A general synthetic route for the preparation of high-spin molecules: Replacement of bridging hydroxo ligands in molecular clusters by end-on azido ligands
- 作者：Giannis S. Papaefstathiou ; Athanassios K. Boudalis ; Theocharis C. Stamatatos ; Constantinos J. Milios ; Constantinos G. Efthymiou ; Catherine P. Raptopoulou ; Aris Terzis ; Vassilis Psycharis ; Yiannis Sana
- 关键词：Di-2-pyridyl ketone-based ligands ; End-on azido ligands ; Enneanuclear cobalt(II) and nickel(II) clusters ; Ferromagnetic exchange interactions ; High-spin molecules ; N-cyanato-bridged clusters
- 刊名：Polyhedron
- 出版年：2007
- 期刊代码：87_02775387
- 类别：ch
- 出版时间：15 June 2007
- 卷：26
- 期：9-11
- 页码：2089-2094
- 文件大小：687 K
摘要
A general method of increasing the ground-state total spin value of a polynuclear 3d-metal complex is illustrated through selected examples from cobalt(II) and nickel(II) cluster chemistry that involves the dianion of the gem-diol form of di-2-pyridyl ketone and carboxylate ions as organic ligands. The approach is based on the replacement of hydroxo bridges, that most often propagate antiferromagnetic exchange interactions, by the end-on azido ligand, which is a ferromagnetic coupler.