New dirhenium(III) compounds bridged by carboxylate ligands: N(C 4H 9) 4[Re 2 (OOCCF 3)Cl 6] and Re 2(OOCCCHCo 2 (CO) 6) 4Cl 2

Vega A.; Calvo, V.; Spodine, E.; Saillard J.-Y.; Manzur, J.

Keywords: chemistry, cluster, acid, crystal, reduction, binding, complex, geometry, structure, ligand, ray, rhenium, dimer, diffraction, signal, article, analysis, supramolecular, processing, potentiometry, derivative, chemical, cyclic, Reaction, X, carboxylic

Abstract

The solvothermal reaction of (N(C 4H 9) 4) 2 [Re 2Cl 8] with trifluoroacetic acid and acetic anhydride leads to the new rhenium trifluoroacetate dimer N(C 4H 9) 4 [Re 2(OOCCF 3)Cl 6] (1) and to the rhenium carbonyl dimer Re 2(? 2-Cl) 2(CO) 8 as the rhenium-reduced byproduct. The reaction of the precursor complex 1 N(C 4H 9) 4 [Re 2(OOCCF 3)Cl 6] (1), with the organometallic carboxylic acid (CO) 6CO 2HCCCOOH leads to the cluster of clusters compound Re 2(OOCCCHCo 2 (CO) 6) 4-Cl 2 (2), which has the dimer structure of Re 2(OOCR) 4Cl 2. Cyclic voltammetric measurements show that Re 2(OOCCCHCo 2 (CO) 6) 4Cl 2 (2) has one reduction centered on the dirhenium core and a reduction centered on the cobalt atoms. DFT calculations have been used to rationalize the observed displacements of the voltammetric signals in Re 2(OOCCCHCo 2 (CO) 6) 4Cl 2 (2) compared to the parent ligand (CO) 6CO 2HCCCOOH and rhenium pivalate.

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Título de la Revista: INORGANIC CHEMISTRY
Volumen: 41
Número: 21
Editorial: American Chemical Society
Fecha de publicación: 2002
Página de inicio: 5382
Página final: 5387
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-0037152391&partnerID=q2rCbXpz