New adducts of phthalocyaninatocobalt(II) with pyridine and 4-methylpyridine and their vibrational, magnetic, and electronic properties. Part I. Reactivity towards oxygen

Abstract
Different reaction temperatures have allowed the isolation of 1 : 1 and 1 : 2 adducts of phthalocyaninatocobalt(II) with pyridine and 4-methylpyridine. Thermal, vibrational, and magnetic-susceptibility analyses have provided useful information about the structural properties of these complexes; e.s.r. and electronic spectra have permitted a detailed investigation of the ligand-field levels of the cobalt atom. All the adducts react with oxygen and form, at low temperatures, well characterized Co : O2 1 : 1 adducts.

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