Nickel(II) complexes with bifunctional phosphine-imidazolium ligands and their catalytic activity in the Kumada-Corriu coupling reaction

作者：Wolf J; Labande A^*; Daran JC; Poli R

来源：Journal of Organometallic Chemistry, 2006, 691(3): 433-443.

DOI：10.1016/j.jorganchem.2005.09.010

• nickel(II)
• phosphine
• imidazolium
• bifunctional ligands
• Kumada-Corriu reaction

Zwitterionic Ni(II) complexes of type NiX3(NCN+), (NCN+ = 1-(2-diphenylphosphinoethyl)-3-(2,4,6-trimethylphenyl)imidazolium and X = Cl, 6; Br, 7), have been prepared by addition of NCN+ bromide (1a) or tetrafluoroborate (1b) to NiX2L, and characterised by X-ray crystallography. They have been used as catalytic precursors in the Kumada-Corriu coupling reaction between phenylmagnesium chloride and 4-chloroanisole, yielding high catalytic activities. Stoechiometric deprotonation investigations did not provide clear evidence for the formation of coordinated carbene species.

• 出版日期2006-1-15