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Neptunium Alkoxide Chemistry: Expanding Alkoxides to the Transuranium Elements
Dennis Grödler1, Joseph M Sperling2, Brian M Rotermund2
1Department of Chemistry, Institute for Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany.
Abstract:
Two oxo-containing neptunium(IV) tert-butoxides, [Np3O(OBu)10] (1) and [K4Np2O(OBu)10] (2), were synthesized using the ligand substitution between neptunium(IV) silylamides and HOBu, whereas the salt metathesis between [NpCl4(DME)2] (DME = dimethoxyethane) and various amounts of LiOBu resulted in the formation of oxo-free alkoxides [Np(OBu)4(py)2] (3; py = pyridine) and [Li(THF)]2[Np(OBu)6] (4; THF = tetrahydrofuran). These complexes are the first structurally characterized neptunium(IV) alkoxides using single-crystal X-ray diffraction and solid-state absorption spectroscopy, which provide data for the development of anhydrous metal-organic neptunium chemistry.
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