title: Pentadentate thiosemicarbazones as versatile chelating systems. A comparative structural study of their metallic complexes.
abstract: We have prepared some transition and post-transition metal complexes derived from the pentadentate thiosemicarbazone ligand bis(4-N-ethylthiosemicarbazone)-2,6-diacetylpyridine H(2)L(Et), by both chemical and electrochemical procedures. The complexes have been synthesised and fully characterised, including the crystal structures for the ligand H(2)L(Et) and its manganese, cadmium and lead complexes. We have also performed multinuclear (109)Ag, (113)Cd, (119)Sn and (207)Pb studies for silver, cadmium, tin and lead compounds, respectively. Moreover we present here a comparative study on the different structures found for pentadentate thiosemicarbazonate complexes, trying to check the influence of different factors, such as experimental procedure, size of metal, structure of the ligand, and metal oxidation state, on the final structure of the complex formed. Our aim is gaining a better insight into the coordination trends of pentadentate thiosemicarbazone ligands.
authors.affiliation: Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia E-15782, Spain.
authors.forename: Rosa
authors.initials: R
authors.lastname: Pedrido
authors.forename: Ana M
authors.initials: AM
authors.lastname: González-Noya
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Romero
authors.forename: Miguel
authors.initials: M
authors.lastname: Martínez-Calvo
authors.forename: Miguel
authors.initials: M
authors.lastname: Vázquez López
authors.forename: Esther
authors.initials: E
authors.lastname: Gómez-Fórneas
authors.forename: Guillermo
authors.initials: G
authors.lastname: Zaragoza
authors.forename: Manuel R
authors.initials: MR
authors.lastname: Bermejo