Synthesis and characterization of piano-stool ruthenium complexes with N,N′-pyridine imine bidentate ligands and their application in styrene oxidation
dc.contributor.author | Gichumbi, Joel M. | |
dc.contributor.author | Friedrich, Holger B. | |
dc.contributor.author | Omondi, Bernard | |
dc.date.accessioned | 2020-11-03T07:24:32Z | |
dc.date.available | 2020-11-03T07:24:32Z | |
dc.date.issued | 2016-04 | |
dc.description.abstract | The new complexes [(η6-arene)RuCl(C5H4N-2-CH N-R)]PF6 (arene = C6H6 with R = 4- flourophenyl (1), 4-chlorophenyl (2), 4-bromophenyl (3), 4 -iodophenyl (4), 2, 5-dichlorophenyl (5) or p-cymene with R = 4-flourophenyl (6), 4-chlorophenyl (7), 4-bromophenyl (8), 4- iodophenyl (9), 2, 5 - dichlorophenyl (10)) have been synthesized by reacting the ruthenium arene precursors [(η6-arene)Ru(μ-Cl)Cl]2, with the N,N′-bidentate ligands in a 1:2 ratio. Full characterization of all complexes was accomplished using 1H and 13C NMR, elemental analyses, UV-Vis spectroscopy, thermal analysis, IR spectroscopy and single crystal x-ray structures for compounds 7 and 10. The single crystal structures confirmed coordination of the ligand to the ruthenium(II) centre. The Ru(II) centre has a pseudo-octahedral three legged piano stool geometry in which the arene ring occupies the apex of the stool and the ruthenium is coordinated to the N,N′-bidentate ligand and a chloride ligand at the base of the stool. Two polymorphs of 7 were identified. The synthesized Ru(II) complexes were tested as catalysts for the oxidation of styrene to benzaldehyde using NaIO4 as a co-oxidant. All complexes were active catalysts for styrene oxidation and they gave high yields of benzaldehyde as the major product. | en_US |
dc.identifier.citation | Journal of Organometallic Chemistry Volume 808, 15 April 2016, Pages 87-96 | en_US |
dc.identifier.uri | https://doi.org/10.1016/j.jorganchem.2016.02.015 | |
dc.identifier.uri | http://repository.chuka.ac.ke/handle/chuka/4998 | |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.subject | Ruthenium arene | en_US |
dc.subject | N,N-bidentate ligands | en_US |
dc.subject | Styrene oxidation | en_US |
dc.subject | Benzaldehyde | en_US |
dc.subject | Mechanism | en_US |
dc.title | Synthesis and characterization of piano-stool ruthenium complexes with N,N′-pyridine imine bidentate ligands and their application in styrene oxidation | en_US |
dc.type | Article | en_US |