COORDINATION CHEMISTRY OF PHOSPHORYL COMPOUNDS .2. CATIONIC LANTHANIDE COMPLEXES OF HEXAMETHYL PHOSPHORAMIDE

The tripositive lanthanide ions have been found to form a series of cation complexes of the type [Ln(HMPA)6] (ClO4)3, where HMPA is the ligand O P[N(CH3)2]3. The ligand was found to be coordinated to all metals studied via its phosphoryl oxygen. The analytical, i.r. and solution conductivity data may be interpreted in terms of a coordination number of six for all cases studied. Similarities and differences in ligand properties and other rare earth ligands are discussed. © 1969.