Pyridine-catalyzed reactions of methyldichlorosilane with bis(trimethylsily
l) carbodiimide afford a dichlorosilane-derived anhydrous sol-gel material.
Both trimethylchlorosilane formation and Si-H disproportionation act as cr
osslinking mechanisms. The dried gels form amorphous or crystalline materia
ls, depending on the sample history. The xerogels gave Si/C/N ceramics when
pyrolyzed at 1200 degrees C, Copyright (C) 1999 John Wiley & Sons, Ltd.