The nucliphilic substituation of primary alkyl chlorides wityh sodium acetate is cataysed by sodium iodide. Explain why.

Explanation

`R - Cl + CH_(3) COONa rarr R - O overset(O) overset(||)(-C-)CH_(3) + NaCl`
This reaction is `SN^(2)`, Nucleophile is `CH_(3)COO^(o-)`.
But in alkyl chloride `(C-Cl)` is a strong bond and is difficult to break. But in teh presence of `Nal, (R-Cl)` is converted to `(R-1)` (Finkelstein reaction) and in `(R-1)`, the `(C-I)` bond is weak which can be easily cleaved, So `SN^(2)` reaction is cataysed in the presence of `Nal `R - Cl + Nal rarr R-1 + NaCl`