SULFUR COMPOUNDS

Author: LARDIÉS MIAZZA NORA.
Year: 2004.
University: ZARAGOZA.
Place of defense: FACULTAD DE CIENCIAS.
Place of preparation: FACULTAD DE CIENCIAS.

Summary: The synthesis of metal-containing ligands derived sulfur-giving has many applications in industry as in biology. The alquiniltiolatos (R-CÂ fourth C-S-) are interesting because they are intermediate reaction for obtaining compounds coordination with various metal centers, and more importantly, because generating units 1,3-ditiol-2-ona which are products heading for the synthesis of complex ditioleno and tetratiafulvalenos. This paper describes a) the synthesis of alquiniltiolato complex of gold (I), b) synthesis of complex ditioleno centers metallic Ni (II), Au (III) and Pd (II) with conductive properties and even, some cases have been observed superconductivity in addition to interesting optical properties with important applications in lasers switching factor Qyc) electrochemical polymerization of some of the complex obtained in the preceding two objectives, with the ligand thiophene in its structure, combining polymers drivers the electrical properties of metallic conductors with the many advantages of plastics. Currently drivers polymers are used in solar panels, computer chips, screens and TV monitors, sensors, batteries. Following the first goal have synthesized a large amount of alquiniltiolato complex of gold (I) mononuclear dinucleares and tetranucleares by opening amid core corresponding mono or a (1,2,3-tiadiazol) and subsequent coordination of alquiniltiolato formed with complex gold (I). In general are compounds that do not crystallize easily, but finally were obtained interesting structures, to highlight a six atoms (S-CÂ fourth C-CÂ fourth C-S) broadly in line. Following the second goal was synthesized complex ditioleno heterolépticos with phosphine bis-difenilfosfinoetano, homolépticos and complexes with ligands TTF-ditioleno Ni (II), Au (III) and Pd (II) with the substituents p-cianofenilo, 2-tiofeno and 3-thiophene. We obtained by attack nucleófilo the corresponding 1,3-ditiol-2-onas and coordination derivative cash. Following the third goal polimerizaron successfully those ligand complexes with thiophene in its structure with the position 5 and / or 2 without replacing through electrochemical synthesis by coupling at the anode, for it took place repetitive cycles from 0 V to the potential slightly higher than that oxidizes the thiophene ring, the formation of a new wave as well as the increase in intensity in each cycle, we show that the polymer has been formed at the working electrode. They are all stable and characterized pursuing their voltamogramas cyclical and electronic absorption spectroscopy using as a working electrode of ITO glass. We could not compute the energies of the optical band electrochemical or because the shape of the spectra was inappropriate.