Molecular octa-uranium rings with alternating nitride and azide bridges |
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Authors: | Evans William J Kozimor Stosh A Ziller Joseph W |
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Institution: | Department of Chemistry, University of California, Irvine, CA 92697-2025, USA. wevans@uci.edu |
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Abstract: | Uranium nitrides offer potential as future nuclear fuels and as probes of metal ligand multiple bonding involving the f-block actinide metals. However, few molecular examples are available for study owing to the difficulties in synthesis. Recent advances in organoactinide chemistry have provided a route to uranium nitride complexes that expands the options for developing UN chemistry. Several 24-membered uranium nitrogen rings, (UNUN3)4, have been synthesized by reduction of sodium azide with organometallic metallocene derivatives, (C5Me4R)2U](mu-Ph)2BPh2] (R = Me, H; Me = methyl, Ph = phenyl). The nanometer-sized rings contain unusual UNU nitride linkages that have short U-N distances within the double-bond range. |
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