anti -2,2,3,3,6,6,7,7,10,10,11,11,14,14,15,15-Hexadecamethyl-2,3,6,7,10,11,14,15-octasilapentacyclo[10.4.2.2 4,9 .0 5,8 .0 13,16 ]icosa-1(17),4,8,12(18),13(16),19-hexaene

The title compound, C28H52Si8, was synthesized by condensation of two molecules of 1,2,3,4-tetrakis(chlorodimethylsilyl)benzene with lithium. The 3,4-disila-1,2-benzocyclobutene rings in the centrosymmetric molecule are bridged by 1,1,2,2-tetramethyldisilanylene chains with an anti conformation. The...

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Published inActa crystallographica. Section E, Structure reports online Vol. 69; no. 3; p. o341
Main Authors Toma, Yuki, Otsuka, Kyohei, Kyushin, Soichiro
Format Journal Article
LanguageEnglish
Published International Union of Crystallography 01.03.2013
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Summary:The title compound, C28H52Si8, was synthesized by condensation of two molecules of 1,2,3,4-tetrakis(chlorodimethylsilyl)benzene with lithium. The 3,4-disila-1,2-benzocyclobutene rings in the centrosymmetric molecule are bridged by 1,1,2,2-tetramethyldisilanylene chains with an anti conformation. The benzene rings are deformed by fusion with a 3,4-disilacyclobutene ring resulting in a slight boat conformation. Two Si-C bonds are bent to reduce the steric repulsion between the methyl groups on the two Si atoms and the methyl groups on another two Si atoms.
ISSN:1600-5368
1600-5368
DOI:10.1107/S1600536813002584