Bi- and trimetallic rare-earth–palladium complexes ligated by phosphinoamides

Abstract

The synthesis of the heterometallic early–late 4d/4f bi- and trinuclear phosphinoamido Ln–Pd(0) complexes [(Ph₂PNHPh)Pd{μ-(Ph₂PNPh)}₃Ln(μ-Cl)Li(THF)₃] (Ln = Y, Lu) and [Li(THF)₄][{(Ph₂PNHPh)Pd}₂{μ-(Ph₂PNPh)}₄Ln] (Ln = Y, Lu) is described. The latter compounds are the first early–late trimetallic phosphinoamido complexes. Although the metal atoms are forced into close proximity by the phosphinoamido ligands, quantum chemical calculations show only weak metal-to-metal interactions.