Inorganic Chemistry, Vol.48, No.1, 16-18, 2009
Strong Coordination of Tetraphenylborate Anion to Copper(I) Bipyridine and Phenanthroline-Based Complexes and Its Effect on Catalytic Activity in the Cyclopropanation of Styrene
The synthesis, characterization, and cyclopropanation activity of tetrahedral copper(I) complexes with bipyridine- and phenanthroline-based ligands containing strongly coordinated tetraphenylborate anions are reported. Cu-I(bpy)(BPh4), Cu-I(phen)(BPh4), and Cu-I(3,4,7,8-Me(4)phen)(BPh4) complexes are the first examples in which the BPh4- counterion chelates a transition metal center in bidentate fashion through eta(2) pi interactions with two of its phenyl rings.