The resonating structures of isocyanate ion ( $NCO^{-}$ ) are

$O = C = N^{-}$ ⟷ $O^{-} - C \equiv N$ ⟷ $O^{+} \equiv C - N^{2 -}$
(I) (II) (III)
Choose the most stable resonating structure of NCO^– and give oxidation states of O, C and N is that order.

Question

The resonating structures of isocyanate ion ( $NCO^{-}$ ) are

$O = C = N^{-}$ ⟷ $O^{-} - C \equiv N$ ⟷ $O^{+} \equiv C - N^{2 -}$

(I) (II) (III)

Choose the most stable resonating structure of NCO^– and give oxidation states of O, C and N is that order.

TestHub · Accepted Answer

Most stable resonance structure (II) has negative charge on more electronegative oxygen. Oxidation states: O(-2), C(+4), N(-3).

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