Sulfato-bridged ECE-pincer palladium(II) complexes: structures in the solid-state and in solution, and catalytic properties.
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.
Chemical Biology & Organic Chemistry, Debye Institute for NanoMaterials Science, Faculty of Science, Utrecht University, Padualaan 8, 3584, CH, Utrecht, The Netherlands.
Cornelis A
CA
Kruithof
Alexsandro
A
Berger
Harmen P
HP
Dijkstra
Fouad
F
Soulimani
Tom
T
Visser
Martin
M
Lutz
Anthony L
AL
Spek
Robertus J M Klein
RJ
Gebbink
Gerard
G
van Koten
D002384:Catalysis; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*; D012996:Solutions; D013059:Spectrum Analysis, Raman; D013431:Sulfates / Q000737:chemistry*
D012996:Solutions; D013431:Sulfates; D010165:Palladium