Reactions of 2-(arylazo)aniline with ruthenium substrates: Isolation, characterizations and reactivities of delocalized diazoketiminato and orthometallated Ru(II) chelates |
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Authors: | Jahar Lal Pratihar Shantanu Bhaduri Poulami Pattanayak Debprasad Patra Surajit Chattopadhyay |
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Institution: | aDepartment of Chemistry, University of Kalyani, Kalyani 741 235, India |
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Abstract: | Reactions of 2-(arylazo)aniline, HL-NH2 H represents the dissociable protons upon complexation and HL-NH2 is p-RC6H4N NC6H4-NH2; R = H for HL1-NH2; CH3 for HL2-NH2 and Cl for HL3-NH2] with Ru(H)(CO)(PPh3)3Cl and Ru(CO)3(PPh3)2 afforded products of compositions (HL-NH)Ru(CO)Cl(PPh3)2] and (L-NH)Ru(PPh3)2(CO)], respectively. All the complexes were characterized unequivocally. The X-ray structures of the complexes 4c and 5c have been determined. The cyclic volatammograms exhibited one reversible oxidative response in the range of 0.56–0.16 V versus SCE for (L-NH)Ru(PPh3)2(CO)] and a quasi reversible oxidative response within 0.56–0.70 V versus SCE for (HL-NH)Ru(CO)Cl(PPh3)2]. The conversion of ketones to corresponding alcohols has been studied in presence of newly synthesized ruthenium complexes. |
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Keywords: | 2-(Arylazo)aniline Ruthenium Cycloruthenation Redox Hydrogen transfer reaction |
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