Ítem


New aqua N-heterocyclic carbene Ru(II) complexes with two-electron process as selective epoxidation catalysts: An evaluation of geometrical and electronic effects

New ruthenium complexes with general formula [RuII(T)(CN-Me)X] n+ (X = Cl- or H2O; T = 2,2′:6′, 2″-terpyridine, trpy, or N,N-bis(2-pyridyl)ethylamine, bpea; CN-Me = N-methyl-N′-2-pyridylimidazolium) have been prepared. The complexes obtained have been characterized in solution by spectroscopic (1D- and 2D-NMR and UV-vis) techniques, mass spectrometry, and elemental analysis. The chloro complexes have also been characterized by X-ray diffraction analysis. The redox properties of all the compounds were studied by CV revealing, for the reported Ru-OH2 complexes, bielectronic Ru(IV/II) redox processes throughout a wide pH range. The catalytic activity of aquo complexes was evaluated in the epoxidation of olefins using PhIO as oxidant, displaying in general good yields and high selectivities for the epoxide product. The influence of electronic and geometrical factors on the spectroscopic and electrochemical properties as well as on the catalytic activity is discussed. © 2013 American Chemical Society

This research has been financed by MINECO of Spain through Projects CTQ2010-21532-C02-01, CTQ2012-32436, and CTQ2009-08328

© Inorganic Chemistry, 2013, vol. 52, núm. 9, p. 5077-5087

American Chemical Society (ACS)

Autor: Dakkach, Mohamed
Atlamsani, Ahmed
Parella Coll, Teodor
Fontrodona, Xavier
Romero García, Isabel
Rodríguez Pizarro, Montserrat
Data: 2013
Resum: New ruthenium complexes with general formula [RuII(T)(CN-Me)X] n+ (X = Cl- or H2O; T = 2,2′:6′, 2″-terpyridine, trpy, or N,N-bis(2-pyridyl)ethylamine, bpea; CN-Me = N-methyl-N′-2-pyridylimidazolium) have been prepared. The complexes obtained have been characterized in solution by spectroscopic (1D- and 2D-NMR and UV-vis) techniques, mass spectrometry, and elemental analysis. The chloro complexes have also been characterized by X-ray diffraction analysis. The redox properties of all the compounds were studied by CV revealing, for the reported Ru-OH2 complexes, bielectronic Ru(IV/II) redox processes throughout a wide pH range. The catalytic activity of aquo complexes was evaluated in the epoxidation of olefins using PhIO as oxidant, displaying in general good yields and high selectivities for the epoxide product. The influence of electronic and geometrical factors on the spectroscopic and electrochemical properties as well as on the catalytic activity is discussed. © 2013 American Chemical Society
This research has been financed by MINECO of Spain through Projects CTQ2010-21532-C02-01, CTQ2012-32436, and CTQ2009-08328
Format: application/pdf
ISSN: 0020-1669 (versió paper)
1520-510X (versió electrònica)
Accés al document: http://hdl.handle.net/10256/11714
Llenguatge: eng
Editor: American Chemical Society (ACS)
Col·lecció: MICINN/PN 2011-2014/CTQ2010-21532-C02-01
Reproducció digital del document publicat a: http://dx.doi.org/10.1021/ic302863h
Articles publicats (D-Q)
És part de: © Inorganic Chemistry, 2013, vol. 52, núm. 9, p. 5077-5087
Drets: Tots els drets reservats
Matèria: Catalitzadors
Catalysts
Compostos heterocíclics
Heterocyclic compounds
Títol: New aqua N-heterocyclic carbene Ru(II) complexes with two-electron process as selective epoxidation catalysts: An evaluation of geometrical and electronic effects
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

Matèries

Autors