Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 26, Issue 41, Pages 8867-8870Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202001865
Keywords
actinides; amidinates; coordination chemistry; neptunium; transuranium chemistry
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Funding
- German Federal Ministry of Education and Research (BMBF) [02NUK046B]
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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), N-3(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,4is the only reported tetravalent transuranic azide. All compounds were additionally characterized in solution usingpara-magnetic NMR spectroscopy showing an expectedC(3)-symmetry at low temperatures.
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