Transition Metal Induced Topotactic C-C Bond Formation
- 1 April 1993
- journal article
- Published by Taylor & Francis in Phosphorus, Sulfur, and Silicon and the Related Elements
- Vol. 77 (1-4) , 29-32
- https://doi.org/10.1080/10426509308045611
Abstract
The thermolyses of dichlorobis-(1-phenyl-3,4-dimethylphosphole) platinum (II), 1, and dichlorobis-(1-phenyl-3,4-dimethylphosphople) palladium (In, 2, were investigated in 1,1,2,2-tetrachloroethane solutions and in the crystalline state. The solid state reactions show a high degree of topotacticity and probably involve 1,4-biradical intermediates. Three compounds are formed upon thermolysis of 1 in 1,1,2,2-tetrachloloethane at 142°C (scheme I): a [4+2] cycloaddition product, 3; a [2+2] cycloaddition product, 4, and a compound, 5, that results from 1,5-hydrogen migration from a methyl group on one phosphole to the β-carbon of an adjacent phosphole. Only 5 is ultimately formed in quantitative yield from 1 after 24 hours at 150°C in the solid state.Keywords
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