Synthesis and crystal structure of bis(cyclopentadienyl)amido complex of neodymium, [Li(DME) 3][(η 5-C 5H 5) 2Nd(NPh 2) 2

Abstract

[Li(DME) 3] [(η 5-C 5H 5) 2Nd(NPh 2) 2] ( 1) was synthesized by the reaction of NdCl 3 · 2LiCl · nTHF, 2 equivalents of CpNa (Cp = C 5H 5) and 2 equivalents of LiNPh 2 and recrystallized from DME. Complex 1 was characterized by elemental analysis, IR and NMR spectroscopy and X-ray structural analysis. The crystal structure of 1 shows it to consists of [Li(DME) 3] + and [(η 5-C 5H 5) 2Nd(NPh 2) 2] − ion pairs. The neodymium atom was coordinated by two η 5-bonded cyclopentadienyls and two σ-bonded diphenylamido ligands in a distorted tetrahedral arrangement, with the average distances NdCp(1) = 2.783(8), NdCp(2) = 2.767(9) (Cp indicates the ring carbons) and NdN = 2.428(7)Å.