Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 8 (August 2004)

Acta Cryst. (2004). C60, m375-m381    [doi:10.1107/S0108270104014337]

Three zinc(II) complexes presenting a ZnN₆ chromophore and with peroxodisulfate as the counter-ion

M. A. Harvey, S. Baggio, A. Ibañez and R. Baggio

Abstract: The crystal structures of three Zn complexes with the peroxodisulfate anion (pds^2-) acting as counter-ion are reported, namely bis(2,2':6',2''-terpyridine-³N)zinc(II) hexaoxo--peroxo-disulfate(VI) dihydrate N,N-dimethylformamide solvate, [Zn(C₁₅H₁₁N₃)₂](S₂O₈)·2H₂O·C₃H₇NO or [Zn(tpy)₂](pds)·2H₂O·DMF, (I), bis[2,4,6-tris(2-pyridyl)-1,3,5-triazine-²N²,N⁴]zinc(II) hexaoxo--peroxo-disulfate(VI) dihydrate, [Zn(C₁₈H₁₂N₆)₂](S₂O₈)·2H₂O or [Zn(tpt)₂](pds)·2H₂O, (II), and bis[2,6-bis(1H-benzimidazol-2-yl-N³)pyridine]zinc(II) hexaoxo--peroxo-disulfate(VI) N,N-dimethylformamide trisolvate, [Zn(C₁₉H₁₃N₅)₂](S₂O₈)·3C₃H₇NO or [Zn(bbp)₂](pds)·3DMF, (III), where tpy is 2,2':6',2''-terpyridine, tpt is 2,4,6-tris(2-pyridyl)-1,3,5-triazine, bbp is 2,6-bis(1H-benzimidazol-2-yl)pyridine and DMF is N,N-dimethylformamide. The three structures are monomeric and present the Zn cation in a distorted octahedral environment, defined by two chelating tricoordinated ligands at almost right angles to each other. These cationic entities interact with an anionic network composed of hydrogen-bonded pds^2- anions and solvate water and DMF molecules via Coulombic forces, and with each other through a number of - and C=C contacts connecting the aromatic rings. The pds^2- anions stabilize the structures in unprecedented counter-ion behaviour.

Formula: [Zn(C₁₅H₁₁N₃)₂](S₂O₈)·2H₂O·C₃H₇NO, [Zn(C₁₈H₁₂N₆)₂](S₂O₈)·2H₂O and [Zn(C₁₉H₁₃N₅)₂](S₂O₈)·3C₃H₇NO

Online 21 July 2004

	Structure factor file (CIF format) (312.8 kbytes) Contains datablock I
	Structure factor file (CIF format) (322.9 kbytes) Contains datablock II
	Structure factor file (CIF format) (439.8 kbytes) Contains datablock III

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