Hydrocarbons - Result Question 84
####72. Give the structures of $A, B$ and $C$ (explanation are not required)
(i) $A\left(C _4 H _8\right)$ which adds on $HBr$ in the presence and in the absence of peroxide to give same product.
(ii) $B\left(C _4 H _8\right)$ which when treated with $H _2 O / H _2 SO _4$ gives $C _4 H _{10} O$ which cannot be resolved into optical isomers.
(iii) $C\left(C _6 H _{12}\right)$, an optically active hydrocarbon which on catalytic hydrogenation gives an optically inactive compound $C _6 H _{14}$.
$(1993,1 M \times 3=3 M)$
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Solution:
- (i) $A$ must be a symmetrical alkene :
(ii)
(iii)
has one chiral carbon
