Select the ambident nucleophile from the following:
`(i) C bar(N) " " (ii) - CH_3 barO " " (iii) CNbarS`
`(iv) overset(* * )(NH_3) " " (V ) overset(* * )(PH_3) " " (vi )NO_(2)^(-)`

Explanation

To solve the question of selecting the ambident nucleophile from the given options, we need to understand what an ambident nucleophile is. An ambident nucleophile is a nucleophile that has two different atoms that can donate a pair of electrons to form a bond with an electrophile.

Let's analyze each option step by step:

1. **Option (i) CN⁻ (Cyanide Ion)**:
- The cyanide ion has a carbon atom (C) and a nitrogen atom (N).
- It can act as a nucleophile by attacking an electrophile through either the carbon or the nitrogen.
- Therefore, CN⁻ is an ambident nucleophile.
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