1.

The best method for preparation of Me_(3)CCN is

Answer»

To react `Me_(3)COH` with `HCN`
To react `Me_(3)CBR` with NaCn
To react `Me_(3)CMgBr` with CICN
To react `Me_(3)CLI` with `NH_(2)CN`

Solution :It's a `S_(N)^(2)` reaction where `Me_(3)C-MgBr+Cl-CNrarrMe_(3)C-CN+Mg(Cl)Br`


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