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Synthesis and functionalization of Poly[5,5′-(silylene)-2,2′-dithienylene]s using silyl triflate intermediates†

✍ Scribed by Wolfram Uhlig

Book ID
101275243
Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
107 KB
Volume
13
Category
Article
ISSN
0268-2605

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✦ Synopsis

Treatment of 5,5'-dilithio-2,2'-dithiophene with (dimethylamino)methylsily bis(triflate)-or a, vbis(triflate)-substituted trisilanes gave poly[5,5'-(silylene)-2,2'-dithienylene]s in high yields. The amino-silyl bond was cleaved selectively by triflic acid, leading to triflate-substituted derivatives. Conversion of these compounds with nucleophiles gave other functionalized polymers. Platinum-catalyzed hydrosilylation reactions between silicon-vinyl and silicon-hydrogen derivatives result in polymer networks which may serve as interesting preceramic materials. The structures of the polymers were proven by NMR spectroscopy ( 29 Si, 13 C, 1 H). Results of thermal gravimetric analysis (TGA), UV spectrometry and conductivity measurements are given.

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A high-yield synthesis toward 5,5 -bis(silyl)-functionalized 3,3 -dibromo-2,2 -dithiophenes with very efficient work-up procedure is presented. The molecular structures of two silyl functionalized dibromo-dithiophenes in the solid state have been determined to investigate the structural influences o