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An original route to poly[silylene‐ co ‐(2,4‐disilapentane‐2,4‐diyl)] oligomers, efficient precursors of silicon carbide‐based ceramics with variable C/Si ratios
Author(s) -
Pillot J. P.,
Birot M.,
Bacqué E.,
Dunoguès J.,
Biran C.,
Lapouyade P.,
Babot O.
Publication year - 1996
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199602)10:1<23::aid-aoc474>3.0.co;2-n
Subject(s) - chemistry , triple bond , ceramic , single bond , toluene , silylene , polymer chemistry , monomer , pyrolysis , silicon carbide , silicon , crystallography , double bond , organic chemistry , polymer , alkyl
Novel oligomers possessing a backbone formed of ((TRIPLE BOND)Si(SINGLE BOND)CH 2 (SINGLE BOND)Si(TRIPLE BOND)) and (SINGLE BOND)Si(SINGLE BOND) n units were prepared by the copolycondensation of bis(chlorosilyl)methanes and various dichlorosilanes in the presence of sodium, in refluxing toluene. The effect of the respective molar ratios of comonomers on the yields and the structure of the copolymers was investigated. The role of substituents on silicon atoms in the ability of these materials to provide convenient ceramic precursors upon pyrolysis was examined. When (TRIPLE BOND)Si(SINGLE BOND)H bonds were present, thermal cross‐linking was readily performed and ceramics possessing variable C/Si ratios were prepared.