Switching between κ2 and κ3 Bis(pyrazol-1-yl)acetate Ligands by Tuning Reaction Conditions: Synthesis, Spectral, Electrochemical, Structural, and Theoretical Studies on Arene-Ru(II) Derivatives of Bis(azol-1-yl)acetate Ligands
作者： Fabio Marchetti , Claudio Pettinari , Adele Cerquetella , Augusto Cingolani , Riccardo Pettinari
DOI: 10.1021/IC900463B
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摘要: New (arene)ruthenium(II) derivatives containing neutral HL or anionic L− ligands (arene = p-cymene benzene, in general, particular HL1 bis(pyrazol-1-yl)acetic acid and HL2 bis(3,5-dimethylpyrazol-1-yl)acetic acid) have been synthesized analytically spectrally characterized. The form coordinate ruthenium a chelating κ2-N,N′-bidentate fashion affording 1:1 of formula [Ru(arene)(HL)Cl]Cl, where the inner Cl can be replaced by phosphine. These show very high conductance values water, due to contribution H3O+ produced deprotonation −COOH fragment consequent formation 1:2 electrolytes such as [Ru(arene)(κ3-N,N′,O-L)]Cl2 species. However, remaining contain monoanion coordinating tripodal κ3-N,N′,O-tridentate fashion. solid-state X-ray structure complex [Ru(η6-p-cymene)(κ3-N,N′,O-L1)]PF6 confirmed behavior. redox properties those compounds been...
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