The enthalpy of hydrogenation for 1−pentene is +126kJ/mol. The enthalpy of hydrogenation for 1,3−pentadiene is +230kJ/mol. Hence estimate the resonance magnitude of (delocalization) energy of 1,3−pentadiene.
A
22kJ/mol
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B
104kJ/mol
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C
252kJ/mol
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D
cannot be calculated from this information
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Solution
The correct option is D22kJ/mol Enthalpy of hydrogenation per bond=+126kJ/mol