Cobalt(II) and zinc(II) compounds with unsaturated ligands derived from 2-aminobenzothiazole

Four zinc(II) (6, 8, 10 and 12) and four cobalt(II) (5, 7, 9 and 11) compounds derived from N-(benzothiazol-2-yl)-dithiocarbamic methyl ester (1) (5 and 6), 1-benzothiazol-2-ylid-3-methyl-thiourea (2) (7 and 8), 1-benzothiazol-2-yl-2,3-dimethyl-iso thiourea (3) (9 and 10) and N-(benzothiazol-2-yl)-S,S'-dimethyl-dithio-carboimine (4) (11 and 12) are reported. The complexes were characterized in the solid state by UV-Vis-NIR diffuse reflectance, IR, mass spectrometry and compounds 5, 9-12 by X-ray single crystal diffraction analyses. In all cases two ligand molecules are bonded to a tetracoordinated metal atom. In compounds 5-10 the ligand is anionic and bidentate with the metal atom in the center of spirocyclic structures formed by two planar unsaturated six membered rings. In compounds 7-10 the metal atom is linked to four nitrogen atoms and in 5 and 6 to two sulfur and two nitrogen atoms. In compounds 11 and 12 the ligand is neutral and monodentate and the metal ion remains coordinated to the chlorine atoms. (C) 2004 Elsevier Ltd. All rights reserved.