Organophosphorés et accepteurs d’électrons

Abstract

A comparison of the properties of adducts which result from the reaction of neutral donors (like ethers, amines, sulfides or phosphines) with cationic acceptors may provide general informations upon the nature of bonding between first and second row elements. For example, with carbonium compounds, trivalent phosphorus derivatives gave adducts the stability of which strongly depends on the nature of the cation as well as of the phosphorus ligands. In addition, the importance of the nature of the anion is reflected by the variation of the proton chemical shifts in the NMR spectra of a series of tropylium-triphenylphosphine salts.