Containing Sm (III), Eu (III), Gd (III), Cd (II) Metal Ions In The Synthesis Of New Complexes, Characterization And Nature

Acetate anion has been selected as bridging ligand and three novel complexes have been designed and synthesized, namely, the binuclear complexes [Gd2 (pydno)2(CH3COO)2(SCN)4(H2O)6] (1),[Sm2(pydno)2(CH3COO)2(SCN)4(H2O)6] (2) and [Eu2(pydno)2(CH3COO)2(SCN)4(H2O)6] (3); A one-dimensional chain complex {[Cd(ADM)2(H2O)2]·2H2O}n (4) with 1-amino-2,2-dicyanoethene-1-mercapto anion (ADM) as bridging ligand has been designed and synthesized; With pyrazine-2-carboxylate-4-N-oxide as bridging ligand, a one-dimensional chain complex [Cd(pyzno)2]n (5) and a three-dimensional polymer [Cd(pyzno)(SCN)]n have been designed and synthesized. The six novel complexes were characterized by elemental analysis and IR spectra, and their crystal structures determined by X-ray crystallography. The variable-temperature magnetic susceptibilities of complexes (1) were measured and the magnetic data were analyzed. The main creativities of this study are as follows: 1. The more magnetic coupling information dealing with Gd(III) ions and acetate anion as bridging ligand has been obtained. 2. The first complex with 1-amino-1-mercapto-2,2-dicyanoethene anion as ligand has been designed and synthesized, and the structure of the one-dimensional complex {[Cd(ADM)2(H2O)2]?2H2O}n has been studied, in which 1-amino-1-mercapto-2,2-dicyanoethene anion was used as bridging ligand. 3. The complexes with 2-carboxylate-4-N-oxide-pyrezine as ligand have first been synthesized, and the structure of one-dimensional complex [Cd(pyzno)2]n using pyzno as bridging ligand and the structure of three-dimensional complex [Cd (pyzno)(SCN)]n with pyzno and SCN? as bridging ligand have been studies.