C—H bond energy is about 101 kcal/mol for methane, ethane and other alkanes but is only 77 kcal/mol for C—H bond of CH3 in toluene. This is because :

Question

C—H bond energy is about 101 kcal/mol for methane, ethane and other alkanes but is only 77 kcal/mol for C—H bond of CH3 in toluene. This is because : (A) of inductive effect due to —CH3 in toluene (B) of the presence of benzene ring in toluene (C) of resonance among the structures of benzyl radical in toluene (D) aromaticity of toluene

Tardigrade Admin · Accepted Answer

∵ C - H bond in toluene has partial double bond character due to resonance ∴ C - H bond in toluene has less energy as compared to others.

Q. $C — H$ bond energy is about $101 k c a l / m o l$ for methane, ethane and other alkanes but is only $77 k c a l / m o l$ for $C — H$ bond of $C H_{3}$ in toluene. This is because :

of inductive effect due to $— C H_{3}$ in toluene

of the presence of benzene ring in toluene

of resonance among the structures of benzyl radical in toluene

aromaticity of toluene

$∵ C - H$ bond in toluene has partial double bond character due to resonance

$∴ C - H$ bond in toluene has less energy as compared to others.

Q. C—H bond energy is about 101kcal/mol for methane, ethane and other alkanes but is only 77kcal/mol for C—H bond of CH3​ in toluene. This is because :

of inductive effect due to —CH3​ in toluene