Ruthenium and palladium complexes incorporating amino-azo-phenol ligands: Synthesis, characterization, structure and reactivity

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题名:	Ruthenium and palladium complexes incorporating amino-azo-phenol ligands: Synthesis, characterization, structure and reactivity
作者:	賴重光;Pattanayak, Poulami;Parua, Sankar Prasad;Patra, Debprasad;Lai, C.-K.;Brandão, Paula;Felix, Vitor;Chattopadhyay, Surajit
贡献者:	理學院化學學系
关键词:	2-((2-Aminophenyl)azo)phenol;Crystal structure;C–C coupling reaction;C–N coupling reactions;Hydrogen transfer reaction;Pd(II) Ru(II)
日期:	2015-04-01
上传时间:	2026-04-21 14:35:06 (UTC+8)
出版者:	Elsevier BV;Elsevier B.V
摘要:	摘要： New amino-azo-phenol complexes of Pd(II) and Ru(II) were synthesized and unequivocally characterized. The palladium complexes exhibited catalytic activities toward C–C, C–N coupling and cyanation whereas the ruthenium complexes are active transfer hydrogen catalyst. [Display omitted] •New amino-azo-phenol complexes of Pd(II) and Ru(II).•The palladium complexes catalytised C–C, C–N coupling and cyanation reactions.•Ruthenium catalyzed transfer hydrogen reaction. The ligands 2-((2-aminophenyl)diazenyl)phenol, HOL1-NH2, 1a; 2-((2-aminophenyl)diazenyl)-5-methylphenol, HOL2-NH2, 1b; and 2-((2-aminophenyl) diazenyl)-5-chlorophenol, HOL3-NH2, 1c, which are abbreviated as HOL-NH2, 1, afforded the complexes of compositions [(OL-NH)Pd(PPh3)], 2, and [(OL-NH)Ru(CO)(PPh3)2], 3, upon reaction with Na2PdCl4 and Ru(CO)3(PPh3)3 respectively. In all the complexes the metals ions, Pd(II) or Ru(II), are coordinated by deprotonated ligand (OL-NH)2− in tridentate (N, N, O) fashion. X-ray structures of [(OL2-NH)Pd(PPh3)], 2b, and [(OL1-NH)Ru(CO)(PPh3)2], 3a, were determined to confirm the molecular structures. The cyclic voltammograms of [(OL-NH)Ru(CO)(PPh3)2] exhibited two quasi reversible oxidative response near 0.25 and 1.12V vs. SCE. The nature of HOMO as obtained by DFT calculations has been inspected to have an insight into the redox orbitals. The newly synthesized [(OL-NH)Pd(PPh3)], 2a, complexes exhibited catalytic activity toward the Suzuki, Heck, Cyanation and amination reactions. Catalytic activity of complex [(OL1-NH)Ru(CO)(PPh3)2], 3a, was examined for the conversion of ketones to corresponding alcohols by transfer hydrogen reactions. 出版者： Elsevier B.V 出版日期： 2015-04-01 出處： Inorganica Chimica Acta, 2015-04, Vol.429, p.122-131 版權： 2015 Elsevier B.V. 識別號： ISSN: 0020-1693 識別號： EISSN: 1873-3255 識別號： DOI: 10.1016/j.ica.2015.02.002
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