(R = 8.314 JK–1 mol–1)
2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?
Reason 3-chloro-1-butene is a kinetically controlled product.
(R = Alkyl substituent)
The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentaylhexane using alcoholic KOH is
Reason : Calcium carbide contains C4− anions.
The synthesis of 3- octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are
In the scheme given below, the total number of inta molecular aldol condensation products formed from ‘Y’ is
Reason Alkynes contain two pi bonds, while alkenes have only one bond.
C2 is rotated anti-clockwise 120o about the C2-C3 bond. The resulting conformer is
(A) Partially eclipsed
(A) Bromine, CCl4
(B) H2, Lindlar catalyst
(C) Dilute H2SO4, HgSO4
(D) Ammoniacal CuCl2 solution
Identify X, Y and Z in the following synthetic scheme and write their structures.
CH3CH2CC-H Y Z
Is the compound Z optically active? Justify your answer.
(a) H+ in the first step
(b) Cl+ in the first step
(c) OH− in the first step
(d) Cl+ and OH− single step
(a) Both are highly ionic.
(b) One is oxidising and the other is reducing.
(c) One of the steps is endothermic in both the cases.
(d) All the steps are exothermic in both the cases.