2-(2'-PYRIDYL)QUINOXALINE-(L) AS A BIDENTATE LIGAND - CRYSTAL-STRUCTURE MAGNETIC-PROPERTIES AND QUANTUM-CHEMICAL STUDY OF [CU2CL4L2]

被引：24

作者：

BAKALBASSIS, EG

MROZINSKI, J

PERLEPES, SP

HADJILIADIS, N

LIANZA, F

ALBINATI, A

机构：

[1] WROCLAW B BEIRUT UNIV,INST CHEM,PL-50383 WROCLAW,POLAND

[2] UNIV PATRAS,DEPT CHEM,GR-26500 PATRAI,GREECE

[3] UNIV IOANNINA,DEPT CHEM,GR-45110 IOANNINA,GREECE

[4] UNIV MILAN,INST CHIM FARMACEUT & TOSSICOL,I-20131 MILAN,ITALY

来源：

POLYHEDRON | 1994年 / 13卷 / 23期

关键词：

D O I：

10.1016/S0277-5387(00)83383-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The X-ray crystal structure of the complex [Cu(2)Cl(4)L(2)], where L is 2-(2'-pyridyl)quinoxaline, has been determined. The structure consists of dimeric molecules [Cu(2)Cl(4)L(2)], in which copper ions are bridged by two chloride ligands. The geometry at copper can be described as either a distorted square-pyramidal or a distorted trigonal-bipyramidal. Magnetic susceptibility and EPR data give evidence for exchange coupling with the best fit to the data of the dimeric expression for a pair of exchange-coupled S = 1/2 ions yielding g = 2.134, 2J = - 10 cm(-1) and zJ' = -2 cm(-1). The investigations of the ground-state electronic structure of the complex and its precursor ligand L, along with an orbital interpretation of the magnetic coupling based upon extended Huckel molecular: orbital calculations, are also presented.

引用

页码：3209 / 3218

页数：10