Ground-State Interactions between Ruthenium(II)−Diimine Complexes and Phenol and Monochlorophenols in Aqueous Solution - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Inorganic Chemistry Année : 1998

Ground-State Interactions between Ruthenium(II)−Diimine Complexes and Phenol and Monochlorophenols in Aqueous Solution

Résumé

Ground-state interactions between Ru(bpy)32+ (bpy = 2,2‘-bipyridine) or Ru(bpz)32+ (bpz = 2,2‘-bipyrazine) and phenol (PhOH) or monochlorophenols (ClPhOH) have been investigated in aqueous (D2O) solution by NMR. The upfield shifts of the resonances and the NOE difference spectra of the complexes in the presence of the phenols indicate the presence of offset face-to-face π-stacking interactions between the phenol and the aromatic ligands. Electron withdrawal from the phenol ring by the monochloro substituent and less effective solvation by aqueous (compared to acetonitrile) media favor the interaction. The formation constant for the 1:1 Ru(bpy)32+−PhOH complex is estimated to be ∼0.01 M-1; K is smaller for Ru(bpz)32+ than for Ru(bpy)32+, and it increases for both complexes in the order PhOH < 4-ClPhOH < 3-ClPhOH < 2-ClPhOH.

Dates et versions

hal-03021996 , version 1 (24-11-2020)

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Cang Li, Morton Z Hoffman, Christine Pizzocaro, Gilles Mailhot, Michèle Bolte. Ground-State Interactions between Ruthenium(II)−Diimine Complexes and Phenol and Monochlorophenols in Aqueous Solution. Inorganic Chemistry, 1998, 37 (12), pp.3078-3082. ⟨10.1021/ic971471y⟩. ⟨hal-03021996⟩
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