Siloxane and hydrocarbon octopus molecules with silsesquioxane cores
- 1 January 1993
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 3 (12) , 1319-1325
- https://doi.org/10.1039/jm9930301319
Abstract
Hydrogen silsesquioxane, (HSiO)8, T8, has been synthesized and isolated in synthetically useful quantities. The T8 cage-like structure allows eight pendant groups to be placed symmetrically about the surface of a sphere to form an ‘octopus’ molecule. Using T8 to hydrosilylate compounds with the formula CH2 CH(X)nY, octopus molecules of the formula (SiO)8(CH2CH2(X)nY)8 have been synthesized, including octopus molecules with organic ‘arms’ as well as those with silicone ‘arms’ of various lengths. The regioselectivity of addition in the above two cases was found to differ. The synthesis of these novel octapus molecules and their characterisation by 29Si NMR, FTIR, and gel-permeation chromatography (GPC) is described.Keywords
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