酢酸鉛とテトラエトキシシランから得られた複合アルコキシドの構造

抄録

The products of reaction between lead acetate and tetraethoxysilane (TEOS) in 2-methoxyethanol (CH₃OC₂H₄OH) at 100°C were identified by kinematic viscosity measurement and IR and 1H-NMR spectroscopic techniques. Two reaction methods were used: Lead acetate and TEOS were directly reacted in Method I, whereas they were reacted with 2-methoxyethanol prior to the reaction in Method II. The reaction product in Method I is identified as (CH₃COO)-Pb-O-Si-(OC₂H₄OCH₃)₃, which polymerized during prolonged heating. In Method II, lead acetate and TEOS changed to (CH₃COO)-Pb-(OC₂H₄OCH₃) and Si(OC₂H₄OCH₃)₄, respectively, by the reaction with 2-methoxyethanol. The reaction product in Method II was identified as (CH₃OC₂H₄O)-Pb-O-Si-(OC₂H₄OCH₃)₃. No polymerization reaction occurred, because there was no acetyl group in the reaction product.