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The role of oligomers in the synthesis of polysilanes by the Wurtz reductive coupling reaction

By David Bratton, Simon J. Holder, Richard G. Jones and William K.C. Wong


Size exclusion chromatography and Si-29-NMR spectroscopy have been used to investigate the evolution of low-molecular weight molecules during the synthesis of poly(methylphenylsilane) by alkali metal-mediated reductive coupling in diethyl ether, tetrahydrofuran and toluene, revealing clear evidence for the important role played by a dimer. In addition, the distinct origins of the stable cyclic oligomers that are ubiquitous side products of these reactions have been established, cyclopentamers being formed through endbiting during chain growth and cyclohexamers by a degradative backbiting reaction. (C) 2003 Elsevier B.V. All rights reserved

Topics: Q, QD
Year: 2003
DOI identifier: 10.1016/s0022-328x(03)00641-7
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