The Synthesis, Crystal Structure And Properties Investigations On Transition Metal-Sulfer Clusters

1. In this thesis, the studies on transition metal-sulfer clusters have been reviewed. Structural characterization and different series of these clusters are discussed in detail. At the same time, the achievements we have made has also been described.2. Three organic ligands containing sulphur atoms, 4-Phenyl-3 -[(1H-1,2,4 -triazol -1-yl) methyl] -1H-1,2,4-triazole-5-thione, 3-Benzyl-4-phenyl -1H-1,2,4-triazole -5(4H)-thione and 4-Phenyl-l-(propan-2-ylidene)thiosemicarbazide, which have not been reported, were synthesized and characterized by elemental analysis, IR spectra and X-ray diffraction analysis. The single crystal of 2-Mercaptobenzo thiazole was redetermined by single crystal X-ray diffraction analysis.3. Three novel ethyl mercaptan metal(â…¡) clusters, [M(μ₂-SCH₂CH₃)₂]₆(M=Fe,Co, Ni), with isomorphous double crown forms were synthesized and characterized by elemental analysis, IR, TG. and X-ray diffraction analysis showed that each metal atom is surrounded by four S atoms of the μ₂-SCH₂CH₃ ligands in a distorted square plane fashion. As a result, edge-sharing S₄ square plane connect to form a ring. The six metal atoms are located at the vertices of an almost hexagon. Six of the μ₂-sulfur atoms are above and the other six μ₂-sulfur atoms are below the plane through the six metal(â…¡) atoms. As a consequence, six metal(â…¡) atoms lie very close to the virtual C₆ symmetry and twelve μ₂-sulfur...