Hydrocarbons
18.0 Toluene
18.0 Toluene
For side chain halogenation, case of abstraction of hydrogen atom is as follows:
$$Allylic\,\,or\,\,benzylic\,\, > {3^o} > {2^o} > {1^o} > C{H_4} > Vinylic$$
$\therefore $the stability order of free radicals is
$$allylic > {3^o} > {2^o} > {1^o} > - C{H_3} > vinylic$$
Bromine is more selective than chlorine.
