Two crystal polymorphs of 3-(dimethylamino)benzoic anhydride

被引：3
|
作者：
Lynch, DE [1 ]
Hayer, R
Bagga, S
Parsons, S
机构：
[1] Coventry Univ, Sch Nat & Environm Sci, Coventry CV1 5FB, W Midlands, England
[2] Univ Edinburgh, Dept Chem, Edinburgh EH9 3JJ, Midlothian, Scotland
来源：
AUSTRALIAN JOURNAL OF CHEMISTRY | 2000年 / 53卷 / 07期
关键词：
polymorph; crystal X-ray analysis; benzoic anhydride;
D O I：
10.1071/CH99145
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two polymorphs of 3-(dimethylamino)benzoic anhydride have been determined by single crystal X-ray diffraction analysis. Polymorph (1) is triclinic (P1, a 7.112(3), b 9.289(4), c 13.364(5) Angstrom, alpha 96.39(2), beta 104.04(2), gamma 107.59(2)degrees, V 800.0(6) Angstrom (3) , Z 2) with the full molecule in the asymmetric unit, whereas polymorph (2) is monoclinic (C2/c, a 10.892(3), b 11.855(4), c 13.164 Angstrom, beta 112.14(3)degrees, V 1574.5(9) Angstrom (3), Z 4) with the central oxygen atom across a twofold axis. Differing conformations and C H hydrogen-bonding associations give rise to markedly different solid-state packing arrangements.
引用
收藏
页码：593 / 596
页数：4
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