Crystal structure and spectral characterization of dimethylthallium (III) complexes with 2-mercaptonicotinic acid and esters

• Authors: Monica Toma , Agustín Sánchez , María García-Tasende , José Casas , José Sordo , Eduardo Castellano , Javier Ellena
• Languages of publication: EN

Abstracts

EN

Synthesis, spectral properties and crystal structure of dimethylthallium(III) complexes with 2-mercaptonicotinic acid (2mna), 2-mercapto-methyl-nicotinate (2mmn), 2-mercapto-ethyl-nicotinate (2men) and 2-mercapto-isopropyl-nicotinate (2min) are reported. The compounds were characterized using IR, multinuclear NMR (1H,13C,205Tl) and mass spectrometry (electrospray, ES-API). The molecular structures of [TlMe2(2mna)]·H2O, (1), [TlMe2(2mmn)], (2), [TlMe2(2men)], (3) and [TlMe2(2min)], (4) were determined by the single-crystal X-ray diffraction. In 1, the monodeprotonate O,S-bidentate ligand chelates one dimethylthallium (III) unit and simultaneously bridges (O and S) between two of these organometallic units. The Tl-O1′ and Tl-S″ interactions are leading to polymeric chain linked in a three-dimensional network by the hydrogen bonds formed between the water molecule and the oxygen O (2) atom of the acid. The thallium atom is in a distorted octahedral environment with a [TlC2O2S2] kernel. Compounds 2, 3 and 4 are similar, in all the cases already mentioned the ligand is NH deprotonated and is strongly coordinated to two dimethylthallium (III) units through the N and S atoms. Two additional weak interactions with the O and S atoms lead to a [TlC2NOS2] kernel for the metal atom, in which the coordination polyhedron is a very distorted octahedron with the methyl groups occupying the apical positions.

Keywords

EN

dimethylthallium(III); 2-mercaptonicotinic acid; esters; complexes; crystal structure

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2004
• Volume: 2
• Issue: 3
• Pages: 534-552

Dates

published

1 - 9 - 2004

online

1 - 9 - 2004

Contributors

author

Monica Toma

• Department of Inorganic Chemistry, “Alexandru Ioan Cuza” University, RO-700506, Iasi, Romania

author

Agustín Sánchez

• Department of Inorganic Chemistry, University of Santiago de Compostela, 15782, Santiago de Compostela Galicia, Spain

author

María García-Tasende

• Department of Inorganic Chemistry, University of Santiago de Compostela, 15782, Santiago de Compostela Galicia, Spain

author

José Casas

• Department of Inorganic Chemistry, University of Santiago de Compostela, 15782, Santiago de Compostela Galicia, Spain

author

José Sordo

• Department of Inorganic Chemistry, University of Santiago de Compostela, 15782, Santiago de Compostela Galicia, Spain

author

Eduardo Castellano

• São Carlos Institute of Physics, University of São Paulo, 13560, São Carlos, SP, Brazil

author

Javier Ellena

• São Carlos Institute of Physics, University of São Paulo, 13560, São Carlos, SP, Brazil

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Identifiers

DOI

10.2478/BF02476206