Characterization of Uranyl Coordinated by Equatorial Oxygen: Oxo in UO3 versus Oxyl in UO3+
Journal Article
·
· Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
- Univ. de Nantes (France)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Duquesne Univ., Pittsburgh, PA (United States)
- Radboud Univ. Nijmegen (The Netherlands)
- Radboud Univ. Nijmegen (The Netherlands); Univ. of Amsterdam (Netherlands)
Uranium trioxide, UO3, has a T-shaped structure with bent uranyl, UO22+, coordinated by an equatorial oxo, O2–. The structure of cation UO3+ is similar but with an equatorial oxyl, O•–. Neutral and cationic uranium trioxide coordinated by nitrates were characterized by collision induced dissociation (CID), infrared multiple-photon dissociation (IRMPD) spectroscopy, and density functional theory. CID of uranyl nitrate, [UO2(NO3)3]– (complex A1), eliminates NO2 to produce nitrate-coordinated UO3+, [UO2(O•)(NO3)2]– (B1), which ejects NO3 to yield UO3 in [UO2(O)(NO3)]– (C1). Finally, C1 associates with H2O to afford uranyl hydroxide in [UO2(OH)2(NO3)]– (D1). IRMPD of B1, C1, and D1 confirms uranyl equatorially coordinated by nitrate(s) along with the following ligands: (B1) radical oxyl O•–; (C1) oxo O2–; and (D1) two hydroxyls, OH–. As the nitrates are bidentate, the equatorial coordination is six in A1, five in B1, four in D1, and three in C1. Ligand congestion in low-coordinate C1 suggests orbital-directed bonding. Hydrolysis of the equatorial oxo in C1 epitomizes the inverse trans influence in UO3, which is uranyl with inert axial oxos and a reactive equatorial oxo. The uranyl ν3 IR frequencies indicate the following donor ordering: O2–[best donor] >> O•– > OH– > NO3–.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1840948
- Journal Information:
- Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Journal Name: Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory Journal Issue: 25 Vol. 125; ISSN 1089-5639
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Uranyl/12-crown-4 Ether Complexes and Derivatives: Structural Characterization and Isomeric Differentiation
Role of the Uranyl Oxo Group as a Hydrogen Bond Acceptor
The gas-phase bis-uranyl nitrate complex [(UO2)(2)(NO3)(5)](-): infrared spectrum and structure
Journal Article
·
Mon Mar 19 20:00:00 EDT 2018
· Inorganic Chemistry
·
OSTI ID:1461137
Role of the Uranyl Oxo Group as a Hydrogen Bond Acceptor
Journal Article
·
Fri Dec 31 23:00:00 EST 2010
· Inorganic Chemistry
·
OSTI ID:1023834
The gas-phase bis-uranyl nitrate complex [(UO2)(2)(NO3)(5)](-): infrared spectrum and structure
Journal Article
·
Wed Nov 30 23:00:00 EST 2011
· International Journal of Mass Spectrometry
·
OSTI ID:1035216