Tetraorganodichalcogenoimidodiphosphorus acids and their main group metal derivatives

The review is focused on the (XPR2)(YPR2' )NH acids (X, Y = O, S, Se; R, R ' = alkyl, aryl, OR) and their main group metal derivatives. The methods of preparation, spectroscopic studies and molecular structures of known imidodiphosphorus acids and related derivatives as well as those of inorganic and organometallic main group metal complexes containing either protonated or deprotonated imidodiphosphorus ligand moieties are systematized and discussed. (C) 2001 Elsevier Science B.V. All rights reserved.