Question

How do you prepare chloroalkane using reaction between alcohol and

phosphorus pentachloride​

Answer 1

Primary and secondary alcohols react with hydrochloric acid gas in the presence of catalyst like anhydrous ZnCl2 to form haloalkanes. Tertiary alcohols do not need catalyst because they are more reactive and react readily by conc. HCl.

Example : The following three reactions illustrate this method of preparation of chloroalkanes :

Answer 2

Alcohols react with liquid phosphorus(III) chloride (also called phosphorus trichloride) to make chloroalkanes. Solid phosphorus(V) chloride (phosphorus pentachloride) reacts violently with alcohols at room temperature, producing clouds of hydrogen chloride gas