Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 11 (November 2007)

organic compounds

jz3090 scheme

Acta Cryst. (2007). C63, o613-o616 [ doi:10.1107/S0108270107045465 ]

Two modifications of a five-coordinate silicon complex

U. Böhme and I. C. Foehn

Abstract: TBPY-5-34-(Butane-1,4-diyl)(2-{[1-(2-oxidophenyl)ethylidene- [kappa] O]amino- [kappa] N}ethanolato- [kappa] O)silicon, C₁₄H₁₉NO₂Si, crystallizes in two modifications. The monoclinic form, (IIm), was obtained by crystallization over a period of 2 d at room temperature; the orthorhombic form, (IIo), crystallized overnight at 248 K. The main difference between the two molecular structures involves the angles in the equatorial plane of the trigonal bipyramid around silicon. Form (IIm) has an O-Si-O angle of ca 121° and O-Si-C angles of ca 121 and 116°. In form (IIo), the corresponding angles are 123, 124 and 111°. There are also significant differences in the packing: (IIm) shows [pi] stacking, whereas (IIo) does not.

Formula: C₁₄H₁₉NO₂Si


	Structure factor file (CIF format) (172.7 kbytes) [ doi:10.1107/S0108270107045465/jz3090IImsup2.hkl ] Contains datablock IIm

	Structure factor file (CIF format) (187.0 kbytes) [ doi:10.1107/S0108270107045465/jz3090IIosup3.hkl ] Contains datablock IIo

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