μ-4,7-Dioxa-1,10-diazaoctane-1,1,10,10-tetraacetat0-1κ4O1,O1′,N1,O4:2κ4O7,N10,O10,O10′]bis[aquanickel(II)] dihydrate

Abstract

The Ni atom in the title complex, [Ni2(C14H20N2O10)(H2O)2]·2H2O or {[Ni2(egta)·2H2O]·2H2O}] [egtaH4 is 3,12-bis­(car­boxy­meth­yl)-6,9-dioxa-3,12-diaza­tetra­deca­nedioic acid], has a square-pyramidal coordination geometry. Both NiII centres are penta­coordinated by one N atom and three O atoms of egta, forming the basal plane, and one O donor water mol­ecule in the apical position. The dinuclear complex is arranged around an inversion centre. The solvent water mol­ecules and coordinated water mol­ecules are involved in hydrogen bonds with uncoordinated O atoms of carboxyl­ate groups, which link the complex mol­ecules to form a three-dimensional supra­molecular network structure.