阴离子配体（X）对双核LCuDgX3·nH2O配合物（LH2代表源自2-羟基-3-甲氧基苯甲醛的四齿席夫碱配体，X为Cl、N3C2和CF3COO）的性质和磁性的影响

Influence of anionic ligands (X) on the nature and magnetic properties of dinuclear LCuDgX3.nH2O complexes (LH2 standing for tetradentate Schiff base ligands deriving from 2-hydroxy-3-methoxybenzaldehyde and X being Cl, N3C2, and CF3COO).

作者信息

Costes J P, Dahan F, Dupuis A

机构信息

Laboratoire de Chimie de Coordination du CNRS, UPR 8241, liée par conventions à l'Université Paul Sabatier et à l'Institut National Polytechnique de Toulouse, France.

出版信息

Inorg Chem. 2000 Jan 24;39(2):165-8. doi: 10.1021/ic990865h.

DOI:10.1021/ic990865h

PMID:11272520

Abstract

The monometallic precursor L1Cu (L1H2 standing for 1,3-bis((3-methoxysalicylidene)amino)-2,2'-dimethylpropane) reacts with GdC13 x 6H2O to afford a dinuclear complex which crystallizes in the orthorhombic space group Pca2(1) (No. 29) in a cell having the dimensions a = 9.0246(11) A, b = 16.5198(14) A, c = 20.286(2) A, and Z = 4. Analysis of the structural data shows that it may be formulated as [L1CuCl2Gd(H2O)4]Cl x 2H2O. The cationic dinuclear unit possesses a CuO2Gd bridging core which is almost planar. The complex displays a ferromagnetic interaction (10.1 cm(-1) which is the largest yet reported for a structurally characterized dinuclear (Cu-Gd) complex. Lower magnetic interactions are observed for neutral L1CuGdX3 x H2O complexes (X = N3C2, CF3COO). Consideration of the magnetic and structural data obtained for various dinuclear (Cu-Gd) complexes leads to a correlation between the magnitude of the magnetic interaction and the exponential of the dihedral angle between the two halves of the CuO2Gd bridging core.

摘要

单金属前体L1Cu（L1H2代表1,3-双（（3-甲氧基水杨基亚氨基）-2,2'-二甲基丙烷））与GdC13·6H2O反应生成一种双核配合物，该配合物在正交晶系空间群Pca2(1)（编号29）中结晶，晶胞参数为a = 9.0246(11) Å，b = 16.5198(14) Å，c = 20.286(2) Å，Z = 4。结构数据分析表明，其化学式可能为[L1CuCl2Gd(H2O)4]Cl·2H2O。阳离子双核单元具有一个几乎呈平面状的CuO2Gd桥连核心。该配合物表现出铁磁相互作用（10.1 cm(-1)，这是结构表征的双核（Cu-Gd）配合物中报道的最大数值）。对于中性的L1CuGdX3·H2O配合物（X = N3C2，CF3COO），观察到较低的磁相互作用。对各种双核（Cu-Gd）配合物获得的磁学和结构数据进行考量，得出磁相互作用的大小与CuO2Gd桥连核心两半部分之间二面角的指数之间存在相关性。