In an aprotic solvent, which relative order best describes the nucleophilicity of the halide ions?
Bromide 
Chloride 
Fluoride
Bromide 
Chloride 
Fluoride
Bromide 
Chloride 
Fluoride
Bromide 
Chloride 
Fluoride
Text Solution
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In an aprotic solvent, the increasing order for the nucleophilicity of the halide ions is iodide 
bromide 
chloride 
flouride. A polar aprotic solvent does not form hydrogen bond with nucleophiles to a significant extent, meaning that the nucleophiles have greater freedom in solution. Under these conditions, nucleophilicity correlates well with basicity and fluoride ion, being the most unstable of the halide ions, reacts fastest with electrophiles.
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