Issue 17, 2009
From the journal:

Dalton Transactions

Sulfato-bridged ECE-pincer palladium(ii) complexes: structures in the solid-state and in solution, and catalytic properties†

Cornelis A. Kruithof,a   Alexsandro Berger,a   Harmen P. Dijkstra,a   Fouad Soulimani,b   Tom Visser,b   Martin Lutz,c   Anthony L. Spek,c   Robertus J. M. Klein Gebbink*a  and  Gerard van Koten*a  

* Corresponding authors

a Chemical Biology & Organic Chemistry, Debye Institute for NanoMaterials Science, Faculty of Science, Utrecht University, Padualaan 8, Utrecht, CH, The Netherlands
E-mail: r.j.m.kleingebbink@uu.nl, g.vankoten@uu.nl

b Inorganic Chemistry and Catalysis, Debye Institute for NanoMaterials Science, Faculty of Science, Utrecht University, Padualaan 8, Utrecht, CH, The Netherlands

c Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Sorbonnelaan 16, CA, Utrecht, The Netherlands

Abstract

ECE-pincer sulfato palladium complexes (pincer = [C6H3(CH2E)2-2,6]−; E = SPh (1), SMe (2), StBu (3), NMe2 (4)) were synthesized and characterized. In the solid-state (X-ray determinations) 3 and 4 exist as neutral ECE-pincer palladium sulfato complexes with a μ2-O,O′ bridging sulfato ligand. IR and Raman spectroscopic studies revealed that in the solid-state the complexes can be present as either solely neutral or as a mixture of neutral and ionic species, depending on the preparation and morphology of the solids. In water, ionic complexes with non-coordinating sulfate ions prevail. Preliminary studies of the catalytic activity of 2–4 in the Suzuki–Miyaura C–C cross-coupling reaction of 3-iodobenzoic acid and sodium tetraphenylborate in water reveal that the C–C cross-coupling product is efficiently formed in good yields at room temperature.

Graphical abstract: Sulfato-bridged ECE-pincer palladium(ii) complexes: structures in the solid-state and in solution, and catalytic properties

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Article information

DOI
https://doi.org/10.1039/B816936E
Article type
Paper
Submitted
01 Oct 2008
Accepted
12 Feb 2009
First published
10 Mar 2009

Dalton Trans., 2009, 3306-3314

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Sulfato-bridged ECE-pincer palladium(II) complexes: structures in the solid-state and in solution, and catalytic properties

C. A. Kruithof, A. Berger, H. P. Dijkstra, F. Soulimani, T. Visser, M. Lutz, A. L. Spek, R. J. M. K. Gebbink and G. van Koten, Dalton Trans., 2009, 3306 DOI: 10.1039/B816936E

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