Interaction of the organometallic derivatives of the nitrothiophenols with dimethyl sulfoxide

1. Comparison of electronic spectra has brought out the effect of polar and conformational factors in the behavior of the organometallic derivatives of the nitrophenols and nitrothiophenols. 2. Interaction of these compounds with DMSO does not lead to the formation of ion pairs, but rather results in the establishment of equilibria between molecular complexes and ions. 3. The values of the constants for complexing with DMSO fall off in the order: ArSHgPh > ArSH, ArSSbPh2 > ArSPbPh3 > ArSSbPh4 > ArSSnPh3. 4. The dissociation constants for the various compounds fall off in the order: ArSSbPh4 > ArSSnPh3 > ArSH > ArSPbPh3, ArSSbPh3. The nitrothiophenolate of phenylmercury does not dissociate in DMSO.