Synthesis, Structure, and Magnetic Properties of Tetranuclear Copper(II) Complexes of Tridentate Dianionic Ligands with anONODonor Set
作者:
Hiromi Yamashita,
Masayuki Koikawa,
Tadashi Tokii,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 342,
issue 1
页码: 63-68
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008038245
出版商: Taylor & Francis Group
关键词: Tridentate Ligand;Tetranuclear Copper(II) Complex;X-Ray Crystallography;Magnetic Susceptibility;Antiferromagnetic Interaction
数据来源: Taylor
摘要:
Tetranuclear complexes [CuL2H]4(1), [CuL2Me]4(2), and [CuL2Cl]4(3) with a reduced Schiff base type tridentate ligand H2L2H and its homologous with a substituent on the 2-hydroxymethylphenyl moiety (4-Me, H2L2Me; 4-Cl, H2L2Cl) were prepared and characterized by elemental analyses and magnetic measurements. The crystal structure of1was determined by X-ray crystallography. Tetracopper core is represented as a dimer-of-dimers structure by the stacking of two dicopper units bridged by alcoholic oxygens. One of the dicopper units contains square pyramidal (SP) Cu(II) ions, whereas the geometry of each Cu(II) ion in the other unit is described as essentially distorted trigonal bipyramid (TBP). Magnetic behaviors of the complexes are explained by modified equation based on the theoretical Spin Hamiltonian. The exchange integrals (-2J) are evaluated at 292–366 cm−1for SP dicopper cores and 104–120 cm−1for TBP, respectively, indicating the existence of different type of antiferromagnetic interaction-pathways corresponded to each copper geometry.
点击下载:
PDF (291KB)
返 回