Preparation and valence tautomeric behavior of a cobaltdioxolene complex with a new TTF-functionalized phenanthroline Ligand

In this study, a new tetrathiafulvalene-functionalized phenanthroline ligand (TTF-phen) and a mononuclear cobalt(II) complex with a redox active 3,6-di-tert-butylsemiquinonato (3,6-dtsq) ligand was synthesized. Magnetic measurementsand IR spectroscopy suggested that the Co complex [Co(3,6- dtsq)2(TTF-phen)] exhibited thermally induced valence tautomerismin the temperature range 130400 K. This complex is the first example of a valence tautomeric complex with a TTFfunctionalized ligand.