Pentadentate thiosemicarbazones as versatile chelating systems. A comparative structural study of their metallic complexes.
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.
Pedrido
Rosa
R
Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia E-15782, Spain.
González-Noya
Ana M
AM
Romero
Maria J
MJ
Martínez-Calvo
Miguel
M
Vázquez López
Miguel
M
Gómez-Fórneas
Esther
E
Zaragoza
Guillermo
G
Bermejo
Manuel R
MR