Sodium Bis(2,9-dimethyl-1,10-phenanthroline)-μ-hydroxo-di(thiosulfato)dizinc(II) Pentahydrate Methanol Solvate

The title complex, triaqua-1κ³O-bis(2,9-dimethyl-1,10-phenanthroline)-2κ²N,N';3κ²N,N'-μ-hydroxo-2:3κ²O-di-μ-thiosulfato-1:3κ²O:S;2:3κ²O:S-sodiumdizinc(II) dihydrate methanol solvate [Zn₂(C₁₄H₁₂N₂)₂(μ-OH)(μ-S₂O₃)₂Na(H₂O)₃].2H₂O.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 S—S 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.

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