Enantiomerically Pure Tetravalent Neptunium Amidinates: Synthesis and Characterization |
| |
| Authors: | Sebastian Fichter Sebastian Kaufmann Dr. Peter Kaden Dr. Tobias S. Brunner Prof. Dr. Thorsten Stumpf Prof. Dr. Peter W. Roesky Dr. Juliane März |
| |
| Affiliation: | 1. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany;2. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstraße 15, 76131 Karlsruhe, Germany |
| |
| Abstract: | The synthesis of a tetravalent neptunium amidinate [NpCl((S)-PEBA)3] ( 1 ) ((S)-PEBA=(S,S)-N,N′-bis-(1-phenylethyl)-benzamidinate) is reported. This complex represents the first structurally characterized enantiopure transuranic compound. Reactivity studies with halide/pseudohalides yielding [NpX((S)-PEBA)3] (X=F ( 2 ), Br ( 3 ), N3 ( 4 )) have shown that the chirality-at-metal is preserved for all compounds in the solid state. Furthermore, they represent an unprecedented example of a structurally characterized metal–organic Np complex featuring a Np−Br ( 3 ) bond. In addition, 4 is the only reported tetravalent transuranic azide. All compounds were additionally characterized in solution using para-magnetic NMR spectroscopy showing an expected C3-symmetry at low temperatures. |
| |
| Keywords: | actinides amidinates coordination chemistry neptunium transuranium chemistry |
|
|
