Alkyl Halides - Result Question 67
68. Show by chemical equations only, how would you prepare the following from the indicated starting materials? Specify the reagents in each step of the synthesis.
(1979, 2M)
(i) Chloroform from carbon tetrachloride.
(ii) Hexachloroethane $\left(C _2 Cl _6\right)$ from chloroform.
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Solution:
- (i) $ CS_2 + Cl_2 \longrightarrow CCl_4 + S_2Cl_2 $
$ C_2S_2 + 2 S_2Cl_2 \longrightarrow CCl_4 + 6 S$
$ CCl _4+2[H] \xrightarrow{Fe / H _2 O} \underset{\substack{\text { (Carbon tetrachloride) }}}{CHCl _3+HCl}$
(ii) $ CaC _2+H _2 O \longrightarrow C _2 H _2+Ca(OH) _2 $
$ C _2 H _2 \xrightarrow{H _2 / Ni} C _2 H _6 \xrightarrow[h \nu]{Cl _2 \text { (excess) }} \underset{\text { (Hexachloroethane) }}{Cl _3 C-CCl _3}$
BETA
