Abstract
The effect of substituents and temperature on the reactivity of a) arylacetylenes towards arenesulphonyl radicals and b) ar enesulphonyl chlor ides towards substituted phenyl radicals, was studied. Arenesulphonyl radicals were prepared from photolysis of arenesulphonyl iodides and substituted phenyl radicals from arenediazonium tetrafluoroborates. Relative reactivities correlate with Hammett and Brown substituent constants. Relative Arrhenius parameters were deter mined and its effects on the relative rates analised.
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