An electron spin resonance study of the dioxygen adduct of bis[2-(2′-pyridylmethylenehydrazonomethyl)phenolato]cobalt(II) and related materials

Abstract

The cobalt(II) chelates of 2-(2′-pyridylmethylenehydrazonomethyl)phenol and 2-(pyrrol-2′-ylmethylenehydrazonomethyl) phenol have low-spin forms in dimethylformamide and dimethylformamide containing pyridine. In these solvents the cobalt(II) chelates form reversible adducts with molecular oxygen. Spin-Hamiltonian parameters and linewidth terms have been evaluated from the e.s.r. spectral data of the low-spin forms of the cobalt(II) chelates and their adducts with molecular oxygen.