Synthesis and crystal structure of bis­(1H-benzo[d][1,2,3]triazole-κN (2)){2,2′-[N-(phenyl­phospho­r­yl­methyl-κO)aza­nedi­yl]di­acetato-κ(3) O,N,O′}cobalt(II)–1H-benzo[d][1,2,3]triazole (1/1)

In the title compound, [Co(C(11)H(12)NO(6)P)(C(6)H(5)N(3))(2)]·C(6)H(5)N(3), the 2,2′-[N-(phenyl­phospho­rylmethyl-κO)aza­nedi­yl]di­acetate dianion N,O,O′,O′′-chelates the Co(II) cation and two 1H-benzo[d][1,2,3]triazole mol­ecules coordinate to the Co(II) cation to complete the slightly distorted octa­hedral coordination. In the crystal, classical O—H⋯O, N—H⋯O hydrogen bonds and weak C—H⋯N hydrogen bonds link the mol­ecules into a three-dimensional supra­molecular architecture. π–π stacking between the triazole and benzene rings and between the benzene rings is also observed in the crystal.