Question

The order of circled $C-H$ bond dissociation energy in the following compound is

• A. (ii) > (i) > (iv) > (iii)
• B. (iv) > (iii) > (i) > (ii)
• C. (i) > (ii) > (iv) > (iii)
• D. (i) > (iv) > (ii) > (iii)

Answer 1

Answer: (C)

Bond dissociation energy or bond energy $(BE)$ of $C-H$ bond of a hydrocarbon $(RH)$ can be predicted from stability of free radical $(R)$ formed by homolytic bond fission of $C-H$ bond of the hydrocarbon