121340-54-3Relevant articles and documents
Synthesis, characterization, and the role of counterion in cyclopropanation of styrene catalyzed by [CuI(2,2′-bpy)(π-CH2{double bond, long}CHC6H5)][A] (A = ClO4-, PF6- and CF3 SO3-) complexes
Ricardo, Carolynne,Pintauer, Tomislav
, p. 5165 - 5172 (2007)
Copper(I)/2,2′-bipyridine complexes, [CuI(bpy)(π-CH2CHC6H5)][A] (A = CF3 SO3- (1), PF6- (2)) have been synthesized and characterized. The equilibrium constants for the coordination of styrene to [CuI(bpy)]+ cations at 300 K were determined to be 4.3 × 103 (1), 4.4 × 103 (2) and 3.8 × 103 M-1(A = ClO4-, 3) . These data suggested that the axial coordination of the counterion in these complexes observed in the solid state (2.4297(11) A? 1, 2.9846(12) A? 2, and 2.591(4) A? 3) did not significantly affect the binding constant of styrene to [CuI(bpy)]+ cations in solution. In cyclopropanation reactions catalyzed by 1-3, similar product distribution was obtained. The rate of decomposition of EDA in the presence of styrene at room temperature catalyzed by 3 (kobs = (7.7 ± 0.32) × 10-3 min-1) was slower than the rate observed for 1 (kobs = (1.4 ± 0.041) × 10-2 min-1) or 2 (kobs = (1.0 ± 0.025) × 10-2 min-1).
