Abstract
The reaction of MCl 2 · 2H 2O (M = Cu, Zn) with 2,3,5,6-tetra(2-pyridyl)pyrazine (tppz) (referred hereafter as L) in 2:1 molar ratio in acetonitrile at room temperature afforded binuclear complexes [M 2(κ 3-L)Cl 4] [Cu ( 1), Zn ( 2)] where the ligand is bis-tridentate manner. The complexes have been characterized by elemental analyses, FAB-MS, IR, EPR, NMR and electronic spectral studies. Solid state structures of both the [Cu 2(κ 3-L)Cl 4] · 5H 2O ( 1), [Zn 2(κ 3-L)Cl 4] · H 2O ( 2) have been determined by single crystal X-ray analyses. A well-resolved uudd cyclic water tetramer and water monomer were reported in the crystal host of [Cu 2(κ 3-L)Cl 4] · 5H 2O ( 1) and [Zn 2(κ 3-L)Cl 4] · H 2O ( 2) showing the contribution of the water cluster to the stability of the crystal host 1 and 2.
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