A5038264654- Radioactive element chemistry and processing
- Organometallic Complex Synthesis and Catalysis
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Coordination Chemistry and Organometallics
- Synthesis and characterization of novel inorganic/organometallic compounds
- Crystallography and molecular interactions
- Nuclear Materials and Properties
- Nuclear and radioactivity studies
- Radioactive contamination and transfer
- Inorganic Chemistry and Materials
- Lanthanide and Transition Metal Complexes
- Inorganic Fluorides and Related Compounds
- Magnetism in coordination complexes
- Nuclear Issues and Defense
- Nuclear materials and radiation effects
- Polyoxometalates: Synthesis and Applications
- Metal complexes synthesis and properties
- History and advancements in chemistry
- Radiopharmaceutical Chemistry and Applications
- Chemical Synthesis and Characterization
- Inorganic and Organometallic Chemistry
- Crystal Structures and Properties
- Advanced Chemical Physics Studies
- Rare-earth and actinide compounds
Pacific Northwest National Laboratory
2000-2024
Los Alamos National Laboratory
2008-2020
Los Alamos Medical Center
1992-2018
Lawrence Berkeley National Laboratory
1986-2017
University of California, Berkeley
1986-2017
Dow Chemical (United States)
2010
Environmental Molecular Sciences Laboratory
2009-2010
Lomonosov Moscow State University
2005
Swinburne University of Technology
2005
NS Kurnakova Institute of General and Inorganic Chemistry
2005
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Properties of High-Valent Organouranium Complexes Containing Terminal Organoimido Oxo Functional Groups. A New Class Organo-f-Element ComplexesDavid S. J. Arney Carol BurnsCite this: Am. Chem. Soc. 1995, 117, 37, 9448–9460Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September...
We describe the use of Cl K-edge X-ray absorption spectroscopy (XAS) and both ground-state time-dependent hybrid density functional theory (DFT) to probe electronic structure determine degree orbital mixing in M−Cl bonds for (C5Me5)2MCl2 (M = Ti, 1; Zr, 2; Hf, 3; Th, 4; U, 5), where we can directly compare a class structurally similar compounds d- f-elements. Pre-edge features XAS data group IV transition-metals 1−3 provide direct evidence covalent mixing. The amount 3p character was...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structure of high-valent organouranium complexes containing terminal monooxo functional groupsDavid S. J. Arney Carol BurnsCite this: Am. Chem. Soc. 1993, 115, 21, 9840–9841Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published inissue 1 October 1993https://pubs.acs.org/doi/10.1021/ja00074a077https://doi.org/10.1021/ja00074a077research-articleACS PublicationsRequest reuse permissionsArticle...
In clean, one-pot procedures, the uranium complex 1 reductively cleaves azides and azo compounds to generate bis(imido) derivatives [Eq. (a)]. This unusual reaction has not been observed previously in either actinide series or with a metallocene complex.
Migratory insertion of benzonitrile into both An−C bonds the bis(alkyl) and bis(aryl) complexes (C5Me5)2AnR2 yields actinide ketimido (C5Me5)2An[−NC(Ph)(R)]2 (where An = Th, R Ph, CH2Ph, CH3; U, CH3) provides a versatile method for construction electronically sterically diverse ketimide ligands. The Th(IV) compounds represent first examples thorium complexes. uranium are surprisingly unreactive, bis(ketimido) display unusual electronic structure properties. combined chemical physical...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structure of the first uranium(VI) organometallic complexDavid S. J. Arney, Carol Burns, David C. SmithCite this: Am. Chem. Soc. 1992, 114, 25, 10068–10069Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.acs.org/doi/10.1021/ja00051a053https://doi.org/10.1021/ja00051a053research-articleACS PublicationsRequest reuse permissionsArticle...
Migratory insertion of diphenyldiazomethane into both metal-carbon bonds the bis(alkyl) and bis(aryl) complexes (C(5)Me(5))(2)AnR(2) yields first f-element bis(hydrazonato) (C(5)Me(5))(2)An[eta(2)-(N,N')-R-N-N=CPh(2)](2) [An = Th, R CH(3) (18), PhCH(2) (15), Ph (16); An U, (17), (14)], which have been characterized by a combination spectroscopy, electrochemistry, X-ray crystallography. The two hydrazonato ligands adopt an eta(2)-coordination mode leading to 20-electron (for Th) 22-electron...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron-transfer reactions of divalent ytterbium metallocenes. Synthesis the series [(Me5C5)2Yb]2[.mu.-E] (E = oxygen, sulfur, selenium, or tellurium) and crystal structure [(Me5C5)2Yb]2[.mu.-Se]David J. Berg, Carol Burns, Richard A. Andersen, Allan ZalkinCite this: Organometallics 1989, 8, 1865–1870Publication Date (Print):August 1, 1989Publication History Published online1 May 2002Published inissue 1 August...
Known for the Group 6 metals over 100 years, family of isopolyoxometalates has now been extended to include first uranium derivative 1, which contains a [U6O13] core. In comparison well-studied transition metal analogues, structural and electronic properties 1 reflect chemical attributes actinides. Cp≠=1,2,4-tBu3C5H2. Supporting information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2001/z16983_s.pdf or from author. Please note: The publisher not...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNeutron structure and inelastic-neutron-scattering theoretical studies of molybdenum complex Mo(CO)(H2)[(C6D5)2PC2H4P(C6D5)2]2.cntdot.4.5C6D6, a with an extremely low barrier to hydrogen rotation. Implications on the reaction coordinate for H-H cleavage dihydrideGregory J. Kubas, Carol Burns, Juergen Eckert, Susanna W. Johnson, Allen C. Larson, Phillip Vergamini, Clifford Unkefer, G. R. K. Khalsa, Sarah A. Jackson, Odile EisensteinCite this: Am....
Reaction of UO2Cl2·x(H2O) (x = 1, 3) with 6 equiv ClSiMe3 in THF provides yellow UO2Cl2(THF)3. The single-crystal X-ray structure the complex reveals a monomer which U is coordinated pseudopentagonal bipyramidal fashion by two apical oxo groups, three equatorial ligands, and Cl groups. Upon drying compound, dimeric [UO2Cl2(THF)2]2 isolated. This compound suitable anhydrous starting material for variety uranyl coordination compounds.
A high-yield one-pot synthesis of (C5Me5)U(CH2C6H5)3 has been developed and applied to the a new organouranium complex possessing (pentamethylcyclopentadienyl)bis(cyclopentadienyl) ligand framework, (C5Me5)(C5H5)2U(CH2C6H5). Both complexes have structurally characterized. We also report herein an improved safer for popular uranium starting material UCl4.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of the First Examples Transition Metal .eta.2-SiH4 Complexes, cis-Mo(.eta.2-SiH4)(CO)(R2PC2H4PR2)2, and Evidence for an Unprecedented Tautomeric Equilibrium between Complex a Hydridosilyl Species: A Model Methane Coordination ActivationXiao-Liang Luo, Gregory J. Kubas, Carol Burns, Jeffrey C. Bryan, Clifford UnkeferCite this: Am. Chem. Soc. 1995, 117, 3, 1159–1160Publication Date (Print):January 1, 1995Publication History Published...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPreparation of Actinide Phosphinidene Complexes: Steric Control ReactivityDavid S. J. Arney, R. Chris Schnabel, Brian C. Scott, and Carol BurnsView Author Information Chemical Science Technology Division Los Alamos National Laboratory Alamos, New Mexico 87545 Cite this: Am. Chem. Soc. 1996, 118, 28, 6780–6781Publication Date (Web):July 17, 1996Publication History Received23 January 1996Published online17 July inissue 1...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUranium alkoxide chemistry. 1. Synthesis and the novel dimeric structure of first homoleptic uranium(III) aryloxide complexW. G. Van der Sluys, C. J. Burns, Huffman, A. P. SattelbergerCite this: Am. Chem. Soc. 1988, 110, 17, 5924–5925Publication Date (Print):August 1, 1988Publication History Published online1 May 2002Published inissue 1 August 1988https://doi.org/10.1021/ja00225a067RIGHTS & PERMISSIONSArticle Views668Altmetric-Citations88LEARN...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFirst example of a neutral homoleptic uranium alkyl. Synthesis, properties, and structure U[CH(SiMe3)2]3William G. Van der Sluys, Carol J. Burns, Alfred P. SattelbergerCite this: Organometallics 1989, 8, 3, 855–857Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989https://pubs.acs.org/doi/10.1021/om00105a051https://doi.org/10.1021/om00105a051research-articleACS PublicationsRequest reuse...
The synthesis and structural characterization of a rare example uranyl complex possessing three equatorial ligands, [M(THF)2][UO2(N(SiMe3)2)3] (3a, M = Na; 3b, K), are described. sodium salt 3a is prepared by protonolysis [Na(THF)2]2[UO2(N(SiMe3)2)4], whereas the potassium 3b obtained via metathesis reaction chloride UO2Cl2(THF)2 (4) with 3 equiv K[N(SiMe3)2]. A single-crystal X-ray diffraction study revealed trigonal-bipyramidal geometry about uranium, formed two axial oxo amido average U=O...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUranium(VI) organoimido complexesCarol J. Burns, Wayne H. Smith, John C. Huffman, and Alfred P. SattelbergerCite this: Am. Chem. Soc. 1990, 112, 8, 3237–3239Publication Date (Print):April 1, 1990Publication History Published online1 May 2002Published inissue 1 April 1990https://pubs.acs.org/doi/10.1021/ja00164a069https://doi.org/10.1021/ja00164a069research-articleACS PublicationsRequest reuse permissionsArticle Views620Altmetric-Citations92LEARN...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of the first n2-olefin complex a 4f-transition metal, (Me5C5)2Yb(.mu.-C2H4)Pt(PPh3)2Carol J. Burns and Richard A. AndersenCite this: Am. Chem. Soc. 1987, 109, 3, 915–917Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inissue 1 February 1987https://pubs.acs.org/doi/10.1021/ja00237a056https://doi.org/10.1021/ja00237a056research-articleACS PublicationsRequest reuse permissionsArticle...
Abstract The bonding of organo-f-element complexes is examined both by review theoretical considerations and examination experimental methods to determine the extent covalency. While ligand—metal orbital overlap important in rigorous descriptions electronic structure (and therefore many spectroscopic studies), only a few cases do covalent contributions significantly perturb chemical behavior compounds.
Uranium(VI) alkoxide complexes are prepared via metathesis reactions of [UO2Cl2(THF)2]2 with potassium alkoxides in nonaqueous media. The dark red compound U[OCH2C(CH3)3]6, 1, results from redistributive exchange oxo and neopentoxide ligands between more than one uranium species. Single-crystal X-ray diffraction analysis 1 reveals a monomer which the is coordinated pseudooctahedral fashion by six ligands. Imposition steric congestion at metal center prevents oxo-alkoxide ligand using...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation Chemistry of a Uranium(III) AryloxideLarry R. Avens, David M. Barnhart, Carol J. Burns, Steven D. McKee, and Wayne H. SmithCite this: Inorg. Chem. 1994, 33, 19, 4245–4254Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue 1 September 1994https://pubs.acs.org/doi/10.1021/ic00097a010https://doi.org/10.1021/ic00097a010research-articleACS PublicationsRequest reuse permissionsArticle...