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InterviewSolution
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Which cycloalkane has the lowest heat of combustion per `CH_2` groupA. CyclopropaneB. CyclobutaneC. CyclopentaneD. Cyclohexane |
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Answer» Correct Answer - D In cyclopropane, the angle strain is maximum hence it is a highly strained molecule and consequently most unstable . The angle strain in cyclobutane is less than than in cyclopropane, hence cyclobutane is more stable than cyclopropane, hence cyclobutane is more stable than cyclopropane. This stability increases upto 6 membered rings, then decreases from 7 to 11 membered rings and from the 12 membered onwards attains the stability of 6 membered ring. Heat of combustion is a method of measuring chemical stability . Hence cyclohenxane has the lowest heat of combustion per `-CH_2` group. |
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