Synthesis and Thermal Decomposition Studies of Silicon (IV) Compounds with N,N’-Bis(Salicylidene)Ethylenediimine

The silicon (IV) compounds possessing SiN4O2 (6), SiN2O2C2 (7, 8), SiN2O2CCl (9) and SiN4O4 (10) coordinating frameworks have been synthesized in high yield by the reaction of the O,N,N,O- donor salen-type ligand N,N’-bis(salicylidene)ethylenediimine L with different silanes i.e. diethoxydiisocyanatosilane-(C2H5O)2Si(NCO)2 1, dichlorodiphenylsilane-Ph2SiCl2 2, dichloromethyl- phenylsilane-MePhSiCl2 3, trichlorophenylsilane-PhSiCl3 4 and silicon tetrachloride-SiCl4 5. The compounds 6–10 have been characterized by elemental analysis, IR, 1H, 13C and 29Si NMR and mass spectrometry. The decomposition reactivity of these compounds has been studied using a Thermal Gravimetric Analyzer (TGA) at a heating rate of 10°C/minute in an inert atmosphere.