Question

what is decreasing order of nucleophilicity of fluorine bromine chlorine iodine

Answer 1

Answer:

In the polar aprotic solvent, the increasing order of nucleophilicity is I  

−

<Br  

−

<F  

−

.

Iodide ion has large size. The negative charge is dispersed on larger anion. Hence, it can be less readily donated.

In case of fluoride ion, the negative charge is on small fluoride ion and can be readily donated.

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