Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 829, Issue -, Pages 79-84Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2016.10.034
Keywords
Uranium; Pentamethylcyclopentadienyl; Metallacyclocumulene; Electronic spectroscopy; X-ray crystallography
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Funding
- U.S. National Science Foundation [CHE-1265608, CHE-1565658]
- DOE [DE-AC05-060R23100]
- U.S. Department of Energy [DE-AC52-06NA25396]
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A new uranium metallacyclocumulene, (C5Me5)(2)U(eta(4)-1,2,3,4-PhC4Ph), was synthesized by both reaction of (C5Me5)(2)UCl2 with 1,4-diphenylbutadiyne in the presence of KC8 and by ligand exchange between (C5Me5)(2)U(eta(2)-Me3SiC2SiMe3) and 1,4-diphenylbutadiyne. Full characterization of (C5Me5)(2)U(eta(4)-1,2,3,4-PhC4Ph) is reported, including the solid-state structure. (C5Me5)(2)U(eta(4)-1,2,3,4-PhC4Ph) displays an unusually detailed UV visible spectrum, which is rare for uranium(IV) metallocene complexes. (C) 2016 Elsevier B.V. All rights reserved.
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