Bis(2,4,6-triamino-1,3,5-triazin-1-ium)bis(pyridine-2,6-dicarboxylato) zincate(II) decahydrate

The reaction of zinc(II) nitrate tetrahydrate with the proton-transfer compound LH(2) [LH(2) is (tataH)(2)(pydc), where tata is 2,4,6-triamino-1,3,5-triazine (melamine) and pydcH(2) is pyridine2,6-dicarboxylic acid] in aqueous solution leads to the formation of the title compound, (tataH)(2)[Zn(pydc)(2)]. 10H(2)O or (C(3)H(7)N(6))(2)[Zn(C(7)H(3)O(4))(2)]. 10H(2)O. The Zn(II) atom has a distorted octahedral coordination environment. Extensive intermolecular N-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonding involving the tataH and pydc ligands and the water molecules forms an extended three-dimensional network.