General Organic ChemistryHard

Question

Which of the following compound possesses the C - H bond with the lowest bond dissociation energy ?

Options

A.Toluene
B.Benzene
C.n-pentane
D.2, 2-dimethylpropane

Solution

Among the carbonium ions firmed by the cleavage of thee C - H bond, the order ofstabillity is :
C6H5CH2+ > (CH3)3 C+CH2 > CH3(CH2)3 CH2+ > C6H5+
CH2 - H, C- H bond energy will be lowest.

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