Use of a highly hindered phosphino-alkoxide ligand in the formation of monomeric homoleptic lanthanoid metal complexes: X-ray structures of [Ln(OCBut2CH2PMe2)3](Ln = Y or Nd)

Abstract

Complexes [[graphic omitted]Me₂)₃][Ln = Y (1) or Nd (2)] are crystalline and hydrocarbon-soluble; they are the first examples of monomeric, homoleptic Group 3 or lanthanoid metal alkoxides and also the first crystallographically authenticated Group 3 or early (f⁰–f³) lanthanoid metal tertiary phosphine complexes [¹J(³¹P–⁸⁹Y)= 59 Hz], with the following geometric parameters for (1)[or (2) in square brackets]: <Ln–O> 2.090(4)[2.174(2)], <Ln–P> 3.045(2)[3.154(2)]Å, and <O–Ln–O'> 110.5(2)[114.5(1)]°.