Silsesquioxane chemistry. 13. Synthesis and structural characterization of a dimeric indasilsesquioxane stabilized by intramolecular hydrogen bonding

The compound [Cy7Si7O12(OH)InMe]2 (2) was prepared in high yield (84%) by reacting the incompletely condensed silsesquioxane derivative Cy7Si7O9(OH)3 (1) with trimethylindium in toluene solution at 20 °C. The molecular structure of 2 has been determined by X-ray diffraction. In the solid state self-assembly leads to the formation of a dimeric indasilsesquioxane molecule which is stabilized by two intramolecular hydrogen bonds.