A highly selective synthesis of new alkenylsilsesquioxanes by hydrosilylation of alkynes

Hydrosilylation of a wide group of mono- and disubstituted (symmetrical and nonsymmetrical) alkynes with 1-dimethylsiloxy-3,5,7,9,11,13,15-heptaisobutylpentacyclo-[9.5.1.1 .1 .1 ]octasiloxane ((HSiMe O)(i-Bu) Si O , 1) in the presence of Karstedt's catalyst (Pt (dvs) ) has been performed for th...

Full description

Saved in:
Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2017, Vol.46 (1), p.158-164
Main Authors: Franczyk, A, Stefanowska, K, Dutkiewicz, M, Frąckowiak, D, Marciniec, B
Format: Article
Language:English
Subjects:
Alkynes
Catalysts
Fourier transforms
Hydrosilylation
Infrared spectroscopy
Nuclear magnetic resonance
Nuclear reactions
Reagents
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hydrosilylation of a wide group of mono- and disubstituted (symmetrical and nonsymmetrical) alkynes with 1-dimethylsiloxy-3,5,7,9,11,13,15-heptaisobutylpentacyclo-[9.5.1.1 .1 .1 ]octasiloxane ((HSiMe O)(i-Bu) Si O , 1) in the presence of Karstedt's catalyst (Pt (dvs) ) has been performed for the first time. A series of new 1,2-(E)-disubstituted and 1,1,2-(E)-trisubstituted ethenes with a silsesquioxane moiety were selectively afforded and fully characterized. On the basis of nuclear magnetic resonance (NMR) and infrared spectroscopy (in situ FT-IR and/or FT-IR), the influence of alkyne structure and reaction conditions on the stereoselectivity as well as on the progress of triple bond hydrosilylation catalyzed by Pt (dvs) was explained. The results of the studies clearly indicated for which reagents the developed procedures lead to alkenylsilsesquioxanes with almost stoichiometric yields in short time, and for which other catalytic systems or methods should be considered.
ISSN:1477-9226
1477-9234
DOI:10.1039/c6dt04190f