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Updated: Jun 23, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Sulfato-bridged ECE-pincer palladium(II) complexes: structures in the solid-state and in solution, and catalytic
Cornelis A Kruithof1, Alexsandro Berger, Harmen P Dijkstra
1Chemical Biology & Organic Chemistry, Debye Institute for NanoMaterials Science, Faculty of Science, Utrecht University, Padualaan 8, 3584, CH, Utrecht, The Netherlands.
Abstract:
ECE-pincer sulfato palladium complexes (pincer = [C(6)H(3)(CH(2)E)(2)-2,6](-); E = SPh (), SMe (), S(t)Bu (), NMe(2) ()) were synthesized and characterized. In the solid-state (X-ray determinations) and exist as neutral ECE-pincer palladium sulfato complexes with a mu(2)-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 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.
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