μ-Acetato-di-μ-hydroxo-bis{acetato[bis(2-pyridyl)amine]cobalt(III)} acetate tetrahydrate: a novel mixed-bridged dinuclear CoIIIcomplex with bis(2-pyridyl)amine as terminal ligands

Abstract

The complex cation of the title compound, [Co2(C2H3O2)3(OH)2(C10H9N3)2](C2H3O2)·4H2O, has a [Co2(μ-OH)2(μ-OAc)(OAc)2(bpa)2]+ dimeric core [bpa is bis(2-pyridyl)amine and OAc is acetate], in which two CoIII centers are linked by two OH− and one OAc− bridges with a Co⋯Co separation of 2.8276 (10) Å. Each CoIII ion has an approximate octahedral geometry, coordinated by two pyridyl N atoms of the terminal bpa ligand, and four O-atom donors derived from two OH− bridges, one OAc− bridge and a monodentate coordinated OAc− anion. Intramolecular and intermolecular hydrogen-bonding interactions stabilize this structure.