Acta Cryst. (2009). E65, o451  [ doi:10.1107/S1600536809003614 ]

9,9-Dimethyl-9-silafluorene

J. Mewes, H.-W. Lerner and M. Bolte

Abstract: The title compound, C₁₄H₁₄Si, crystallizes with two almost identical molecules (r.m.s. deviation = 0.080 Å for all non-H atoms) in the asymmetric unit. All atoms of the silafluorene moiety lie in a common plane (r.m.s. deviations = 0.049 and 0.035 Å for the two molecules in the asymmetric unit). The Si-C_methyl bonds are significantly shorter [1.865 (4)-1.868 (4) Å] than the Si-C_aromatic bonds [1.882 (3)-1.892 (3) Å]. Owing to strain in the five-membered ring, the endocyclic C-Si-C angles are reduced to 91.05 (14) and 91.21 (14)°.

Online 4 February 2009

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