2003年11月
Syntheses and structures of silicon analogues of cyclopropabenzenes
JOURNAL OF ORGANOMETALLIC CHEMISTRY
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- 巻
- 686
- 号
- 1-2
- 開始ページ
- 118
- 終了ページ
- 126
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0022-328X(03)00446-7
- 出版者・発行元
- ELSEVIER SCIENCE SA
The reactions of an overcrowded diaryldilithiosilane, Tbt(Dip)SiLi2 (Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl; Dip = 2,6-diisopropylphenyl), with o-dibromobenzene and 1,2,4,5-tetrabromobenzene resulted in the synthesis and isolation of the first stable silacyclopropabenzene and bis(silacyclopropa)benzenes (IUPAC name is 4,8-disilatricyclo[5.1.0.0(3,5)]octa-1,3(5),6-triene), respectively. The crystallographic analyses and theoretical calculations revealed that the lengths of the juncture carbon-carbon bonds of the mono- and bis(silacyclopropa)benzenes were marginally in the range of carbon-carbon bond lengths of usual benzene rings. It is shown that this structural feature is attributable to a decrease in the strain energy of silacyclopropabenzenes relative to the corresponding cyclopropabenzenes, and the strain energy is a simple additive function of the number of the fused three-membered rings involving Si atom. (C) 2003 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/S0022-328X(03)00446-7
- ISSN : 0022-328X
- Web of Science ID : WOS:000186346500016