Organic Compounds Containing Halogens Question 140

Question: In which one of the following conversions phosphorus pentachloride is used as a reagent

[EAMCET 1997]

Options:

A) $ H_2C=CH_2\to CH_3CH_2Cl $

B) $ H_3C-O-CH_3\to CH_3Cl $

C) $ CH_3CH_2OH\to CH_3CH_2Cl $

D) $ HC\equiv CH\to CH_2=CHCl $

Show Answer

Answer:

Correct Answer: B

Solution:

$ CH_3-O-CH_3+PCl_5\to 2CH_3Cl+POCl_3 $

$ CH_3CH_2OH+PCl_5\to CH_3CH_2Cl+HCl+POCl_3 $

So, both reaction carried out by $ PCl_5 $