Abstract
AbstractThe 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 (1) were synthesised and structurally characterised. (Pr4N)4U(NCSe)8·2CFCl3 contains the UIV anion U(NCSe)84– and was characterised using IR spectroscopy and single‐crystal X‐ray diffraction. Th(NCSe)4(OP(N(CH3)2)3)4·0.5CH3CN·0.5H2O (2) was characterised using IR and Raman spectroscopy, as well as 31P{1H}, 15N{1H}, 14N{1H}, 13C{1H}, 1H and 77Se NMR spectroscopy and structurally characterised 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 characterised actinide‐isoselenocyanates. The crystal structures shows an approximate square antiprismatic arrangement of the ligands around the actinide(IV) atoms.
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