Jj. Brunet et al., NOVEL CATIONIC CHIRAL PHOSPHORUS LIGANDS AND THEIR ZWITTERIONIC HYDRIDOCARBONYLFERRATE COMPLEXES, Organometallics, 15(7), 1996, pp. 1752-1754
The reaction of (-)-N,N-dimethylephedrinium salts with R(2)PNMe(2) der
ivatives allows the high-yield synthesis of new chiral phosphorus liga
nds with an ammonium side chain, termed ''ephosiums''. Diphenyl-N,N-di
methylephosium hexaflurophosphate reacts with KHFe(CO)(4) to afford th
e chiral zwitterionic complex diphenyl-N,N-dimethylephosium hydridotri
carbonylferrate, characterized by X-ray diffraction and NMR studies.