POLYSULFONYL AMINES .73. METAL(II) DIMESY LAMIDE TETRAHYDRATES - THE DIMESYLAMIDE ANION AS A MONODENTATE O-LIGAND AND A TETRAFUNCTIONAL HYDROGEN-BOND ACCEPTOR IN THE ISOTYPIC COMPLEXES [M(H2O)(4)((CH3SO2)(2)N)(2)], WHERE M=MAGNESIUM, NICKEL, COPPER, OR ZINC

By treating aqueous HN(SO2CH3)(2) solutions with the appropriate metal hydroxides, oxides, or carbonates, the crystalline tetrahydrates M[(C H3SO2)(2)N](2) . 4 H2O (M = Mg, Ca, Mn, Co, Ni, Cu, Zn, Cd) were obtai ned and analytically characterized. The crystal structures of the Mg, Ni, Cu and Zn compounds, as determined by single-crystal X-ray diffrac tion at low temperatures, reveal an isotypic series (triclinic, space group <P(1)over bar> , Z = 1). The structures consist of centrosymmetr ic trans-octa hedral [M(H2O)(4)[(CH3SO2)(2)N](2)] molecules in which t he anionic ligand acts as a monodentate O-donor. For the Mg, Ni and Zn complexes, the M-OH2 and M-O(anion) distances lie in the ranges 203-2 06 pm and 209-214 pm, respectively. The copper compound features a mar ked Jahn-Teller distortion with Cu-OH2 = 195.8 and 297.7 pm and Cu-O(a nion) = 232.5 pm. The cis-angles O-M-O of the four molecules do not de viate appreciably from 90 degrees. The complex units are associated th rough a highly organized three-dimensional hydrogen bond network in wh ich all the water protons act as donors and the non-coordinating oxyge n atoms and the nitrogen atom of the anionic ligand are involved as ac cepters. The H-bond pattern is subjected to a graph-theoretical analys is at the first and second levels.