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- IIT JAM
- Chemistry (CY)
Stability of order of alkenes
stability of order of alkenes explanationnnnnnnnnnnnnnnn
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Paramjeet verma![best-answer]()
Order of stability: Cyclohexene > Benzene > Cyclohexadiene Explanation: You must be aware of fact that Stability is inversely proportional to the Heat of Hydrogenation. And the heat of hydrogenation of given molecules are as follows: cyclohexene = -120 kJ/mol. ; cyclohexadiene = -231 kJ/mol ; benzene = -208 kJ/mol Thus using thermodynamic quantities, the order of the stabilities follow the above mentioned trend. (One can think that stability of benzene should be higher due resonance but one should also remember that increase in π bonds decreases the overall stability of the system. However, resonance has somewhat increases the stability and that is the reason why it is more stable than cyclohexadiene)