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http://hdl.handle.net/2074/1047
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| Title: | Synthesis of polysilanes bearing pendant carbosilyl groups and 29Si-NMR probe on the tacticity using side chain silicon atoms |
| Authors: | Shankar, Ravi
Saxena, Anubhav
Brar, Ajaib S |
| Keywords: | Carbosilane
Hydrosilylation
Dehydropolymerization
Microstructure
Deconvolution |
| Issue Date: | 2002 |
| Citation: | Journal of Organometallic Chemistry, 650(1-2), 223-230 |
| 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 deconvoluted 29Si{1H}-NMR signals associated with the side chain silicon atoms reveal that the triad concentration ratio follows a Bernoullian statistical model for polymers 1 and 2 only. |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/1047 |
| Appears in Collections: | Chemistry
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| shankarsyn2002.pdf | | 320Kb | Adobe PDF | View/Open |
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