Zinc(II) and Nickel(II) Benzoate Complexes from the Use of 1-methyl-4,5-diphenylimidazole

[摘要] Two new complexes,[Zn(O2CPh)2(L)2]·2MeOH  (1·2MeOH)and[Ni2(O2CPh))4(L)2]·2MeCN  (2·2MeCN), have been synthesized and characterized by X-ray analysis in the course of an ongoing investigation of theMII/X−/L  [MII=Co,Ni,Cu,Zn;X−=Cl−,Br−,I−,NCS−,NO3   −,N3   −,PhCO2   −;L=1-methyl-4,5-diphenylimidazole] reaction system, aiming at understanding and assessing the relative strength and the way in which the intermolecular interactions control the supramolecular organization of these compounds. In the mononuclear complex1·2MeOH, the benzoate ion acts as a monodentate ligand resulting in a distorted tetrahedralN2O2coordination environment. Complex2·2MeCNexhibits a dinuclear paddle-wheel structure; eachNiIIhas a square pyramidalNiNO4chromophore with four benzoate oxygens in the basal plane and the pyridine-type nitrogen atom of one ligand L at the apex. The structure of1·2MeOHis stabilized by intramolecularπ-πinteractions between aromatic rings of adjacent 4,5-diphenylimidazole moieties; it is a feature also evidenced in similar compounds of the type[MX2L2].

[学科分类] 物理化学和理论化学