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Lodide is a better nucleophile than brom...

Lodide is a better nucleophile than bromide.

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When the nucleophilic centres are different and belong to the same group of periodic table, nucleophilicity is antiparallel to basicity.
Acidity : `Hl gt HBr`
Basicity : `I^(Ө) lt Br^(Ө)`
Nucleophilicity : `I^(Ө) gt Br^(Ө)`.
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