Spectrophotometric study of the complex formation of 3-(2-hydroxyphenyl)-2-mercaptopropenoic acid with Ni(II) and Zn(II)

Solute–solvent and solvent–solvent interactions in binary solvent mixtures. Part 5. Preferential solvation of solvatochromic indicators in mixtures of propan-2-ol with hexane, benzene, ethanol and methanol

“…(14)] are, in general, higher than the ones calculated by the method proposed by Kamlet and Taft [eqn. (13)] and also higher than the literature values. Table 6 shows that these two last sets of values agree very well, although in fact, the literature values have been mostly calculated by the pairs of indicators methods.…”

“…This table includes two experimental values of β, one (β 13 ) calculated using eqn. (13) and the other (β 14 ) calculated by eqn. (14).…”

Empirical treatment of solvent-solute interactions: medium effects on the electronic absorption spectrum of ?-carotene

“…In the case of the Beckman DU-7 spectrophotometer, data acquisition was carried out with the program DUMOD. 24 Smoothing of the spectra and determination of the absorption maxima were performed using our software. It was established that the absorption maxima obtained with two different solutions, prepared on different dates and examined with both spectrophotometers, were coincident to within AE0.1 nm.…”

Interactions of Diorganolead(IV) with 3-(2-Thienyl)-2-sulfanylpropenoic Acid and/or Thiamine: Chemical and in Vitro and in Vivo Toxicological Results

“…7 This is probably also the form present in the solid state, although evidence for this is scarce 8 because of the formation of disulfides upon crystallization of H 2 L. 9 H 2 L are more easily deprotonated than R-mercaptoacetic acid, the ease of deprotonation depending on the aryl substituent on C(3), especially in the case of the -SH group. 10,11 Both HLand L 2form very stable complexes with metal ions. Usually (see, e.g., ref 12), though not always, 9 L 2is O, S-coordinated to the metal ion in a five-membered chelate ring (II, Scheme 1).…”