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Give the structure of an optically activ...

Give the structure of an optically active alkene `(A)` having the lowest molecular mass, which on catalytic hydrogenation gives an optically inactive compound `(B)`.

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For a compound to be an optically active alkene, with the lowest molecular mass, there should be four different groups around the `C` atom. One of the groups should be `(H)`, another should be alkene group `(-CH=CH_(2))`, and the remaining two groups should be `(Me)` and `(Et)`. So the compound `(A)` is `:`

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Give the structure of an optically active alkyne (A) having the lowest molecular mass, which on hydrogenatio with Lindlar's catalyst and Birch reduction gives the same lowest molecular mass optically active alkene. Also explain why. ltbr. But alkyne (A) on hydrogenation with D2 , with Lindlar's catalyst, and reduction with Na+ liq. ND_(3)+EtOH gives a different optically active alkene. Explain.

Give the structure of an optically active hydrocarbon (C_(6)H_(12)) which on catalytic hydrogenation gives an optically inactive compound (C_(6)H_(14)) .

Knowledge Check

  • Which is a optically active compound ?

    A
    Butan-2-ol
    B
    Isopropyl chloride
    C
    Neopentyl alcohol
    D
    Tertiary butyl alcohol

  • An optically active alkene with the molecular fomula C_(6) CH_(12) which upon hydrogenation gives optically inactive alkane is

    A
    2 - hexane
    B
    3 - methyl - 2- pentene
    C
    2 - methyl -2- pentene
    D
    3 - methyl-1-pentene

  • Optical active compounds have same

    A
    refractive index
    B
    action of PPL
    C
    configuration
    D
    all of these

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    Which of the following is an optically inactive compound?

    C(C_(6)H_(12)) , and optically active dydrocarbon which on catalytic hydrogenation gives an optically inactive compound, C_(6)H_(14) .

    Among the following compounds, the optically active alkane having the lowest molecular mass is:

    Carbene intermediates are produced by the photolysis of diazomethane (CH_2N_2) or kenene (CH_2 = C = O) . They are also produced by the reaction of CHX_3 with base or by Simmons-Smith reaction. There are two types of carbenes, singlet and triplet. They are so called due to their spin state. An optically active alkene (I) with lowest molecular mass on hydrogenation gives optically inactive alkene, but on insertion of methylene carbene ( : CH_2) in (I) , it gives optically active compound (II) . The compounds (I) and (II) are : .

    An optically active hydrocarbon X has molecular formula C_(6)H_(12) . X on catalytic hydrogenation gives optically inactive C_(6)H_(14).X could be

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