. Bond distances, angles |
| Refinement. Refinement of |
| O1 | 0.56771 (16) | 0.2958 (2) | 0.15544 (8) | 0.0550 (7) | |
| O2 | 0.66434 (16) | 1.0759 (3) | 0.01153 (9) | 0.0665 (8) | |
| N1 | 0.5699 (2) | 0.6414 (3) | 0.08604 (10) | 0.0486 (8) | |
| N2 | 0.56384 (19) | 0.8059 (3) | 0.04784 (10) | 0.0497 (8) | |
| C1 | 0.5376 (3) | 0.1184 (4) | 0.18332 (14) | 0.0602 (11) | |
| C2 | 0.4218 (3) | 0.0664 (4) | 0.16579 (15) | 0.0717 (14) | |
| C3 | 0.3762 (3) | 0.2130 (4) | 0.12461 (15) | 0.0641 (11) | |
| C4 | 0.4667 (2) | 0.3504 (4) | 0.11942 (12) | 0.0481 (10) | |
| C5 | 0.4735 (2) | 0.5290 (4) | 0.08350 (13) | 0.0501 (10) | |
| C6 | 0.6618 (2) | 0.9277 (4) | 0.04483 (14) | 0.0542 (11) | |
| C7 | 0.6371 (3) | 0.0296 (4) | 0.22318 (15) | 0.0950 (16) | |
| H2 | 0.37892 | −0.04640 | 0.17850 | 0.0858* | |
| H2A | 0.49724 | 0.82967 | 0.02609 | 0.0596* | |
| H3 | 0.29823 | 0.21455 | 0.10475 | 0.0770* | |
| H5 | 0.40630 | 0.56423 | 0.05772 | 0.0599* | |
| H6 | 0.73203 | 0.89887 | 0.06930 | 0.0651* | |
| H7A | 0.61090 | −0.09910 | 0.23690 | 0.1421* | |
| H7B | 0.71316 | 0.01834 | 0.19904 | 0.1421* | |
| H7C | 0.65168 | 0.11181 | 0.25943 | 0.1421* |
| O1 | 0.0546 (12) | 0.0537 (12) | 0.0566 (13) | −0.0005 (9) | 0.0025 (11) | 0.0096 (10) |
| O2 | 0.0620 (14) | 0.0531 (12) | 0.0845 (17) | −0.0070 (9) | −0.0148 (11) | 0.0163 (11) |
| N1 | 0.0461 (14) | 0.0486 (13) | 0.0510 (16) | 0.0081 (12) | 0.0010 (12) | 0.0037 (12) |
| N2 | 0.0408 (13) | 0.0512 (13) | 0.0570 (16) | 0.0048 (12) | −0.0071 (12) | 0.0094 (12) |
| C1 | 0.074 (2) | 0.0447 (18) | 0.062 (2) | 0.0016 (16) | 0.0148 (19) | 0.0060 (16) |
| C2 | 0.080 (2) | 0.054 (2) | 0.081 (3) | −0.0146 (18) | 0.025 (2) | −0.0025 (17) |
| C3 | 0.0533 (19) | 0.068 (2) | 0.071 (2) | −0.0095 (17) | 0.0073 (17) | −0.0096 (18) |
| C4 | 0.0415 (16) | 0.0546 (19) | 0.0483 (19) | 0.0013 (15) | 0.0047 (14) | −0.0011 (15) |
| C5 | 0.0416 (16) | 0.0567 (18) | 0.052 (2) | 0.0088 (14) | −0.0007 (14) | 0.0003 (15) |
| C6 | 0.0454 (18) | 0.0562 (18) | 0.061 (2) | 0.0042 (15) | −0.0088 (16) | −0.0033 (17) |
| C7 | 0.116 (3) | 0.081 (2) | 0.088 (3) | 0.018 (2) | −0.004 (2) | 0.031 (2) |
| O1—C1 | 1.377 (3) | C3—C4 | 1.344 (4) |
| O1—C4 | 1.368 (3) | C4—C5 | 1.430 (4) |
| O2—C6 | 1.227 (3) | C2—H2 | 0.9300 |
| N1—N2 | 1.378 (3) | C3—H3 | 0.9300 |
| N1—C5 | 1.279 (3) | C5—H5 | 0.9300 |
| N2—C6 | 1.331 (3) | C6—H6 | 0.9300 |
| N2—H2A | 0.8600 | C7—H7A | 0.9600 |
| C1—C2 | 1.334 (4) | C7—H7B | 0.9600 |
| C1—C7 | 1.481 (4) | C7—H7C | 0.9600 |
| C2—C3 | 1.407 (4) | ||
| O1···N1 | 2.763 (3) | C6···N1i | 3.318 (3) |
| O2···N1i | 3.268 (3) | C6···C1iv | 3.461 (4) |
| O2···N2ii | 2.848 (3) | C6···O2iii | 3.099 (3) |
| O2···C6i | 3.099 (3) | C1···H7Avii | 3.0000 |
| O1···H6iii | 2.8900 | C2···H7Avii | 3.0800 |
| O2···H2Aii | 2.0000 | C6···H2Aii | 2.8000 |
| O2···H6i | 2.7400 | H2A···H5 | 2.1500 |
| N1···O1 | 2.763 (3) | H2A···O2ii | 2.0000 |
| N1···O2iii | 3.268 (3) | H2A···C6ii | 2.8000 |
| N1···C6iii | 3.318 (3) | H2A···H2Aii | 2.5600 |
| N2···C2iv | 3.408 (4) | H5···H2A | 2.1500 |
| N2···O2ii | 2.848 (3) | H6···O1i | 2.8900 |
| N1···H6iii | 2.7000 | H6···O2iii | 2.7400 |
| C1···C6v | 3.461 (4) | H6···N1i | 2.7000 |
| C2···N2v | 3.408 (4) | H7A···C1viii | 3.0000 |
| C5···C5vi | 3.595 (4) | H7A···C2viii | 3.0800 |
| C1—O1—C4 | 106.9 (2) | C1—C2—H2 | 126.00 |
| N2—N1—C5 | 114.8 (2) | C3—C2—H2 | 126.00 |
| N1—N2—C6 | 119.5 (2) | C2—C3—H3 | 127.00 |
| N1—N2—H2A | 120.00 | C4—C3—H3 | 127.00 |
| C6—N2—H2A | 120.00 | N1—C5—H5 | 119.00 |
| C2—C1—C7 | 135.3 (3) | C4—C5—H5 | 119.00 |
| O1—C1—C2 | 109.1 (2) | O2—C6—H6 | 118.00 |
| O1—C1—C7 | 115.6 (2) | N2—C6—H6 | 118.00 |
| C1—C2—C3 | 107.7 (3) | C1—C7—H7A | 109.00 |
| C2—C3—C4 | 107.0 (3) | C1—C7—H7B | 109.00 |
| O1—C4—C5 | 119.0 (2) | C1—C7—H7C | 109.00 |
| O1—C4—C3 | 109.3 (2) | H7A—C7—H7B | 109.00 |
| C3—C4—C5 | 131.7 (2) | H7A—C7—H7C | 109.00 |
| N1—C5—C4 | 121.5 (2) | H7B—C7—H7C | 110.00 |
| O2—C6—N2 | 123.5 (2) | ||
| C4—O1—C1—C2 | −0.7 (3) | O1—C1—C2—C3 | 0.9 (3) |
| C4—O1—C1—C7 | 178.2 (2) | C7—C1—C2—C3 | −177.7 (3) |
| C1—O1—C4—C3 | 0.2 (3) | C1—C2—C3—C4 | −0.7 (4) |
| C1—O1—C4—C5 | −178.5 (2) | C2—C3—C4—O1 | 0.3 (3) |
| C5—N1—N2—C6 | −177.0 (2) | C2—C3—C4—C5 | 178.8 (3) |
| N2—N1—C5—C4 | 178.7 (2) | O1—C4—C5—N1 | −2.4 (4) |
| N1—N2—C6—O2 | 179.2 (2) | C3—C4—C5—N1 | 179.2 (3) |
| H··· | ||||
| N2—H2A···O2ii | 0.86 | 2.00 | 2.848 (3) | 169 |
Hydrogen-bond geometry (Å, °)
| H⋯ | ||||
|---|---|---|---|---|
| N2—H2 | 0.86 | 2.00 | 2.848 (3) | 169 |
Symmetry code: (i) .