Question

Alkyl halide when heated with alcoholic solution of potassium sulphide forms:

• A. thioalcohol
• B. thioether
• C. thioacid
• D. alkane

Answer 1

The correct option is B thioether

$R-X+K_{2}S\underset{-KX}{\overset{}{\to }}R-S-K$

$R-S-K+R-X\underset{-KX}{\overset{}{\to }}R-S-R$

We Know that $electronegativity$ $\propto \frac{1}{Nucleophilicity}$

Explanation : In $RX$ alkyl halide, there is partial negative charge on $X$ and partial positive charge on $R$. $R-S-K$ in $S$ has electron accepting nature which make partial negative charge on it and $K$ is a metal which contain partial positive charge. Hence according to nucleophilic reaction, the major product will Thioether.

Hence the correct option is B.