Abstract
Two solvent-induced trinuclear nickel(II) clusters, [{NiL(CH 3OH)} 2(OAc) 2Ni]·2CH 3OH ( I) and [{NiL(C 2H 5OH)} 2(OAc) 2Ni]·2C 2H 5OH ( II), have been synthesized by the reaction of a new Salen-type bisoxime chelating ligand of 5,5′-di( N, N′-diethylamino)-2,2′-[(1,3-propylene)dioxybis(nitrilomethylidyne)]diphenol (H 2L) with nickel(II) acetate tetrahydrate in different solvents. Clusters I and II were characterized by elemental analyses, IR spectra, UV–vis absorption spectra, TG–DTA and X-ray diffraction methods. In clusters I (or II), there are two ligand moieties (which provide N 2O 2 donors), two acetate ions, two coordinated methanol (or ethanol) molecules and two crystallizing methanol (or ethanol) molecules, which result in the formation of three slightly distorted octahedral geometries around Ni(II) ions. Interestingly, nickel(II) ions in the structures of clusters I and II are all six-coordinated geometry, but clusters I and II are grown up in different solvent. Right because of this, solvent effect cause to their different crystal structures.
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