Structure and magnetic properties of a neutral dimeric copper (II) complex of N-(2-hydroxybenzyl)glycinamide ligand

A copper (II) complex ([Cu-2(sglym)(2)(NO3)(2)]) of tridentate reduced Schiff base ligands, namely, (N-(2-hydroxybenzyl)-glycinamide (Hsglym) was synthesized and characterized in the solid state by single crystal x-ray diffraction techniques. The two Cu(II) atoms are bridged by two phenolate oxygen atoms in the neutral dimers and the geometry of Cu(II) can be described as a distorted square pyramid. The Cu-Cu distances are 3.020(2) Angstrom. The magnetic properties of the complex were studied at variable temperatures. Transition of spin state (from spin zero to spin one) was observed due to thermal excitation. This transition of spin state observed in the temperature range 100-400 K was accompanied by magnetic viscosity. (C) 2003 American Institute of Physics.