Crystal structure of bis[N,N-bis(2-hydroxyethyl)glycinato-κ3O1,N,O2]cobalt(II) monohydrate

Abstract

The title compound, [Co(C6H12O4)2]·H2O, was prepared by mild heating of an aqueous solution. The CoIIion has a slightly distorted octahedral coordination environment which is defined by two N atoms occupying the apical position, while the equatorial plane is furnished by two hydroxy O atoms and two carboxylate O atoms. The four hydroxy O atoms from two distinctN,N-bis(2-hydroxyethyl)glycine (bicH2−) ligands act as hydrogen-bond donors with two carboxylate O atoms as acceptors to form O—H...O hydrogen-bonded layers extending parallel to (100). In addition, the guest water molecule acts as both a hydrogen-bond donor and acceptor, so that each Co(bicH2)2molecule is connected simultaneously to six neighbouring Co(bicH2)2and two guest water molecules by hydrogen bonding.