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1,1,3,3-四叔丁基-2,2-二异丙基-4,4-二苯基环四硅烷

1,1,3,3-Tetra-tert-butyl-2,2-diisopropyl-4,4-diphenyl-cyclo-tetra-silane.

作者信息

Kuribara Takayoshi, Kyushin Soichiro

机构信息

Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.

出版信息

Acta Crystallogr Sect E Struct Rep Online. 2013 Jan 1;69(Pt 1):o149. doi: 10.1107/S160053681205074X. Epub 2012 Dec 22.

DOI:10.1107/S160053681205074X
PMID:23476402
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3588281/
Abstract

The molecule in the structure of the title compound, C34H60Si4, lies on a twofold rotation axis that passes through the two Si atoms, resulting in a planar cyclo-tetra-silane ring. The dihedral angle between the cyclo-tetra-silane ring and the phenyl ring is 68.20 (5)°. The Si-Si bonds [2.4404 (8) and 2.4576 (8) Å] are longer than a standard Si-Si bond (2.34 Å) and the C-Si-C bond angle [97.07 (14)°] of the phenyl-substituted Si atom is smaller than the tetra-hedral bond angle (109.5°). These long bonds and small bond angle are favorable for reducing the steric hindrance among the bulky substituents.

摘要

标题化合物C34H60Si4的结构中的分子位于一条穿过两个硅原子的二重旋转轴上，形成一个平面环四硅烷环。环四硅烷环与苯环之间的二面角为68.20 (5)°。硅-硅键[2.4404 (8) 和2.4576 (8) Å] 比标准硅-硅键（2.34 Å）长，且苯基取代硅原子的C-Si-C键角[97.07 (14)°] 小于四面体键角（109.5°）。这些长键和小键角有利于减少庞大取代基之间的空间位阻。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad3d/3588281/f4efb0df50d8/e-69-0o149-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad3d/3588281/9715ecdcbde0/e-69-0o149-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad3d/3588281/bc0d21bee815/e-69-0o149-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad3d/3588281/f4efb0df50d8/e-69-0o149-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad3d/3588281/9715ecdcbde0/e-69-0o149-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad3d/3588281/bc0d21bee815/e-69-0o149-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad3d/3588281/f4efb0df50d8/e-69-0o149-fig3.jpg

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本文引用的文献

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