The synthesis, crystal structures and SOD activities of a new ligand (Lse) and Co(Lse)2(SCN)2 complex [Lse = selenium ether bis‐(N‐1‐methyl‐ benzotriazole)]

A new ligand containing selenium, Se (CH2-N-Btrzole)2 (Lse) (Btrzole = benzotriazole) and its cobalt(II) complex, Co(Lse)2(SCN)2, have been synthesized and the molecular structures of the title compounds have been determined by X-ray techniques. The Lse is a meso-configuration with a symmetric plane through the Se center, the intermolecular weak interactions of SeSe, SeN and ππ stacking between benzotriazole rings to extend the molecular structure to two-dimensional network configuration. In the Co(II) complex, the metal center is in a six-coordinated octahedral environment. Two Co(II) atoms are linked by two ligands to form a 20-membered macrocycle; the adjacent macrocycles are linked by coordinated bond of CoNbentrozole to extend an infinite double strained chain. The SOD activity of the ligand and Co(II) complex have been studied by using the pyrogallol autoxidation method; thermal properties and luminescent properties of Co(II) complex have been tested, and the details of those properties have been discussed. Copyright © 2007 John Wiley & Sons, Ltd.