Reactions of 2-(arylazo)aniline with ruthenium substrates: Isolation, characterizations and reactivities of delocalized diazoketiminato and orthometallated Ru(II) chelates
摘要:
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)(3)Cl 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. (C) 2009 Elsevier B.V. All rights reserved.
Reactions of 2-(arylazo)aniline with ruthenium substrates: Isolation, characterizations and reactivities of delocalized diazoketiminato and orthometallated Ru(II) chelates
摘要:
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)(3)Cl 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. (C) 2009 Elsevier B.V. All rights reserved.