Structural elucidations of T[sub 8] and Q[sub 8] silsesquioxane cages containing two types of pendant group using [sup 29] Si NMR spectroscopy

Bassindale, Alan Richard; Parker; Taylor, Peter Geoffrey and Watt, Alison Claire (2003). Structural elucidations of T[sub 8] and Q[sub 8] silsesquioxane cages containing two types of pendant group using [sup 29] Si NMR spectroscopy. Canadian Journal of Chemistry/Revue Canadienne de Chimie, 81(11) pp. 1341–1349.

DOI: https://doi.org/10.1139/V03-138

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Abstract

The products from the reaction of octahydrosilsesquioxane (T-8-H) with different molar ratios of phenol and undec-1-ene or methyl 3,3-dimethylpent-4-enoate (MDP) in the presence of chloroplatinic acid have been analysed by Si-29 NMR spectroscopy. The distribution of the two different pendant groups leads to tetrad patterns where the relative chemical peak intensities reflect the selectivity for particular patterns of substitution. As well as analysing the cause of these tetrad patterns we also discuss how the regioselectivity of hydrosilylation can be determined.

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