Rare-earth metal hydroxylamide complexes

Abstract

The rare-earth metal hydroxylamide compound Y[N(SiHMe₂)₂]₂[ONBn₂][THF] (1) was prepared by the silylamide elimination pathway from the reaction of N,N-dibenzylhydroxylamine, Bn₂NOH (Bn = CH₂C₆H₅), with Y[N(SiHMe₂)₂]₃[THF]₂ and was characterised by multinuclear NMR spectroscopy and elemental analysis. The compounds [Cp₂Y(ONBn₂)]₂ (2a) [Cp₂Sm(ONBn₂)]₂ (2b) were obtained by the reactions of MCp₃ (M = Y, Sm) with Bn₂NOH. The trinuclear compound Cp₅Y₃[ON(Me)CH₂CH₂(Me)NO]₂ (3) was obtained by the reaction of YCp₃ and the bishydroxylamine HON(Me)CH₂CH₂(Me)NOH. 2a, 2b and 3 were characterised by NMR spectroscopy, single-crystal X-ray diffraction and elemental analysis. In all these complexes side-on-coordination of the hydroxylamide units was observed. The compounds are of dynamic nature in solution.