Abstract
The asymmetric unit of the title compound, [Co(C9H12-N4O3)(2)](NO3)(2)center dot 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 NO3- 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 NO3/H2O and complex layers supported by extensive C-H center dot center dot center dot O, N-H center dot center dot center dot O and N-H center dot center dot center dot N hydrogen bonding.