Nucleophilicity of halide ions in molten quaternary ammonium salts

The relative rates of nucleophilic displacement by halide ions from tetra-n-pentylammonium cations in the molten tetrapentylammonium salts at 180°(Cl–:Br–:I–= 620:7·7:1) reflect the enhanced nucleophilicity expected for unsolvated, unassociated halide ions.