Issue 7, 2002

Hexakis(trialkylsilyl)cyclotrisilanes and photochemical generation of bis(trialkylsilyl)silylenes

Abstract

Hexakis(trialkylsilyl)cyclotrisilanes 1a (trialkylsilyl = tert-butyldimethylsilyl) and 1b (trialkylsilyl = diisopropylmethylsilyl) were synthesized by the reductive coupling of the corresponding 2,2-dibromotrisilanes. Their molecular structures were confirmed by X-ray crystallography. In the absence of trapping reagents, photolysis of cyclotrisilanes 1a and 1b gave the corresponding stable tetrakis(trialkylsilyl)disilenes quantitatively. Irradiation of cyclotrisilanes 1a and 1b in (Z)-2-butene and (E)-2-butene afforded exclusively the corresponding (Z)- and (E)-2,3-dimethyl-1-silacyclopropanes, respectively. Stereospecific formation of the cycloadducts indicates that the bis(trialkylsilyl)silylenes generated from cyclotrisilanes 1a and 1b would be singlets in the ground state.

Graphical abstract: Hexakis(trialkylsilyl)cyclotrisilanes and photochemical generation of bis(trialkylsilyl)silylenes

Supplementary files

Article information

Article type
Paper
Submitted
04 Sep 2001
Accepted
23 Jan 2002
First published
08 Mar 2002

J. Chem. Soc., Dalton Trans., 2002, 1539-1544

Hexakis(trialkylsilyl)cyclotrisilanes and photochemical generation of bis(trialkylsilyl)silylenes

M. Kira, T. Iwamoto, T. Maruyama, T. Kuzuguchi, D. Yin, C. Kabuto and H. Sakurai, J. Chem. Soc., Dalton Trans., 2002, 1539 DOI: 10.1039/B107905K

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