Valence tautomerism in a cobalt-verdazyl coordination compound
Coordination of 1-isopropyl-3,5-dipyridyl-6-oxoverdazyl to cobalt results in a dication best described in the solid state as a high spin cobalt(ii) ion coordinated to two radical ligands with an S = 3/2 ground state. On dissolution in acetonitrile, the cobalt(ii) form equilibrates with a cobalt(iii) valence tautomer with an S = 1/2 ground state.
National Science Foundation
Connor Fleming, Dorothy Chung, Servando Ponce, David J.R. Brook, Jeffrey Daros, Raja Das, Andrew Ozarowski, and Sebastian A. Stoian. "Valence tautomerism in a cobalt-verdazyl coordination compound" Chemical Communications (2020): 4400-4403. https://doi.org/10.1039/d0cc01770a