BCECE Engineering BCECE Engineering Solved Paper-2012

  • question_answer
    IUPAC name of the following is \[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-C\equiv CH\]

    A)  1, 5-hexenyne                 

    B)  1-hexene-5-yne             

    C)  l-hexyne-5-ene

    D)         1, 5-hexynene

    Correct Answer: B

    Solution :

    The double bond gets priority over triple bond. So, the IUPAC name of \[\overset{1}{\mathop{C}}\,{{H}_{2}}=\overset{2}{\mathop{C}}\,H-\overset{3}{\mathop{C}}\,{{H}_{2}}-\overset{4}{\mathop{C}}\,{{H}_{2}}-\overset{5}{\mathop{C}}\,\equiv \overset{6}{\mathop{C}}\,H\] is hex-1-en-5-yne or 1-hexene-5-yne


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