Bis[4-(2-carbamoylhydrazin-1-yl­idene-κ(2) N (1),O)-5-hydroxy­methyl-2-methyl­pyridinium-3-olato-κO (3)]cobalt(II) dinitrate dihydrate

The asymmetric unit of the title compound, [Co(C(9)H(12)N(4)O(3))(2)](NO(3))(2)·2H(2)O, consists of a discrete cationic [Co(PLSC)(2)](2+) complex unit [PLSC is 4-(2-carbamoylhydrazin-1-yl­idene)-5-hydroxy­methyl-2-methyl­pyridinium-3-ol­ato], two NO(3) (−) and two water mol­ecules. The two tridentate PLSC ligands of the cation are zwitterions related to each other by a non-crystallographic C (2) axis. The Co(II) ion is in a disorted octa­hedral coordination environment. The crystal structure is composed of alternating NO(3)/H(2)O and complex layers supported by extensive C—H⋯O, N—H⋯O and N—H⋯N hydrogen bonding.