Tris(tetraphenylimidodiphosphinato)praseodymium: a powerful tool for the analysis of fatty acids by 1H n.m.r. spectroscopy

Abstract

The shifts induced by tris(tetraphenylimidodiphosphinato)praseodymium in the ¹H n.m.r. spectra of fatty acids have led us to resolve completely the signals of lauric acid, analyse a mixture of four saturated fatty acids, and characterize unsaturated acids, e.g. arachidonic acid, by determining the position and the configuration of the double bonds, and the preferred conformation of the backbone.