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Reactions of 2-(arylazo)aniline with ruthenium substrates: Isolation, characterizations and reactivities of delocalized diazoketiminato and orthometallated Ru(II) chelates

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
694
Issue
21
Identifiers
DOI: 10.1016/j.jorganchem.2009.06.038
Keywords
  • 2-(Arylazo)Aniline
  • Ruthenium
  • Cycloruthenation
  • Redox
  • Hydrogen Transfer Reaction

Abstract

Abstract Reactions of 2-(arylazo)aniline, HL-NH 2 [H represents the dissociable protons upon complexation and HL-NH 2 is p-RC 6H 4N NC 6H 4-NH 2; R = H for HL 1-NH 2; CH 3 for HL 2-NH 2 and Cl for HL 3-NH 2] with Ru(H)(CO)(PPh 3) 3Cl and Ru(CO) 3(PPh 3) 2 afforded products of compositions [(HL-NH)Ru(CO)Cl(PPh 3) 2] and [(L-NH)Ru(PPh 3) 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(PPh 3) 2(CO)] and a quasi reversible oxidative response within 0.56–0.70 V versus SCE for [(HL-NH)Ru(CO)Cl(PPh 3) 2]. The conversion of ketones to corresponding alcohols has been studied in presence of newly synthesized ruthenium complexes.

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