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Reshav posted an Question
September 13, 2020 • 01:25 am 30 points
  • IIT JAM
  • Chemistry (CY)

Which one of the following has the smallest heat of hydrogenation? (d) 1,3-butadiene (a) 1-butene write the decreasing order of reactivity towards electronhilic

Which one of the following has the smallest heat of hydrogenation? (d) 1,3-Butadiene (a) 1-Butene Write the decreasing order of reactivity towards electronhilic addition. b) trans-2-Butene (c) cis-2-Butene

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  • Suman Kumar Best Answer

    option D is correct

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    pls explain reason

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    because isme to alpha hydogen ek bhi nhi hai then iski hoh to sbse jada honi chahiye

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    more double bond more heat of hydrogenation

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    But we have to check heat of hydrogenation per double bond

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    heat of hydrogenation per double bond compare karna

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    Priyanshu kumar best-answer

    Reshav first arrange this in stability order

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    One concept is more the number of double bonds more is the heat of hydrogenation

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    and one concept is stability of alkene inversely proportional to HOH

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    1,3 butadiene is conjugated diene

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    It is most stable here...so least heat of hydrogenation

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    got this ??

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    sir how it is more stable it has not single alpha hydogen even

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    always conjugated alkene is more stable

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    then we check alpha hydrogen for stability

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    ok

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    now get the point

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    😊👍

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