Question

Which of the following leads to the formation of an alkyl halide?

• A. $C_2{H}_{5}OH\stackrel{PC{l}_5}{\to }$
• B. $C_2{H}_{5}OH\stackrel{SOC{l}_2}{\to }$
• C. $C_2{H}_{5}OH\stackrel{PC{l}_3}{\to }$
• D. All

Answer 1

The correct option is D All

a)b)
This reaction follows $S{N}_i$ mechanism.​ In intramolecular nucleophilic substitution reaction, retention of configuration takes place​. Hence, the correct answer will be option (a).
$C_2{H}_{5}OH\stackrel{SOC{l}_2}{\to }$$C_2{H}_{5}Cl$
This is a good method for the preparation ​of alkyl halide​. By-products of this reaction are gaseous in nature.

c)
$C_2{H}_{5}OH\stackrel{PC{l}_3}{\to }{C}_2{H}_{5}Cl+H_{3}P{O}_3$

All of the above is formation of an alkyl halide. Hence option d is correct.