Two series of thirty-two aryl arylmercury studies were synthesized by the reaction of arylmercuric chloride with thiophenol or 4-methylthiophenol in ethanol. Twenty-two of them are new compounds The UV and 1H NMR spectra of these compounds show that a good linear relationship exists between the Dlmax and Hammett substituent constant sp both for the two series of the title compounds, but the conjugation does not entirely extend over the sulfur atom to the whole mol. The substituent effect on 1H NMR was also studied.

Key words: PROTON MAGNETIC RESONANCE SPECTROMETRY, ULTRAVIOLET SPECTROPHOTOMETRY, SUBSTITUENT EFFECT, PHENYLMERCURIC CHLORIDE, BENZENETHIOL