Abstract:

Cagelike silsesquioxane is a special type of polyhedral compound composed of both organic and inorganic molecules, whose structure can be determined effectively by ²⁹Si NMR. In this article, we studied the structures of six kinds of cage-like octa silsesquioxane by NMR. Combining experimental data and empirical treatment, it was found that the electronegativity of the subsistent on the cage has important influences on the silicon chemical shifts. The structures of the subsistent on cage-like silsesquioxane were determined by using ¹H and ¹³C NMR.

Key words: NMR, structure, ²⁹Si、1H、¹³C NMR, cage-like silsesquioxane