Received 27 July 2012
The title compound, C11H13NO2Si, 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 P212121, the volume decreases by 5% and the molecule distorts. The greatest molecular distortions from Cs symmetry are rotations of the trimethylsilyl 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).
For the synthesis of the title compound, see: Takahashi et al. (1980). For the crystal structure of the room temperature form of the title compound, see: Garcia et al. (1998). For a description of the Cambridge Structural Database, see: Allen (2002). For Hooft analysis of Bijvoet pairs, see: Hooft et al. (2008).
Data collection: COLLECT (Nonius, 2000); cell refinement: DENZO and SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO and SCALEPACK; program(s) used to solve structure: SIR2002 (Burla et al., 2003); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SU2491 ).
Purchase of the diffractometer was made possible by grant No. LEQSF(1999-2000)-ESH-TR-13, administered by the Louisiana Board of Regents.
Allen, F. H. (2002). Acta Cryst. B58, 380-388.
Burla, M. C., Camalli, M., Carrozzini, B., Cascarano, G. L., Giacovazzo, C., Polidori, G. & Spagna, R. (2003). J. Appl. Cryst. 36, 1103.
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.
Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837-838.
Flack, H. D. (1983). Acta Cryst. A39, 876-881.
Garcia, J. G., Asfaw, B., Rodriguez, A. & Fronczek, F. R. (1998). Acta Cryst. C54, 489-491.
Hooft, R. W. W., Straver, L. H. & Spek, A. L. (2008). J. Appl. Cryst. 41, 96-103.
Nonius (2000). COLLECT. Nonius BV, Delft, The Netherlands.
Otwinowski, Z. & Minor, W. (1997). Methods in Enzymology, Vol. 276, Macromolecular Crystallography, Part A, edited by C. W. Carter Jr & R. M. Sweet, pp. 307-326. New York: Academic Press.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Takahashi, S., Kuroyama, Y., Sonogashira, K. & Hagihara, N. (1980). Synthesis, 8, 627-630.