A stable compound containing a silicon-silicon triple bond

被引：419

作者：

Sekiguchi, A ^{[1
]}

Kinjo, R ^{[1
]}

Ichinohe, M ^{[1
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Dept Chem, Tsukuba, Ibaraki 3058571, Japan

来源：

SCIENCE | 2004年 / 305卷 / 5691期

关键词：

D O I：

10.1126/science.1102209

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The reaction of 2,2,3,3-tetrabromo-1,1,4,4-tetrakis [bis(trimethylsilyl)methyl]1,4-diisopropyltetrasilane with four equivalents of potassium graphite (KC8) in tetrahydrofuran produces 1,1,4,4-tetrakis[bis(trimethylsilyl)methyl]-1,4-diisopropyl-2-tetrasilyne, a stable compound with a silicon-silicon triple bond, which can be isolated as emerald green crystals stable up to 100 C in the absence of air. The Si=Si triple-bond length (and its estimated standard deviation) is 2.0622(9) angstroms, which shows half the magnitude of the bond shortening of alkynes compared with that of alkenes. Unlike alkynes, the substituents at the Si=Si group are not arranged in a linear fashion, but, are trans-bent with a bond angle of 137.44(4)degrees.

引用

页码：1755 / 1757

页数：3

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