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Atkins AJ, Bauer M, Jacob CR. High-resolution X-ray absorption spectroscopy of iron carbonyl complexes. Phys Chem Chem Phys 2015; 17:13937-48. [DOI: 10.1039/c5cp01045d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We apply high-energy-resolution fluorescence-detected (HERFD) X-ray absorption near-edge structure (XANES) spectroscopy to study iron carbonyl complexes.
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Affiliation(s)
- Andrew J. Atkins
- Karlsruhe Institute of Technology (KIT)
- Center for Functional Nanostructures and Institute of Physical Chemistry
- 76131 Karlsruhe
- Germany
| | - Matthias Bauer
- Universität Paderborn
- Naturwissenschaftliche Fakultät
- Department Chemie
- 33098 Paderborn
- Germany
| | - Christoph R. Jacob
- Karlsruhe Institute of Technology (KIT)
- Center for Functional Nanostructures and Institute of Physical Chemistry
- 76131 Karlsruhe
- Germany
- TU Braunschweig
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Lomont JP, Shearer AJ, Nguyen SC, Harris CB. Picosecond TRIR Studies of M3(CO)12 (M = Fe, Os) Clusters in Solution. Organometallics 2013. [DOI: 10.1021/om400056p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Justin P. Lomont
- Department of Chemistry,
University of California,
and Chemical Science Division, Lawrence Berkeley National Laboratory,
Berkeley, California 94720, United States
| | - Alex J. Shearer
- Department of Chemistry,
University of California,
and Chemical Science Division, Lawrence Berkeley National Laboratory,
Berkeley, California 94720, United States
| | - Son C. Nguyen
- Department of Chemistry,
University of California,
and Chemical Science Division, Lawrence Berkeley National Laboratory,
Berkeley, California 94720, United States
| | - Charles B. Harris
- Department of Chemistry,
University of California,
and Chemical Science Division, Lawrence Berkeley National Laboratory,
Berkeley, California 94720, United States
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Calhorda M, Hunstock E, Veiros L, Hartl F. Theoretical Studies of [Os3(CO)10(α-Diimine)]: Structures, Frontier Orbitals and Bonding. Eur J Inorg Chem 2001. [DOI: 10.1002/1099-0682(20011)2001:1<223::aid-ejic223>3.0.co;2-u] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hunstock E, Calhorda MJ, Hirva P, Pakkanen TA. Iron−Ruthenium−Osmium Mixed Trimetallic Carbonyl Clusters: Theoretical Studies and Structural Trends. Organometallics 2000. [DOI: 10.1021/om000512m] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elke Hunstock
- ITQB, Av. da República, EAN, Apart. 127, 2781-901 Oeiras, Portugal, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu 10, Finland
| | - Maria José Calhorda
- ITQB, Av. da República, EAN, Apart. 127, 2781-901 Oeiras, Portugal, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu 10, Finland
| | - Pipsa Hirva
- ITQB, Av. da República, EAN, Apart. 127, 2781-901 Oeiras, Portugal, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu 10, Finland
| | - Tapani A. Pakkanen
- ITQB, Av. da República, EAN, Apart. 127, 2781-901 Oeiras, Portugal, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal, and Department of Chemistry, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu 10, Finland
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Hunstock E, Mealli C, Calhorda MJ, Reinhold J. Molecular Structures of M(2)(CO)(9) and M(3)(CO)(12) (M = Fe, Ru, Os): New Theoretical Insights. Inorg Chem 1999; 38:5053-5060. [PMID: 11671250 DOI: 10.1021/ic9905289] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A different number of bridging carbonyls is found in bi- or trinuclear clusters having the title formulas. Comparative calculations at the SCF, MP2, and DFT levels of theory show that only the latter is able to describe properly the energetics of various isomers of the whole triad. For the first-row transition metal, DFT gives excellent agreement with the experimental structures, whereas the MP2 approach fails completely. Conversely for the second- and third-row metals, the best agreement with the experiment is obtained by the MP2 optimizations. The quantitative computational results, associated with a qualitative MO analysis, allow one to conclude that the structural preferences are determined by a critical balance of metal-bridge bonding, metal-metal bonding, and intermetallic repulsion. Although the M-M bond order is expected to be 1 in all cases, the bridge-supported bond is experimentally and computationally shorter than the unsupported one. By contrast, the trend for the overlap population (OP) is reversed, with even negative values for the shorter bridge bonds. For the latter, only a weak attractive interaction stems from the almost pure t(2g) orbitals, taken as metal lone pairs or eventually responsible for back-donation (formation of metal-bridge sigma bonds). Thus, the negative OP values are consistent with a prevailing repulsion between the latter levels. In the iron systems, with more contracted metal orbitals, the direct metal-metal repulsion is relatively weak while the metal-bridge bonds are sufficiently strong. This is not equally true for the more diffuse ruthenium and osmium orbitals, so the alternative nonbridged structure is preferred.
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Affiliation(s)
- Elke Hunstock
- Institut für Physikalische und Theoretische Chemie, Universität Leipzig, D-04103 Leipzig, Germany, Istituto per lo Studio della Stereochimica ed Energetica dei Composti di Coordinazione, CNR, I-50132 Firenze, Italy, Instituto de Tecnologia Química e Biológica, UNL, P-2781-901 Oeiras, Portugal, and Department of Chemistry and Biochemistry, Faculty of Science, University of Lisboa, P-1749-016 Lisboa, Portugal
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