(1,2-Bis(diphenylphosphino)ethane)(.eta.3-1-arylallyl)palladium Tetrafluoroborates. Distribution of the Positive Charge Density by Correlation of NMR Chemical Shifts with Hammett Substituent Constants

(1,2-Bis(diphenylphosphino)ethane)(.eta.3-1-arylallyl)palladium Tetrafluoroborates. Distribution of the Positive Charge Density by Correlation of NMR Chemical Shifts with Hammett Substituent Constants