Tris(Cyclopentadienyl)Uranium-t-Butyl: Synthesis, reactions, and mechanisms

Thesis/Dissertation · Thu Apr 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10159968· OSTI ID:10159968

Weydert, Marc ^[1]

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1. Univ. of California, Berkeley, CA (United States)

Compounds (RC₅H₄)₃U(t-Bu) were prepared for R = H, Me, Et. Their decomposition products in aromatic solvents are consistent with a radical decomposition pathway induced by solvent-assisted U-C bond homolysis. NMR was used to study the reactions of (RC₅H₄)₃UCl with t-BuLi (R = t-Bu, Me₃Si). Reactions of (MeC₅H₄)₃U(t-Bu) with Lewis bases and fluorocarbons were studied. Analogous reaction chemistry between (RC₅H₄)₃ThX systems and t-BuLi was also studied, and reactivity differences between U and Th are discussed. Synthesis of sterically crowded (RC₅H₄)₄U compounds is next considered. Reaction of the trivalent (RC₅H₄)₃U with (RC₅H₄)₂Hg results in formation of (RC₅H₄)₄U. Steric congestion, cyclopentadienyl ligand exchange, and electron transfer are discussed. (DLC)

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10159968
• Report Number(s): LBL--34031; ON: DE93015036
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201
400702
AROMATICS
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL REACTION KINETICS
CYCLOPENTADIENE
DECOMPOSITION
ELECTRON TRANSFER
LEWIS BASES
NUCLEAR MAGNETIC RESONANCE
ORGANIC FLUORINE COMPOUNDS
ORGANIC SOLVENTS
ORGANOMETALLIC COMPOUNDS
PROPERTIES OF RADIOACTIVE MATERIALS
STEREOCHEMISTRY
SYNTHESIS
THORIUM COMPLEXES
URANIUM COMPLEXES