Question

To get the silicone $R_{3}Si–(OSi{R}_2{)}_n–Si{R}_3$ having 4 Si-O-Si linkage, the unit taken is:

• A. 4 units of $R_{2}SiC{l}_2$ and 2 units of $R_{3}SiCl$
• B. 2 units of $R_{2}SiC{l}_2$ and 2 units of $R_{3}SiCl$
• C. 3 units of $R_{3}SiCl$ and 2 units of $R_{2}SiC{l}_2$
• D. 3 units of $R_{2}SiC{l}_2$ and 2 units of $R_{3}SiCl$

Answer 1

The correct option is D 3 units of $R_{2}SiC{l}_2$ and 2 units of $R_{3}SiCl$

$R_{3}SiCl\stackrel{hydrolysis}{\to }{R}_{3}Si\left(OH\right)R_{2}SiC{l}_2\stackrel{hydrolysis}{\to }{R}_{2}Si(OH{)}_2$

Thus, 2 units of $R_{3}SiCl$ and 3 units of $R_{2}SiC{l}_2$ are required.