Engineering
Chemistry
Resonance and Bond Order
Question
For the compounds CH3Cl, CH3Br, CH3I and CH3F, the correct order of increasing C-halogen bond length is:
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Solution
C-halogen bond length totally depends on the electronegativity difference between Carbon and halogen. The more the difference is, the less is the bond length. The electronegativity order of halogens is I < Br < Cl < F. Hence, the correct order of increasing C-halogen bond length is CH3F < CH3Cl < CH3Br < CH3I.
Hence, the correct option is (A)