Organocyanide coordination chemistry: Syntheses, structural characterisations and magnetic properties of copper (II) complexes with a di-imine/pyridine ligand
| Autor: | Jean Sala-Pala, Benoıˆt Le Gall, P. Molinié, Estelle Vigier, Carlos J. Gómez-García, Nathalie Cosquer, Jean-Michel Kerbaol, Françoise Conan, Marek M. Kubicki |
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| Rok vydání: | 2005 |
| Předmět: |
chemistry.chemical_classification
Stereochemistry Imine chemistry.chemical_element Crystal structure Copper Coordination complex Inorganic Chemistry Metal Paramagnetism chemistry.chemical_compound Crystallography chemistry visual_art Pyridine Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Derivative (chemistry) |
| Zdroj: | Inorganica Chimica Acta. 358:2513-2522 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2005.02.011 |
| Popis: | The reactions between the copper (II) salts [CuXL]PF6 (L: 2,6-[1-(2,6-diisopropylphenylimino)ethyl]pyridine) (X = Cl 1, X = Br 2) and LiTCNQ, in a DMF/water mixture, or Et3NH(TCNQ)2, in acetone, produced the new complexes [CuXL(TCNQ)] (X = Cl 3, X = Br 4). For both compounds, crystallographic studies have clearly evidenced the existence of dimeric complexes [{CuClL}(TCNQ)]2 owing to π–π overlap between two adjacent TCNQ − radical anions. Compound 1 reacted with Et4N(C10N7) to afford the mononuclear derivative [CuClL(C10N7)] (5), while its reaction with K2C10N6 produced the dinuclear complex [(CuClL)2(C10N6)] (6). The crystal structures of complexes 5 and 6 have been determined by X-ray crystallography. Magnetic studies have revealed that compound 6 displays weak antiferromagnetic interactions between the two metal centres, conversely compounds 3 and 5 exhibit purely paramagnetic behaviours. |
| Databáze: | OpenAIRE |
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