Hydrocarbons - Result Question 72
####59. (a) Identify $(A),(B),(C),(D)$ and $(E)$ in the following schemes and write their structures :
(b) Identify $(X),(Y)$ and $(Z)$ in the following synthetic scheme and write their structures. Explain the formation of labelled formaldehyde $\left(H _2 C^{} O\right)$ as one of the products when compound $(Z)$ is treated with $HBr$ and subsequently ozonolysed. Mark the $C^{}$ carbon in the entire scheme. $BaC^{*} O _3+H _2 SO _4 \rightarrow(X)$ gas
$\left[C^{*}\right.$ denotes $C^{14}$ ]
$$ H _2 C=CH-Br \xrightarrow[\substack{\text { (ii) } X \ \text { (iii) } H _3 O^{+}}]{\text {(i) Mg/ether }}(Y) \xrightarrow{LiAlH _4}(Z) $$
(2001)
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Solution:
(a)
(b) $BaCO _3+H _2 SO _4 \longrightarrow \stackrel{*}{CO _2}+BaSO _4$
