Synthesis, Characterization and X‐ray Structures of [α‐Diphenylethanedione bis(4‐ethylthiosemicarbazonato)]palladium(II) and 1,2,4‐Triazine‐3‐thione–Zinc(II) Complexes Obtained by Metal‐Induced Cyclization

Autor: Pilar Souza, César J. Pastor, Ana I. Matesanz
Přispěvatelé: UAM. Departamento de Química Inorgánica
Rok vydání: 2007
Předmět:
Zdroj: Biblos-e Archivo. Repositorio Institucional de la UAM
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ISSN: 1099-0682
1434-1948
DOI: 10.1002/ejic.200700619
Popis: This is the peer reviewed version of the following article: European Journal of Inorganic Chemistry 34 (2007): 5433-5438, which has been published in final form at http://dx.doi.org/10.1002/ejic.200700619. This article may be used for non-commercial purposes in accordance With Wiley-VCH Terms and Conditions for self-archiving
The new cyclic 5-ethoxy-4-ethyl-5,6-diphenyl-4,5-dihydro-2H-[1,2,4]- triazine-3-thione ligand (HTa3T-Et) has been obtained by an intramolecular cyclization reaction of α-diphenylethanedione bis(4- ethylthiosemicarbazone) (H2BbTSC-Et). The cyclization may be promoted either by hydroxylic solvents or by ZnII ions. Thus, the reaction of H2BbTSC-Et with ZnCl2 led to the formation of [Zn(HTa3T-Et)2Cl2] containing not the ligand H 2BbTSC-Et but the cyclic HTa3T-Et ligand that forms during the reaction. On the other hand, crystallization of H2BbTSC-Et from DMSO/EtOH produces a cocrystal containing the open-chain H2BbTSC-Et ligand together with the cyclic HTa3T-Et molecules, which are linked to a DMSO molecule by hydrogen bonds. However, reaction of the cocrystal with Pd II ions yields a planar tetracoordinate complex in which only the H2BbTSC-Et ligand, in the deprotonated form, is present. The preparation and molecular structures of these compounds are discussed
We are grateful to Ministerio de Sanidad y Consumo, Instituto de Salud Carlos III (PI040354) of Spain for financial support
Databáze: OpenAIRE
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