| Literature DB >> 25553044 |
Gamal A El-Hiti1, Keith Smith2, Amany S Hegazy2, Mohammed B Alshammari3, Benson M Kariuki2.
Abstract
The title compound, C9H8N2O, is almost planar, with the C atom of the meth-oxy group deviating from the mean plane of the quinazoline ring system (r.m.s. deviation = 0.011 Å) by 0.068 (4) Å. In the crystal, mol-ecules form π-π stacks parallel to the b-axis direction [centroid-centroid separation = 3.5140 (18) Å], leading to a herringbone packing arrangement.Entities:
Keywords: 4-methoxyquinazoline; crystal structure; herringbone packing; quinazoline derivatives; π–π stacks
Year: 2014 PMID: 25553044 PMCID: PMC4257374 DOI: 10.1107/S1600536814025082
Source DB: PubMed Journal: Acta Crystallogr Sect E Struct Rep Online ISSN: 1600-5368
| C9H8N2O | |
| Monoclinic, | Cu |
| Cell parameters from 1311 reflections | |
| θ = 3.3–67.7° | |
| µ = 0.77 mm−1 | |
| β = 91.754 (8)° | |
| Needle, colourless | |
| 0.57 × 0.12 × 0.08 mm |
| Agilent SuperNova (Dual, Cu at zero, Atlas) diffractometer | 1311 reflections with |
| ω scans | |
| Absorption correction: gaussian ( | θmax = 74.6°, θmin = 3.3° |
| 2166 measured reflections | |
| 1435 independent reflections |
| Refinement on | 1 restraint |
| Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
| H-atom parameters constrained | |
| (Δ/σ)max < 0.001 | |
| 1435 reflections | Δρmax = 0.24 e Å−3 |
| 110 parameters | Δρmin = −0.23 e Å−3 |
| Experimental. Absorption correction: CrysAlisPro, Agilent Technologies, Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET) (compiled Mar 27 2014,17:12:48) Numerical absorption correction based on gaussian integration over a multifaceted crystal model Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
| 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. |
| C1 | −0.1179 (5) | 0.8736 (9) | 0.7198 (2) | 0.0403 (8) | |
| H1 | −0.2391 | 0.7831 | 0.7078 | 0.048* | |
| C2 | 0.1829 (4) | 0.9515 (7) | 0.6650 (2) | 0.0330 (7) | |
| C3 | 0.2338 (4) | 1.1283 (7) | 0.7527 (2) | 0.0330 (7) | |
| C4 | 0.0855 (4) | 1.1608 (7) | 0.8208 (2) | 0.0349 (7) | |
| C5 | 0.1265 (5) | 1.3290 (8) | 0.9096 (3) | 0.0426 (8) | |
| H5 | 0.0308 | 1.3526 | 0.9554 | 0.051* | |
| C6 | 0.3034 (5) | 1.4570 (8) | 0.9292 (2) | 0.0431 (8) | |
| H6 | 0.3276 | 1.5675 | 0.9883 | 0.052* | |
| C7 | 0.4520 (5) | 1.4246 (10) | 0.8608 (3) | 0.0411 (7) | |
| H7 | 0.5731 | 1.5127 | 0.8751 | 0.049* | |
| C8 | 0.4169 (5) | 1.2640 (7) | 0.7739 (2) | 0.0364 (7) | |
| H8 | 0.5138 | 1.2440 | 0.7287 | 0.044* | |
| C9 | 0.2674 (5) | 0.7530 (9) | 0.5079 (3) | 0.0433 (8) | |
| H9A | 0.1669 | 0.8757 | 0.4745 | 0.065* | |
| H9B | 0.2226 | 0.5340 | 0.5215 | 0.065* | |
| H9C | 0.3771 | 0.7410 | 0.4669 | 0.065* | |
| N1 | −0.0945 (4) | 1.0312 (7) | 0.8028 (2) | 0.0412 (7) | |
| N2 | 0.0121 (4) | 0.8237 (6) | 0.6479 (2) | 0.0378 (7) | |
| O1 | 0.3208 (3) | 0.9159 (6) | 0.59930 (16) | 0.0381 (6) |
| C1 | 0.0293 (13) | 0.0351 (16) | 0.0562 (19) | −0.0019 (13) | −0.0033 (12) | 0.0037 (15) |
| C2 | 0.0334 (14) | 0.0278 (15) | 0.0374 (15) | 0.0007 (13) | −0.0059 (11) | 0.0054 (12) |
| C3 | 0.0310 (14) | 0.0268 (14) | 0.0408 (15) | 0.0051 (11) | −0.0036 (12) | 0.0073 (12) |
| C4 | 0.0356 (16) | 0.0283 (15) | 0.0405 (16) | 0.0033 (13) | −0.0020 (12) | 0.0071 (13) |
| C5 | 0.0473 (18) | 0.0386 (17) | 0.0423 (18) | 0.0053 (15) | 0.0052 (14) | 0.0023 (15) |
| C6 | 0.0528 (19) | 0.0364 (18) | 0.0396 (17) | 0.0030 (15) | −0.0075 (14) | −0.0008 (14) |
| C7 | 0.0367 (14) | 0.0373 (16) | 0.0486 (17) | 0.0006 (14) | −0.0104 (12) | 0.0020 (14) |
| C8 | 0.0327 (14) | 0.0346 (16) | 0.0416 (18) | 0.0033 (13) | −0.0051 (12) | 0.0057 (14) |
| C9 | 0.0445 (17) | 0.0437 (18) | 0.0414 (17) | 0.0051 (16) | −0.0052 (13) | −0.0020 (14) |
| N1 | 0.0336 (13) | 0.0372 (14) | 0.0528 (17) | −0.0001 (11) | 0.0023 (11) | 0.0013 (13) |
| N2 | 0.0346 (13) | 0.0336 (14) | 0.0446 (14) | −0.0001 (10) | −0.0084 (11) | 0.0044 (11) |
| O1 | 0.0346 (10) | 0.0430 (13) | 0.0367 (11) | −0.0004 (11) | −0.0016 (8) | −0.0004 (10) |
| C1—N1 | 1.302 (4) | C5—H5 | 0.9300 |
| C1—N2 | 1.366 (4) | C6—C7 | 1.417 (5) |
| C1—H1 | 0.9300 | C6—H6 | 0.9300 |
| C2—N2 | 1.311 (4) | C7—C8 | 1.363 (5) |
| C2—O1 | 1.338 (4) | C7—H7 | 0.9300 |
| C2—C3 | 1.425 (4) | C8—H8 | 0.9300 |
| C3—C8 | 1.409 (4) | C9—O1 | 1.445 (4) |
| C3—C4 | 1.413 (4) | C9—H9A | 0.9600 |
| C4—N1 | 1.373 (4) | C9—H9B | 0.9600 |
| C4—C5 | 1.407 (5) | C9—H9C | 0.9600 |
| C5—C6 | 1.355 (5) | ||
| N1—C1—N2 | 128.6 (3) | C7—C6—H6 | 119.6 |
| N1—C1—H1 | 115.7 | C8—C7—C6 | 119.8 (3) |
| N2—C1—H1 | 115.7 | C8—C7—H7 | 120.1 |
| N2—C2—O1 | 120.3 (3) | C6—C7—H7 | 120.1 |
| N2—C2—C3 | 123.2 (3) | C7—C8—C3 | 120.0 (3) |
| O1—C2—C3 | 116.5 (2) | C7—C8—H8 | 120.0 |
| C8—C3—C4 | 120.2 (3) | C3—C8—H8 | 120.0 |
| C8—C3—C2 | 124.6 (3) | O1—C9—H9A | 109.5 |
| C4—C3—C2 | 115.2 (3) | O1—C9—H9B | 109.5 |
| N1—C4—C5 | 119.8 (3) | H9A—C9—H9B | 109.5 |
| N1—C4—C3 | 121.9 (3) | O1—C9—H9C | 109.5 |
| C5—C4—C3 | 118.2 (3) | H9A—C9—H9C | 109.5 |
| C6—C5—C4 | 120.9 (3) | H9B—C9—H9C | 109.5 |
| C6—C5—H5 | 119.6 | C1—N1—C4 | 115.5 (3) |
| C4—C5—H5 | 119.6 | C2—N2—C1 | 115.6 (3) |
| C5—C6—C7 | 120.8 (3) | C2—O1—C9 | 116.9 (2) |
| C5—C6—H6 | 119.6 |