Title

4-Nitro-1-[(trimethyl-sil-yl)ethyn-yl]benzene: low-temperature polymorph at 100 K

Document Type

Article

Publication Date

9-1-2012

Abstract

The title compound, C(11)H(13)NO(2)Si, is a low-temperature form of the previously reported room-temperature structure [Garcia et al. (1998 ▶). Acta Cryst. C54, 489-491]. At 298 K, the material crystallizes in the space group Pnma and occupies a crystallographic mirror plane, but at 100 K the space group changes to P2(1)2(1)2(1), the volume decreases by 5% and the mol-ecule distorts. The greatest mol-ecular distortions from C(s) symmetry are rotations of the trimethyl-silyl and nitro groups by 10.56 (8) and 11.47 (9)°, respectively, to the benzene mean plane. At low temperature, the crystal also becomes an inversion twin, the refined ratio of the twin components being 0.35 (15):0.65 (15).

Publication Source (Journal or Book title)

Acta crystallographica. Section E, Structure reports online

First Page

o2652

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