Question

How chloroalkanes are prepard from alcohol and thionyl chloride

Answer 1

Chloroalkanes are prepared from alcohols by treating them with HX + anhyd. Zncl2 / Pcl5 /Pcl3 etc.

Chloroalkanes are prepared from thionyl chloride that is SoCl2 by following reaction

ROH + SoCl2 gives RCl + So2 + Hcl

This methid is consider as best method to prepare Chloroalkanes as so2 and hcl are gaseous in nature.

Answer 2

Chloroalkane is prepared by the reaction of alcohol with thionyl chloride,

• R-OH + SOCl₂ → R-Cl + SO₂ +HCl
• Alcohol + Thionyl chloride → Chloroalkanes + Sulphur dioxide + hydrochloric acid.
• This is considered the best method for the preparation of chloroalkanes.
• As we can see, the by-products (sulfur dioxide and hydrochloric acid) are gaseous reagents.
• They can be easily removed from the mixture, leaving behind chloroalkane in its purest form.
• Chloroalkanes are used as additives in rubber, paints, textiles, and other coatings.
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