Lanthanide tetraphenylimidodiphosphinates: X-ray structure of an ethyl acetate adduct and use as n.m.r. shift reagents for acids

Abstract

Lanthanum tris(tetraphenylimidodiphosphinate){La(tpip)3} reacts with ethyl acetate to give a stable 1 : 1 adduct, the X-ray structure of which has been established; complexes of the general structure Ln(tpip)3 can be used successfully as n.m.r. shift reagents in association with acids and phenols.