2
|
Bradley JA, Yang P, Batista ER, Boland KS, Burns CJ, Clark DL, Conradson SD, Kozimor SA, Martin RL, Seidler GT, Scott BL, Shuh DK, Tyliszczak T, Wilkerson MP, Wolfsberg LE. Experimental and Theoretical Comparison of the O K-Edge Nonresonant Inelastic X-ray Scattering and X-ray Absorption Spectra of NaReO4. J Am Chem Soc 2010; 132:13914-21. [DOI: 10.1021/ja1040978] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Joseph A. Bradley
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Ping Yang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Enrique R. Batista
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Kevin S. Boland
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Carol J. Burns
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - David L. Clark
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Steven D. Conradson
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Stosh A. Kozimor
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Richard L. Martin
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Gerald T. Seidler
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Brian L. Scott
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - David K. Shuh
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Tolek Tyliszczak
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Marianne P. Wilkerson
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Laura E. Wolfsberg
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Physics, University of Washington, Seattle, Washington 98195, Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and W.R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| |
Collapse
|
3
|
Kozimor SA, Yang P, Batista ER, Boland KS, Burns CJ, Clark DL, Conradson SD, Martin RL, Wilkerson MP, Wolfsberg LE. Trends in covalency for d- and f-element metallocene dichlorides identified using chlorine K-edge X-ray absorption spectroscopy and time-dependent density functional theory. J Am Chem Soc 2009; 131:12125-36. [PMID: 19705913 DOI: 10.1021/ja9015759] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe the use of Cl K-edge X-ray absorption spectroscopy (XAS) and both ground-state and time-dependent hybrid density functional theory (DFT) to probe the electronic structure and determine the degree of orbital mixing in M-Cl bonds for (C(5)Me(5))(2)MCl(2) (M = Ti, 1; Zr, 2; Hf, 3; Th, 4; U, 5), where we can directly compare a class of structurally similar compounds for d- and f-elements. Pre-edge features in the Cl K-edge XAS data for the group IV transition-metals 1-3 provide direct evidence of covalent M-Cl orbital mixing. The amount of Cl 3p character was experimentally determined to be 25%, 23%, and 22% per M-Cl bond for 1-3, respectively. For actinides, we find a pre-edge shoulder for 4 (Th) and distinct and weak pre-edge features for U, 5. The amount of Cl 3p character was determined to be 9% for 5, and we were unable to make an experimental determination for 4. Using hybrid DFT calculations with relativistic effective core potentials, the electronic structures of 1-5 were calculated and used as a guide to interpret the experimental Cl K-edge XAS data. For transition-metal compounds 1-3, the pre-edge features arise due to transitions from Cl 1s electrons into the 3d-, 4d-, and 5d-orbitals, with assignments provided in the text. For Th, 4, we find that 5f- and 6d-orbitals are nearly degenerate and give rise to a single pre-edge shoulder in the XAS. For U, 5, we find the 5f- and 6d-orbitals fall into two distinct energy groupings, and Cl K-edge XAS data are interpreted in terms of Cl 1s transitions into both 5f- and 6d-orbitals. Time-dependent DFT was used to calculate the energies and intensities of Cl 1s transitions into empty metal-based orbitals containing Cl 3p character and provide simulated Cl K-edge XAS spectra for 1-4. For 5, which has two unpaired 5f electrons, simulated spectra were obtained from transition dipole calculations using ground-state Kohn-Sham orbitals. To the best of our knowledge, this represents the first application of Cl K-edge XAS to actinide systems. Overall, this study allows trends in orbital mixing within a well-characterized structural motif to be identified and compared between transition-metals and actinide elements. These results show that the orbital mixing for the d-block compounds slightly decreases in covalency with increasing principal quantum number, in the order Ti > Zr approximately = Hf, and that uranium displays approximately half the covalent orbital mixing of transition elements.
Collapse
Affiliation(s)
- Stosh A Kozimor
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
4
|
Knobloch DJ, Benito-Garagorri D, Bernskoetter WH, Keresztes I, Lobkovsky E, Toomey H, Chirik PJ. Addition of Methyl Triflate to a Hafnocene Dinitrogen Complex: Stepwise N2 Methylation and Conversion to a Hafnocene Hydrazonato Compound. J Am Chem Soc 2009; 131:14903-12. [DOI: 10.1021/ja904436a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Donald J. Knobloch
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853
| | - David Benito-Garagorri
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853
| | - Wesley H. Bernskoetter
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853
| | - Ivan Keresztes
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853
| | - Emil Lobkovsky
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853
| | - Hannah Toomey
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853
| | - Paul J. Chirik
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853
| |
Collapse
|
5
|
Kozimor SA, Yang P, Batista ER, Boland KS, Burns CJ, Christensen CN, Clark DL, Conradson SD, Hay PJ, Lezama JS, Martin RL, Schwarz DE, Wilkerson MP, Wolfsberg LE. Covalency Trends in Group IV Metallocene Dichlorides. Chlorine K-Edge X-Ray Absorption Spectroscopy and Time Dependent-Density Functional Theory. Inorg Chem 2008; 47:5365-71. [DOI: 10.1021/ic8004932] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ping Yang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | | | - Kevin S. Boland
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Carol J. Burns
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | | | - David L. Clark
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | | | - P. Jeffrey Hay
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Juan S. Lezama
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | | | | | | | | |
Collapse
|