Question

An alkyl halide reacts with a group 14 element $Y$ at 570K with $Cu$ as a catalyst and produces a dialkyl chloro compound $Z$. The compound $Z$ on hydrolysis gives another compound which is a strong water repellent and quite inert chemically. The dioxide of $Y$ is acidic in nature. The alkyl halide can also be obtained from methane after monosubstitution. Identify $Y$ and $Z$.

• A. $Y=Si$ and $Z=(C{H}_3{)}_{2}SiC{l}_2$
• B. $Y=Si$ and $Z=C{H}_{3}Cl$
• C. $Y=C$ and $Z=SiC{l}_4$
• D. $Y=Si$ and $Z=CC{l}_4$

Answer 1

The correct option is A $Y=Si$ and $Z=(C{H}_3{)}_{2}SiC{l}_2$

Monosubstitution of methane gives methyl chloride. It reacts at $570K$ with $Si$ having $Cu$ as catalyst to produce $(C{H}_3{)}_{2}SiC{l}_2$, which is the compound $Z$.

$(C{H}_3{)}_{2}SiC{l}_2$ on hydrolysis gives $\left(C{H}_3{)}_{2}Si\right(OH{)}_2$, which is a strong water repellent and quite inert chemically. Also $Si{O}_2$ is acidic in nature.