Sodium bis(2,9-dimethyl-1,10-phenanthroline)-mu-hydroxo-di(thiosulfato)dizinc(II) pentahydrate methanol solvate

The title complex, triaqua-1 kappa(3)O-bis(2,9-dimethyl-1,10-phenanthroline)-2 kappa(2)N,N';3 kappa(2)N,N'-mu-hydroxo-2:3 kappa(2)O-di-mu-thiosulfato-1 :2 kappa(2)O: S;1: 3 kappa(2)O:S-sodiumdizinc(II) dihydrate methanol solvate, [Zn-2(C14H12N2)(2)(mu-OH)(mu S2O3)(2)Na(H2O)].2H(2)O.CH3OH, presents an unusual ten-membered ring containing three different metal centers, two zinc and one sodium, bridged by one hydroxo and two thiosulfate groups. The thiosulfate groups bridge through S and O atoms, with a mean SS bond length which is longer than that found in the free anion, with the corresponding S-O distances shorter Both zinc coordination spheres are tetrahedral, while that of the pentacoordinate sodium is distorted trigonal bipyramidal. The monomeric units are linked by strong hydrogen-bonding interactions into chains parallel to z, which in turn are held together by hydrogen-bonding contacts through some not fully occupied solvate molecule sites, as well as by van der Waals interactions.