Question
Hydrogenation of the above compound in the presence of
poisoned palladium catalyst gives
A.
an optically active compound
B.
an optically inactive compound
C.
a racemic mixture
D.
a diastereomeric mixture
Answer :
an optically inactive compound
Solution :
TIPS/Formulae :
Addition on triple bond takes place by the syn-addition of hydrogen.
Since the configuration of the double bond already present is cis, the compound formed will have a plane of symmetry and hence optically inactive.
TIPS/Formulae :
Addition on triple bond takes place by the syn-addition of hydrogen.
Since the configuration of the double bond already present is cis, the compound formed will have a plane of symmetry and hence optically inactive.