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Enantiomerically Pure Tetravalent Neptunium Amidinates: Synthesis and Characterization
Author(s) -
Fichter Sebastian,
Kaufmann Sebastian,
Kaden Peter,
Brunner Tobias S.,
Stumpf Thorsten,
Roesky Peter W.,
März Juliane
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202001865
Subject(s) - enantiopure drug , neptunium , reactivity (psychology) , chemistry , chirality (physics) , azide , nuclear magnetic resonance spectroscopy , halide , metal , actinide , lanthanide , characterization (materials science) , oxidation state , crystallography , inorganic chemistry , stereochemistry , organic chemistry , enantioselective synthesis , materials science , catalysis , nanotechnology , symmetry breaking , chiral symmetry breaking , alternative medicine , pathology , quantum mechanics , nambu–jona lasinio model , medicine , physics , ion
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, 4 is the only reported tetravalent transuranic azide. All compounds were additionally characterized in solution using para ‐magnetic NMR spectroscopy showing an expected C 3 ‐symmetry at low temperatures.