Synthesis, crystal structure and magnetic properties of a new binuclear copper(II)-copper(II) complex of a macrocyclic oxamide
Titel:
Synthesis, crystal structure and magnetic properties of a new binuclear copper(II)-copper(II) complex of a macrocyclic oxamide
Auteur:
Ouyang, Yan Yu, Li-Hua Liao, Dai-Zheng Jiang, Zong-Hui Yan, Shi-Ping
Verschenen in:
Journal of coordination chemistry
Paginering:
Jaargang 58 (2005) nr. 15 pagina's 1361-1367
Jaar:
2005-10
Inhoud:
The binuclear metal complex [Cu(μ-exoO2)cyclamCu(bpy)](ClO4)2·H2O (bpy = 2,2'-bipyridine and (exoO2)cyclam = 1,4,8,11-tetraazacyclotradecanne-2,3-dione) has been synthesized and characterized by single-crystal X-ray analysis and spectroscopic and magnetic measurements. The structure consists of homobinuclear [Cu(μ-exoO2)cyclamCu(bpy)]2+ cations, a weakly coordinated water molecule and perchlorate ions. In each binuclear unit, Cu1, coordinated by four nitrogen atoms of the macrocyclic organic ligand is connected to Cu2 via the exo-cis oxygen atoms of the macrocyclic ligand with Cu···Cu separations of 5.151 Å; Cu2 assumes square-pyramidal geometry. Magnetic properties measured at 2-300 K show antiferromagnetic exchange between adjacent copper(II) ions.