why does unsaturated hydrocarbon shows addition reaction and saturated hydrocarbon shows substitution reaction?

Asked by  | 12th Mar, 2012, 11:35: AM

Expert Answer:

In unsaturated hydrocarbons valency of carbon is fulfilled by double or triple bond there is space to add another substituent in place of multiple bonds between one carbon and other carbon of the same compound
In saturated compounds all carbons are attached through 4 single bonds, which means there is no space to add another substituent , if they undergo addition that would mean a particular carbon will be having 5 single bonds which is not desirable. They can only replace one of their groups with a new one.  thats why they always undergo substitution.

Answered by  | 12th Mar, 2012, 11:45: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.