Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 765, Issue -, Pages 1-7Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2014.04.024
Keywords
Dinuclear complexes; Chelating ligand; Half-sandwich complexes; Amidation reaction; Beckmann rearrangement; Catalysis
Categories
Funding
- Swiss National Science Foundation [200020_140212]
- Swiss Confederation
- Swiss National Science Foundation (SNF) [200020_140212] Funding Source: Swiss National Science Foundation (SNF)
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The reaction in dichloromethane between the chloro-bridged complexes [(eta(6)-p-(PrC6H4Me)-Pr-i)(2)Ru-2(mu-Cl)(2)Cl-2], [(eta(5)-C5Me5)(2)Rh-2(mu-Cl)(2)Cl-2] and [(eta(5)-C5Me5)(2)Ir-2(mu-Cl)(2)Cl-2], and the ligand precursor, 3,3'-[(1E,1'E)-{(methylenebis(4,1-phenylene))bis(azanylylidene)}bis(ethan-1-yl-1-ylidene)]bis(4-hydroxy-6-methyl-2H-pyran-2-one) (LH2), has yielded the corresponding neutral dinuclear Ru(II), Rh(III) and Ir(III) complexes of the formula [((eta(6)-p-(PrC6H4Me)-Pr-i)RuCl}(2)L] (1), [{(eta(5)-C5Me5)RhCl}(2)L] (2) and [{(eta(5)-C5Me5)IrCL)(2)L] (3). The complexes were characterized by elemental analysis, infrared, H-1 NMR, C-13 NMR, ESI mass spectrometry, and complexes 2 and 3 by single-crystal X-ray structure analysis. All complexes were used as catalysts under different reaction conditions for the formation of amides from aldehydes in the presence of NH2OH center dot HCl and NaHCO3. All complexes show good conversion with catalytic turnover numbers up to 500. (C) 2014 Elsevier B.V. All rights reserved.
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