Pentadentate thiosemicarbazones as versatile chelating systems. A comparative structural study of their metallic complexes
作者:Rosa Pedrido、Ana M. González-Noya、Maria J. Romero、Miguel Martínez-Calvo、Miguel Vázquez López、Esther Gómez-Fórneas、Guillermo Zaragoza、Manuel R. Bermejo
DOI:10.1039/b810601k
日期:——
We have prepared some transition and post-transition metal complexes derived from the pentadentate thiosemicarbazone ligand bis(4-N-ethylthiosemicarbazone)-2,6-diacetylpyridine H2LEt, by both chemical and electrochemical procedures. The complexes have been synthesised and fully characterised, including the crystal structures for the ligand H2LEt and its manganese, cadmium and lead complexes. We have also performed multinuclear 109Ag, 113Cd, 119Sn and 207Pb 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.
我们采用化学和电化学方法,制备了一些过渡金属和后过渡金属配合物,这些配合物来自五齿硫代氨基甲酰肼配体双(4-N-乙基硫代氨基甲酰肼)-2,6-二乙酰基吡啶 H2LEt。这些配合物已经合成并完全表征,包括配体 H2LEt 及其锰、镉和铅配合物的晶体结构。我们还分别对银、镉、锡和铅化合物进行了多核 109Ag、113Cd、119Sn 和 207Pb 研究。此外,我们在此对五齿硫代氨基甲酰肼配合物的不同结构进行了比较研究,试图检查不同因素(如实验程序、金属大小、配体结构和金属氧化态)对所形成配合物的最终结构的影响。我们的目标是更好地了解五齿硫代氨基甲酰肼配体的配位趋势。