Ruthenium Mediated C-H Activation of 2-(Arylazo)phenols: Characterization of an Intermediate and the Final Organoruthenium Complex
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- 作者：Parna Gupta ; Swati Dutta ; Falguni Basuli ; Shie-Ming Peng ; Gene-Hsiang Lee ; and Samaresh Bhattacharya
- 刊名：Inorganic Chemistry
- 出版年：2006
- 出版时间：January 9, 2006
- 年：2006
- 卷：45
- 期：1
- 页码：460 - 467
- 全文大小：176K
- 年卷期：v.45,no.1(January 9, 2006)
- ISSN：1520-510X
文摘
Reaction of 2-(arylazo)phenols with [Ru(PPh3)2(CO)2Cl2] affords a family of organometallic complexes of ruthenium(II) of type [Ru(PPh3)2(CO)(CNO-R)], where the 2-(arylazo)phenolate ligand (CNO-R; R = OCH3, CH3, H, Cl, andNO2) is coordinated to the metal center as tridentate C,N,O-donor. Another group of intermediate complexes oftype [Ru(PPh3)2(CO)(NO-R)(H)] has also been isolated, where the 2-(arylazo)phenolate ligand (NO-R) is coordinatedto the metal center as bidentate N,O-donor. Structures of the [Ru(PPh3)2(CO)(NO-OCH3)(H)] and [Ru(PPh3)2(CO)(CNO-OCH3)] complexes have been determined by X-ray crystallography. All the complexes are diamagnetic andshow characteristic 1H NMR signals and intense MLCT transitions in the visible region. Both the [Ru(PPh3)2(CO)(NO-R)(H)] and [Ru(PPh3)2(CO)(CNO-R)] complexes show two oxidative responses on the positive side of SCE.