1152096-77-9Relevant academic research and scientific papers
Donor and ate-coordination in rare-earth metal bis(dimethylsilyl)amide complexes
Meermann, Christian,Gerstberger, Gisela,Spiegler, Michael,Toernroos, Karl W.,Anwander, Reiner
, p. 2014 - 2023 (2009/03/11)
Complete thf donor exchange is observed when complexes Ln[N(SiHMe 2)2]2(thf)2 (Ln = La, Nd) are treated with the monofunctional donor molecules triphenylphosphane oxide, N-methylimidazole, and 1,3-dimethylimidazolin-2-ylidene. The resulting complexes Ln[N(SiHMe2)2]3(donor)2 exhibit a trigonal-bipyramidal coordination geometry with the donor molecules located in the apical positions. Bifunctional chelating donors 1,10-phenanthroline, 1,2-bis(dimethylphosphanyl) ethane, and N,N,N′,N′- tetramethylethylenediamine give discrete complexes Ln[N(SiHMe2) 2]3(phen) (Ln = Sc, La, Nd), Nd[N(SiHMe2) 2]3(dmpe), and La[N(SiHMe2)2] 3(tmeda). The phen adducts are isostructural as demonstrated for the large Nd3+ and small Sc3+ centers by X-ray structure analyses and display a distorted square-pyramidal coordination geometry in the solid state. The distinct coordination of various donor molecules implies subtle changes of the Si-H bonding which can be straightforwardly examined by NMR and FTIR spectroscopy. Ate complex {Y[N(SiHMe2)2] 4Li}2 can be isolated and crystallized from Y(OTf) 3-Li[N(SiHMe2)2]-hexane reaction mixtures. Dimerization is accomplished by unusual intermolecular Li...H-Si interactions. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
