Interaction of 3,5-dimethylpyrazole with cobalt(II) carboxylates containing coordinated 1,10-phenanthroline or 2,2′-dipyridyl

Abstract

The reaction of Co3(μ-OOCBut)6(NEt3)2 with 1,10-phenanthroline or 2,2′-dipyridyl in benzene at room temperature yields L2Co2(μ-OH2)(μ-OOCBut)4 complexes (L2 = Phen (1a) and Dipy (1b)). The reaction of n1a (1b) with 3,5-dimethylpyrazole gives a mixture of L2Co(Hdmpz)2(OOCBut)2 complexes (2a, 2b) and L2Co(Hdmpz)(OOCBut)2 (3a, 3b), and their yield is determined by the ratio of the initial reagents. As distinct from pivalates, for cobalt(II) phenanthroline-benzoate, only the (Phen)Co(Hdmpz)2(OOCPh)2 complex (4) has been isolated. The structures of the synthesized compounds have been determined by X-ray crystallography.