Synthesis of polysilanes bearing pendant carbosilyl groups and 29 Si-NMR probe on the tacticity using side chain silicon atoms

R Shankar, A Saxena, AS Brar

Index: Shankar, Ravi; Saxena, Anubhav; Brar, Ajaib S. Journal of Organometallic Chemistry, 2002 , vol. 650, # 1-2 p. 223 - 230

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Abstract

New functional polysilanes [R2R1Si (CH2) 2SiH] n (R= Me, R1= H (1); R= R1= Et (2); R= Me, R1= Ph (3)) bearing carbosilyl side chains have been synthesized by catalytic dehydropolymerization of precursor carbosilanes R2R1SiCH2CH2SiH3 using Cp2TiCl2– BuLi as a catalyst. These polymers are characterized by 1H, 13C, 29Si,{1H–29Si} HSQC NMR spectroscopy, GPC and TGA. Attempts to delineate the tacticity from the analysis of ...