Journal article
(Original article)


Mechanistic studies on the formation of Pt(II) hydroformylation catalysts in imidazolium-based ionic liquids


Publication Details
Author(s): Illner P, Zahl A, Puchta R, van Eikema Hommes N, Wasserscheid P, van Eldik R
Publisher: Elsevier
Publication year: 2005
Volume: 690
Journal issue: 15
Pages range: 3567-3576
ISSN: 0022-328X

Abstract

The kinetics of the formation of the active species cis-[Pt (PPh)Cl(SnCl)] and cis-[Pt (PPh)(SnCl)] from the hydroformylation catalyst precursor cis-[Pt(PPh )Cl] in the presence of SnCl, was studied in two different imidazolium-based ionic liquids. A large range of different chlorostannate melts consisting of 1-butyl-3-methyl-imidazolium cations and [SnCl] anions with varying molar fraction of SnCl, were prepared and characterized by H and Sn NMR. The observed chemical shifts point to major changes in the composition of the anionic species within the melt. The second ionic liquid employed, viz., 1-butyl-3-methyl-imidazolium-bis(trifluormethylsulfonyl)amide was prepared in a colorless quality that enabled its application in kinetic studies. The concentration and temperature dependence of the substitution of Cl by [SnCl] to yield cis-[Pt(PPh )Cl(SnCl)], could be studied in detail. Theoretical (DFT) calculations were employed to model the reaction progress and to resolve the role of the ionic liquid in the activation of the catalyst. The available results are presented and a plausible mechanism for the formation of the catalytically active species is suggested. © 2005 Elsevier B.V. All rights reserved.



How to cite
APA: Illner, P., Zahl, A., Puchta, R., van Eikema Hommes, N., Wasserscheid, P., & van Eldik, R. (2005). Mechanistic studies on the formation of Pt(II) hydroformylation catalysts in imidazolium-based ionic liquids. Journal of Organometallic Chemistry, 690(15), 3567-3576. https://dx.doi.org/10.1016/j.jorganchem.2005.03.029

MLA: Illner, Peter, et al. "Mechanistic studies on the formation of Pt(II) hydroformylation catalysts in imidazolium-based ionic liquids." Journal of Organometallic Chemistry 690.15 (2005): 3567-3576.

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