3,5-Lutidine penta-aqua sulfate complexes of first-row transition metals: [M(3,5-lutidine)(H(2)O)(5)]SO(4), with M = Mn, Co, Ni, and Zn.

The reactions of MnSO(4)·H(2)O, CoSO(4)·7H(2)O, NiSO(4)·6H(2)O and ZnSO(4)·7H(2)O with 3,5-lutidine (3,5-di-methyl-pyridine) yield crystals of penta-aqua-(3,5-di-methyl-pyridine-κN)manganese(II) sulfate, [Mn(C(7)H(9)N)(H(2)O)(5)]SO(4), (1), penta-aqua-(3,5-di-methyl-pyridine-κN)cobalt(II) sulfate, [Co(C(7)H(9)N)(H(2)O)(5)]SO(4), (2), penta-aqua-(3,5-di-methyl-pyridine-κN)nickel(II) sulfate, [Ni(C(7)H(9)N)(H(2)O)(5)]SO(4), (3), and penta-aqua-(3,5-di-methyl-pyridine-κN)zinc(II) sulfate, [Zn(C(7)H(9)N)(H(2)O)(5)]SO(4), (4), which were characterized by single-crystal X-ray diffraction. The four crystals are isostructural, demonstrating near identical unit-cell parameters and atomic positions. The metal atoms are all octa-hedrally coordinated, with one lutidine ligand and five water ligands. The sulfate dianion hydrogen bonds with the coordinated water mol-ecules of the dicationic metal complex salts, generating infinite three-dimensional networks.