1.

The best method for preparation of Me_(3)"CC"Nis

Answer»

to REACT `Me_(3)COH` with HCN
to REAT `Me_(3)CBr` with NaCN
to react `Me_(3)CM_(g)Br` with CICN
to react `Me_(3)Cli` with `NH^(2)` CN

Solution :It is a `S_(N)2` reaction .
`Me_(3)C-MgBr+CI-CN rarrMe_(3)C-CN+Mg(CI)Br`


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