Aucamp, DanielleWitteler, TimDielmann, FabianSiangwata, ShepherdLiles, David C.Smith, Gregory S.Bezuidenhout, Daniela Ina2017-04-032017-03Aucamp, D, Witteler, T, Dielmann, F, Siangwata, S, Liles, DC, Smith, GS & Bezuidenhout, DI 2017, 'A triarylated 1,2,3-triazol-5-ylidene ligand with a redox-active ferrocenyl substituent for rhodium(I)-catalyzed hydroformylation of 1-octene', European Journal of Inorganic Chemistry, vol. 2017, no. 9, pp. 1227-1236.1434-1948 (print)1099-0682 (online)10.1002/ejic.201700164http://hdl.handle.net/2263/59632A series of rhodium(I)–1,2,3-triazol-5-ylidene (trz) complexes are described, containing either a novel triarylated trz ligand A′ (N1, N3-arylated, C4-ferrocenyl) {complexes 1, [Rh(A′)Cl(cod)]; 4, [Rh(A′)Cl(CO)2]}, or N3-alkylated triazolylidenes with a C4-ferrocenyl {2, [Rh(B′)Cl(cod)]; 5, [Rh(B′)Cl(CO)2]} or C4-phenyl substituent {3, [Rh(C′)Cl(cod)]; 6, [Rh(C′)Cl(CO)2]}. The free mesoionic carbene (MIC) A′ is structurally characterized and its electronic properties evaluated by employing the complex [Pd(Br)2(iPr2-bimy)(A′)] (7) in an NMR spectroscopic analysis method. The redox activity of A′ is exploited, and the chemically oxidized precursor Aox and complex 4ox are isolated. The mesoionic carbene complexes 1– 3, as well as in situ oxidized 1ox, are used as homogeneous catalysts for the hydroformylation of 1-octene for the first time, and the influence of chemical oxidation of the catalyst on the activity and chemo- and regioselectivity of the catalyst precursor 1 is evaluated.en© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the pre-peer reviewed version of the following article : A triarylated 1,2,3-triazol-5-ylidene ligand with a redox-active ferrocenyl substituent for rhodium(I)-catalyzed hydroformylation of 1-octene, European Journal of Inorganic Chemistry, vol. 2017, no. 9, pp. 1227-1236, 2016. doi : 10.1002/ejic.201700164. The definite version is available at : http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-0682c.Influence of chemical oxidationNMR spectroscopic analysis methodChemical oxidationMesoionic carbene (MIC)Postprint Article