164400-35-5Relevant academic research and scientific papers
(1,2-Bis(diphenylphosphino)ethane)(η3-1-arylallyl)palladium tetrafluoroborates. Distribution of the positive charge density by correlation of NMR chemical shifts with Hammett substituent constants
Malet, Ramón,Moreno-Ma?as, Marcial,Parella, Teodor,Pleixats, Roser
, p. 2463 - 2469 (2008/10/09)
13C NMR differences of chemical shifts (δX - δH) of allyl carbon atoms in a series of (1,2-bis(diphenylphosphino)ethane)(η 3-1-(4-X-phenyl)allyl)palladium tetrafluoroborates, X ranging from NO2 to OMe, correlate very well (r > 0.994) with σ Hammett constants. However, 31P NMR differences of the ligand cis and trans phosphorus atoms correlate well with σ and with σ+, respectively. These data indicate that the positive charge density of the cation is localized mainly in the P-Pd-P region.
