A COBALT 1-AMINOCYCLOHEXANECARBOXYLATE COMPLEX

The crystal structure of di-mu-hydroxo-bis[bis(1-aminocyclohexanecarboxylato-N,O)cobalt(III)]-I-aminocyclohexanecarboxylic acid-water (1/2/4), [CO2(C7H12NO2)4(OH)2].2C7H13NO2.4H2O, contains two asymmetric units related through a center of symmetry. Each molecule contains two hexacoordinate Co atoms, each of which is chelated to two bidentate I-aminocyclohexanecarboxylato ligands. The Co atoms are linked by two hydroxo bridges. This results in two slightly distorted octahedral coordination polyhedra, which have an edge in common. In each polyhedron the N atoms are in cis positions. Each asymmetric unit is completed by an uncoordinated molecule of the ligand, in the zwitter-ionic form, and by two water molecules, which are involved in hydrogen bonding. The hydrogen-bonding scheme may also involve the amino groups of the free ligand molecule.