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The role of trinuclear species in a palladium acetate/trifluoroacetic acid catalytic system

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Abstract

Reactions catalyzed by palladium(II) acetate and trifluoroacetic acid (TFA) have a clear preactivation phase. However, the structure of real catalytic species remains unclear. We show that the key species are cyclic trinuclear complexes of composition [Pd3(OAc)6−x(OTFA)x] (x = 1–6) formed by a sequential ligand exchange from [Pd3(OAc)6]. Furthermore, we prove that the trinuclear palladium backbone of the precatalyst remains preserved during the first phase of the C–H activation reaction of acetanilides. In other words, the reaction pathway including the trinuclear species should be taken into account in discussion about mechanisms of the reactions catalyzed by palladium acetates.

Graphical abstract: The role of trinuclear species in a palladium acetate/trifluoroacetic acid catalytic system

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Publication details

The article was received on 12 Oct 2017, accepted on 01 Nov 2017 and first published on 01 Nov 2017


Article type: Paper
DOI: 10.1039/C7DT03832A
Citation: Dalton Trans., 2017, Advance Article
  • Open access: Creative Commons BY license
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    The role of trinuclear species in a palladium acetate/trifluoroacetic acid catalytic system

    J. Váňa, J. Lang, M. Šoltésová, J. Hanusek, A. Růžička, M. Sedlák and J. Roithová, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT03832A

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