Structure of PbSi complex alkoxide prepared from lead acetate and tetraethoxysilane

Abstract

The products of the reaction between lead acetate and tetraethoxysilane in 2-methoxyethanol at 100°C were estimated by kinematic viscosity measurement and infrared and 1H nuclear magnetic resonance spectroscopic techniques. Two reaction methods were used; in method I lead acetate and tetraethoxysilane were mixed in 2-methoxyethanol, whereas in method II each reactant was pretreated in 2-methoxyethanol and then mixed. The reaction product in method I was estimated as (CH 3COO)PbOSi(OC 2H 4OCH 3) 3, which polymerized on prolonged heating. In method II lead acetate and tetraethoxysilane were changed to (CH 3COO)Pb(OC 2H 4OCH 3) and Si(OC 2H 4OCH 3) 4 respectively before mixing. The reaction product in method II was estimated as (CH 3OC 2H 4O)PbOSi(OC 2H 4OCH 3) 3. No polymerization reaction occurred because of the absence of acetyl group in the reaction product.