Identification of branched oligosilanes in the phenylsilane dehydrocoupling reaction

0376592 - ÚFCH JH 2013 RIV CH eng J - Journal Article
Pinkas, Jiří - Císařová, I. - Karban, Jindřich - Schraml, Jan - Sýkora, Jan
Identification of branched oligosilanes in the phenylsilane dehydrocoupling reaction.
Journal of Organometallic Chemistry. Roč. 710, JUL 1 2012 (2012), s. 20-25. ISSN 0022-328X. E-ISSN 1872-8561
R&D Projects: GA ČR GA203/09/1574; GA AV ČR IAA400720706
Institutional research plan: CEZ:AV0Z40400503; CEZ:AV0Z40720504
Keywords : Phenylsilane dehydrocoupling * LC-NMR * 29Si NMR
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.000, year: 2012

The products of phenylsilane dehydrocoupling were analyzed by means of advanced NMR techniques including LC-NMR. Attention was paid to the -SiPh- units not containing Si-H bonds. These units were observed in the 29Si NMR spectra reported previously. The 1J and 2J 29Si INADEQUATE experiments were used to reveal the connectivities within oligosilane chains. The presence of the branched oligophenylsilanes was confirmed in the reaction catalyzed by Cp2Ti(OAr)2, Ar = (2,6-(iPr)2C6H3). Furthermore, the formation of silyl-substituted cyclic oligomers and the presence of branched oligophenylsilanes in the catalytic systems studied by other authors were discussed. The LC-NMR and INADEQUATE experiments were optimized using the linear and low oligomeric products which were obtained by other catalysts. Some of these results are also presented.
Permanent Link: http://hdl.handle.net/11104/0208952