Question

Why the reaction of RX with AgNO2 gives nitro alkane where as with NaNO2 gives alkyl nitrite?

Answer 1

Potassium nitrite (KNO2) is predominantly ionic and one of the oxygen atoms has a negative charge (O=N−O−K+). Nucleophilic attack through this negatively charged oxygen atom mainly gives alkyl nitrite. ... In short, nucleophilic attack takes place through nitrogen; hence, nitroalkanes are obtained as chief products.

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