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

The title compound, [Co(C6H12O4)2]·H2O, was prepared by mild heating of an aqueous solution. The CoII ion 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 distinct N,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)2 mol­ecule is connected simultaneously to six neighbouring Co(bicH2)2 and two guest water mol­ecules by hydrogen bonding.