mu-Hydroxo-mu-phenolato Dinuclear Zinc(II) and Nickel(II) Complexes Derived from Dinucleating Compartmental Ligands of 'End-off' Type:Synthesis,Structures,and Properties

摘要

Some dinucleating compartmental ligands of "end-off" type,2,6-bis{N-[(2-dimethylamino)ethyl]iminomethyl}-4-methylphenol (HL~1),2,6-bis{N-(2-pyridylethyl)iminomethyl}-4-methylphenol (HL~2),and 2,6-bis{N,N-di(2-pyridyl-methyl)aminomethyl}-4-methylphenol (HL~3),have afforded the following dinuclear Zn(II) and Ni(II) complexes:[Zn_2(L~1)(OH)(py)_2](ClO_4)_2 (1),[Zn_2(L~2)(OH)(py)_3](ClO_4)_2 (2),[Zn_2(L~3)(OH)](ClO_4)_2 (3),[Ni_2(L~1)(OH)(py)_2](ClO_4)2 (4),and [Ni_2(L~2)(OH)(py)_4](ClO_4)_2 (5).X-ray crystallographic studies for l centre dot Pr~2OH,2 centre dot 0.5Pr~2OH,3 centre dot MeCN,4 centre dot py,and 5 indicate that they have a dinuclear core doubly bridged by the endogenous phenolic oxygen of each compartmental ligand and by exogenous hydroxide oxygen.Physicochemical properties of 1-5 are studied.