general method of preparation of haloalkanes

while almost haloalkanes are human produced..

general method is when alkanes react with free radical halogenation...in this rxn H atom is removed from alkane,,then replaced by a halogen atom by reaction with a diatomic halogen molecule.

Dear Akansha Sawhney,

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Dear student,

Making halogenoalkanes from alcohols using hydrogen halides

The general reaction looks like this:

Dear akansha sawhney,

The General Method by which you prepare a Haloalkane is from an Alcohol !!

Alcohols on tratment with Sulphonyl Chloride[SOCl₂](most preferrable) gives haloalkanes !

CH₃CH₂OH + SOCl₂ ---------->  CH₃CH₂Cl + SO₂ + HCl

The Separation of the Haloalkane & Hydrogen chloride & Sulpher di-oxide are easier because SOCl₂ & HCl are volaitle !!

Thus this is the generally eaier way to prepare Haloalkanes !!

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Sorry to say that,SOCl2 is not most preferred reagent.Oxalyl chloride is the best reagent.