(2-Amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)(ethane-1,2-diamine-κ2N,N′)(1H-imidazole-κN3)nickel(II) dihydrate

Abstract

In the title complex, [Ni(C8H5N5O3)(C2H8N2)(C3N2H4)]·2H2O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate (pterin) ligand, a bidentate ancillary ethane-1,2-diamine (en) ligand and a monodentate 1H-imidazole (im) ligand complete a distorted octahedral geometry around the NiII atom. The pterin ligand forms two chelate rings. Both the en and im ligands are arranged nearly orthogonally relative to the pterin ligand [dihedral angles between the mean planes of the en and pterin ligands and of the im and pterin ligands are 84.62 (9) and 85.14 (9)°, respectively]. N—H...N, N—H...O, O—H...N and O—H...O hydrogen bonds link the complex molecules and lattice water molecules into a three-dimensional network.