The Homoleptic U(NCSe)84- Anion in (Pr4N)4U(NCSe)8.2CFCl3 and Th(NCSe)4(OP(NMe2)3)4.0.5CH3CN.0.5H2O: First Structurally Characterized Actinide Isoselenocyanates

Margaret-Jane Crawford (1) , Konstantin Karaghiosoff (2) , Peter Mayer (2)

1 Department of Chemistry
2 Department of Chemistry

The neutral thorium complex Th(NCSe)4(OP(NMe2)3)4 and homoleptic octa(isoselenocyanato)uranate anion U(NCSe)84- in (Pr4N)4U(NCSe)8.2CFCl3 were synthesized and structurally characterized. (Pr4N)4U(NCSe)8.2CFCl3 containing the U(IV) anion U(NCSe)84- was characterized using IR spectroscopy and single crystal X-ray diffraction and Th(NCSe)4(OP(N(CH3)2)3)4.0.5CH3CN.0.5H2O was characterized using IR and Raman spectroscopy, as well as 31P{1H}, 15N{1H}, 14N{1H}, 13C{1H}, 1H and 77Se NMR spectroscopy and structurally characterized using single crystal X-ray diffraction.The U(NCSe)84- anion and Th(NCSe)4(OP(N(CH3)2)3)4.0.5CH3CN0.5H2O complex are the first structurally characterized actinide-isoselenocyanates. The crystal structures show approximate square antiprism arrangement of the ligands around the actinide(IV) centres.

Mots clés: Physical Sciences

Margaret-Jane Crawford, Konstantin Karaghiosoff, Peter Mayer. The Homoleptic U(NCSe)84- Anion in (Pr4N)4U(NCSe)8.2CFCl3 and Th(NCSe)4(OP(NMe2)3)4.0.5CH3CN.0.5H2O: First Structurally Characterized Actinide Isoselenocyanates. Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie, 2010, 636 (11), pp.1903. ⟨10.1002/zaac.201000114⟩. ⟨hal-00556043⟩