PIERPONT, CG JUNG, OS 2024-01-21T20:36:46Z 2024-01-21T20:36:46Z 2022-01-11 1995-08-02 0020-1669 https://pubs.kist.re.kr/handle/201004/145017 Equilibria between Co-III(bpy)(3,5-DBSQ)(3,5-DBCat) and Co-II(bpy)(3,5-DBSQ)(2) redox isomers have been studied in toluene solution and in the solid state. Enthalpy changes are nearly the same in both media, and Delta H is determined by changes in Co-O,N bond energies with the transition from low-spin Co(III) to high-spin Co(II). Temperature dependence of equilibria is associated with a large entropy change, resulting primarily from low-frequency shifts in vibrational modes with metal reduction. English AMER CHEMICAL SOC METAL-COMPLEXES SEMIQUINONE LIGANDS ENTROPY CHANGES REDOX COUPLES CATECHOLATE THERMODYNAMIC PARAMETERS FOR COBALT-QUINONE ELECTRON-TRANSFER AND SPIN TRANSITION STEPS OF THE CO-III(BPY)(3,5-DBSQ)(3,5-DBCAT)/CO-II(BPY)(3,5-DBSQ)(2) VALENCE TAUTOMERIC EQUILIBRIUM Article 10.1021/ic00120a041 1 INORGANIC CHEMISTRY, v.34, no.16, pp.4281 - 4283 INORGANIC CHEMISTRY 34 16 4281 4283 scie scopus A1995RM88900041 2-s2.0-0001057511 Chemistry, Inorganic & Nuclear Chemistry Note METAL-COMPLEXES SEMIQUINONE LIGANDS ENTROPY CHANGES REDOX COUPLES CATECHOLATE