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| Titel: |
A TRICHLORO-BRIDGED DIRUTHENIUM (II, III) COMPLEX: PREPARATION, PROPERTIES AND X-RAY STRUCTURE OF TRI(-μ-CHLORO) DICHLOROCARBONYLTRIS (TRIPHENYLPHOSPHINE)DIRUTHENIUM(II, III) |
| Auteur: |
Batista, Alzir A. Porcu, Ornella M. Nascimento, Otaciro R. Barbosa, Valma M. Oliva, Glaucius |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 30 (1993) nr. 3-4 pagina's 345-355 |
| Jaar: |
1993-12-01 |
| Inhoud: |
The triply chloro-bridged binuclear complex [Ru2Cl5(CO)(PPh3)3]·CH2Cl2, (PPh3 = triphenylphosphine), Mr = 1279.23, prepared from the precursor compound [RuCl3(PPh3)2DMA]·DMA (DMA = N,N'-dimethylacetamide) and crystallizes in the monoclinic space group P21/c. The structure was solved from 6994 independent reflections for which I > 3σ(I) by Patterson and difference Fourier techniques and refined to a final R = 0.042. The complex is formed by two Ru atoms bridged through three chloride anions. One Ru atom is further coordinated to two non-bridging Cl atoms and a triphenylphosphine ligand, whereas the other is bonded to two PPh3 ligands and a carbon monoxide molecule. The presence of RuIII was confirmed by EPR data. The absence of an intervalence charge-transfer transition (IT) in the near-infrared spectrum suggests that the binuclear complex is of a localized valence type. The IR spectrum shows a νCO band at 1964cm- and νRu-Cl bands at 328, 280 cm-1, corresponding to chlorides at terminal positions and 250, 225 cm-1 for the bridged ones. Two redox processes, RuII/RuII (E1/2 = -0.29 V) ← RuII/RuIII ← (E1/2 = 1.19 V) RuIII/RuIII, were observed by cyclic voltammetry. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 116 gevonden artikelen
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