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Synthesis and oxidation of 1,1,2,2-tetramethyl-3,4,5,6-tetraphenyl-1,2-disila-3,4-cyclohexadiene

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
47
Issue
1
Identifiers
DOI: 10.1016/s0022-328x(00)92840-7

Abstract

Abstract The synthesis of 1,1,2,2-tetramethyl-3,4,5,6-tetraphenyl-1,2-disila-3,4-cyclohexadiene, (I), from 1,4-dilithiotetrapheynylbutadiene and 1,2-dichlorotetramethyldisilane is described. (I) is reluctant to react with singlet oxygen, in contrast to its carbon analogue, but the SiSi bond of(I) is readily oxidized to give 2,2,7,7-tetramethyl- 3,4,5,6-tetrapheynyl-1-oxo-2,7-disila-3,5-cycloheptadiene. The mechanism of the formation of this siloxane is discussed, and a peroxy radical shown to act as an important intermediate in the oxidation.

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