The archetypal temperature-driven valence tautomeric process ‘Co^III(Cat)(SQ)’ ⇌ ‘Co^II(SQ)₂’ (spin state of cobalt changes from S = 0 to S = 3/2), where Cat²⁻ and SQ^·− are catecholato and semiquinonato redox-level, respectively, of the redox-active catecholate. Research on valence tautomerism has made notable advancement not only with new cobalt-catecholate systems but also with other metal ions and new redox-active ligands. The process is associated with changes in the charge distribution. Here some recent results on metal complexes of redox-active catecholates (only selected recent examples), o-amidophenolate and o-phenylenediamide ligands are presented.

原型温度驱动价互变异构过程'Co ^III（Cat）（SQ）'⇌'Co ^II（SQ）₂ '（钴的自旋状态从S = 0变为S = 3/2），其中Cat ^2-和SQ ^{· -}是儿茶酚和semiquinonato氧化还原水平，分别为氧化还原活性的儿茶酚。对价互变异构的研究不仅在新的儿茶酚酸钴体系上取得了显着进展，而且在其他金属离子和新的氧化还原活性配体上也取得了显着进展。该过程与电荷分布的变化相关。在此，有关氧化还原活性儿茶酚盐，邻氨基苯酚盐和邻氨基苯酚的金属配合物的一些最新结果提出了-苯二酰胺配体。