Question

Among the following substituted silanes, the one that gives rise to cross-linked silicon polymer on hydrolysis is:

• A. $R_{4}Si$
• B. ${RSiCl}_3$
• C. $R_2{SiCl}_2$
• D. $R_{3}SiCl$

Answer 1

The correct option is B ${RSiCl}_3$

The hydrolysis of $R_2{SiCl}_2$ gives dialkyl silanediol which on polymerization gives a linear polymer.

The hydrolysis of ${RSiCl}_3$ gives alkyl silanetriol which on polymerization gives a cross-linked silicon polymer. The reaction is shown.