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Troß J, Arias-Martinez JE, Carter-Fenk K, Cole-Filipiak NC, Schrader P, McCaslin LM, Head-Gordon M, Ramasesha K. Femtosecond Core-Level Spectroscopy Reveals Involvement of Triplet States in the Gas-Phase Photodissociation of Fe(CO) 5. J Am Chem Soc 2024; 146:22711-22723. [PMID: 39092878 DOI: 10.1021/jacs.4c07523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Excitation of iron pentacarbonyl [Fe(CO)5], a prototypical photocatalyst, at 266 nm causes the sequential loss of two CO ligands in the gas phase, creating catalytically active, unsaturated iron carbonyls. Despite numerous studies, major aspects of its ultrafast photochemistry remain unresolved because the early excited-state dynamics have so far eluded spectroscopic observation. This has led to the long-held assumption that ultrafast dissociation of gas-phase Fe(CO)5 proceeds exclusively on the singlet manifold. Herein, we present a combined experimental-theoretical study employing ultrafast extreme ultraviolet transient absorption spectroscopy near the Fe M2,3-edge, which features spectral evolution on 100 fs and 3 ps time scales, alongside high-level electronic structure theory, which enables characterization of the molecular geometries and electronic states involved in the ultrafast photodissociation of Fe(CO)5. We assign the 100 fs evolution to spectroscopic signatures associated with intertwined structural and electronic dynamics on the singlet metal-centered states during the first CO loss and the 3 ps evolution to the competing dissociation of Fe(CO)4 along the lowest singlet and triplet surfaces to form Fe(CO)3. Calculations of transient spectra in both singlet and triplet states as well as spin-orbit coupling constants along key structural pathways provide evidence for intersystem crossing to the triplet ground state of Fe(CO)4. Thus, our work presents the first spectroscopic detection of transient excited states during ultrafast photodissociation of gas-phase Fe(CO)5 and challenges the long-standing assumption that triplet states do not play a role in the ultrafast dynamics.
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Affiliation(s)
- Jan Troß
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
| | - Juan E Arias-Martinez
- Kenneth S. Pitzer Center for Theoretical Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kevin Carter-Fenk
- Kenneth S. Pitzer Center for Theoretical Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Neil C Cole-Filipiak
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
| | - Paul Schrader
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
| | - Laura M McCaslin
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
| | - Martin Head-Gordon
- Kenneth S. Pitzer Center for Theoretical Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Krupa Ramasesha
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
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2
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Cole-Filipiak NC, Troß J, Schrader P, McCaslin LM, Ramasesha K. Ultrafast infrared transient absorption spectroscopy of gas-phase Ni(CO) 4 photodissociation at 261 nm. J Chem Phys 2022; 156:144306. [DOI: 10.1063/5.0080844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We employ ultrafast mid-infrared transient absorption spectroscopy to probe the rapid loss of carbonyl ligands from gas-phase nickel tetracarbonyl following ultraviolet photoexcitation at 261 nm. Here, nickel tetracarbonyl undergoes prompt dissociation to produce nickel tricarbonyl in a singlet excited state; this electronically excited tricarbonyl loses another CO group over tens of picoseconds. Our results also suggest the presence of a parallel, concerted dissociation mechanism to produce nickel dicarbonyl in a triplet excited state, which likely dissociates to nickel monocarbonyl. Mechanisms for the formation of these photoproducts in multiple electronic excited states are theoretically predicted with one-dimensional cuts through the potential energy surfaces and computation of spin–orbit coupling constants using equation of motion coupled cluster methods (EOM-CC) and coupled cluster theory with single and double excitations (CCSD). Bond dissociation energies are calculated with CCSD, and anharmonic frequencies of ground and excited state species are computed using density functional theory (DFT) and time-dependent density functional theory (TD-DFT).
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Affiliation(s)
- Neil C. Cole-Filipiak
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Jan Troß
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Paul Schrader
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Laura M. McCaslin
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Krupa Ramasesha
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
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3
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Banerjee A, Coates MR, Kowalewski M, Wikmark H, Jay RM, Wernet P, Odelius M. Photoinduced bond oscillations in ironpentacarbonyl give delayed synchronous bursts of carbonmonoxide release. Nat Commun 2022; 13:1337. [PMID: 35288563 PMCID: PMC8921231 DOI: 10.1038/s41467-022-28997-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 02/21/2022] [Indexed: 12/26/2022] Open
Abstract
Early excited state dynamics in the photodissociation of transition metal carbonyls determines the chemical nature of short-lived catalytically active reaction intermediates. However, time-resolved experiments have not yet revealed mechanistic details in the sub-picosecond regime. Hence, in this study the photoexcitation of ironpentacarbonyl Fe(CO)5 is simulated with semi-classical excited state molecular dynamics. We find that the bright metal-to-ligand charge-transfer (MLCT) transition induces synchronous Fe-C oscillations in the trigonal bipyramidal complex leading to periodically reoccurring release of predominantly axial CO. Metaphorically the photoactivated Fe(CO)5 acts as a CO geyser, as a result of dynamics in the potential energy landscape of the axial Fe-C distances and non-adiabatic transitions between manifolds of bound MLCT and dissociative metal-centered (MC) excited states. The predominant release of axial CO ligands and delayed release of equatorial CO ligands are explained in a unified mechanism based on the σ*(Fe-C) anti-bonding character of the receiving orbital in the dissociative MC states. The photodissociation of transition metal carbonyls is involved in catalysis and synthetic processes. Here the authors, using semi-classical excited state molecular dynamics, observe details of the early stage dynamics in the photodissociation of Fe(CO)5, including synchronous bursts of CO at periodic intervals of 90 femtoseconds.
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Nagamori K, Haze M, Nakata H, Zingsheim O, Yamasaki K, Kohguchi H. Generation of Highly Vibrationally Excited CO in Sequential Photodissociation of Iron Carbonyl Complexes. J Phys Chem A 2022; 126:306-313. [PMID: 35007077 DOI: 10.1021/acs.jpca.1c09922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ultraviolet photochemistry of iron pentacarbonyl, Fe(CO)5, was investigated with resonantly enhanced multiphoton ionization (REMPI) spectroscopy and ion imaging. The REMPI spectrum of CO photofragments, generated by ultraviolet irradiation of Fe(CO)5, showed the generation in the highly vibrationally excited states with v = 11-15. Analysis of the band intensities observed in the 213-235 nm region indicated that the high-v CO generation was maximized at around 220 nm. Generation yields of the coordinatively unsaturated intermediates, Fe(CO)n=1-4, were measured as a function of the photolysis wavelength using a nonresonant detection scheme. The yield spectrum of FeCO was correlated with that of the high-v CO fragments, suggesting high-v CO generation in the photodissociation of FeCO. The density functional theory calculations of the excited states of FeCO showed an intense photoabsorption to the metal-centered state near 220 nm. The theoretical results were consistent with the interpretation of FeCO + hν → Fe + high-v CO, which was experimentally indicated. The momentum distribution obtained from the velocity distributions of Fe, Fe(CO)4, and CO fragments further supported that Fe is the counter-product of the high-v CO fragment. The present results provided selective observation of the photochemistry of the unsaturated iron carbonyl complexes, which has not been well elucidated in laser-based experiments because of the uncontrollable sequential photodissociation producing mixed Fe(CO)n intermediates.
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Affiliation(s)
- Keigo Nagamori
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Misato Haze
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Hiroyuki Nakata
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Oliver Zingsheim
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany
| | - Katsuyoshi Yamasaki
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Hiroshi Kohguchi
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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5
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6
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Cole-Filipiak NC, Troß J, Schrader P, McCaslin LM, Ramasesha K. Ultraviolet photodissociation of gas-phase iron pentacarbonyl probed with ultrafast infrared spectroscopy. J Chem Phys 2021; 154:134308. [PMID: 33832268 DOI: 10.1063/5.0041074] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
It is well known that ultraviolet photoexcitation of iron pentacarbonyl results in rapid loss of carbonyl ligands leading to the formation of coordinatively unsaturated iron carbonyl compounds. We employ ultrafast mid-infrared transient absorption spectroscopy to probe the photodissociation dynamics of gas-phase iron pentacarbonyl following ultraviolet excitation at 265 and 199 nm. After photoexcitation at 265 nm, our results show evidence for sequential dissociation of iron pentacarbonyl to form iron tricarbonyl via a short-lived iron tetracarbonyl intermediate. Photodissociation at 199 nm results in the prompt production of Fe(CO)3 within 0.25 ps via several energetically accessible pathways. An additional 15 ps time constant extracted from the data is tentatively assigned to intersystem crossing to the triplet manifold of iron tricarbonyl or iron dicarbonyl. Mechanisms for formation of iron tetracarbonyl, iron tricarbonyl, and iron dicarbonyl are proposed and theoretically validated with one-dimensional cuts through the potential energy surface as well as bond dissociation energies. Ground state calculations are computed at the CCSD(T) level of theory and excited states are computed with EOM-EE-CCSD(dT).
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Affiliation(s)
- Neil C Cole-Filipiak
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Jan Troß
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Paul Schrader
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Laura M McCaslin
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Krupa Ramasesha
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
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7
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Drance MJ, Wang S, Gembicky M, Rheingold AL, Figueroa JS. Probing for Four-Coordinate Zerovalent Iron in a π-Acidic Ligand Field: A Functional Source of FeL4 Enabled by Labile Dinitrogen Binding. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Myles J. Drance
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Mail Code 0358, La Jolla, California 92093, United States
| | - Shuai Wang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Mail Code 0358, La Jolla, California 92093, United States
| | - Milan Gembicky
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Mail Code 0358, La Jolla, California 92093, United States
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Mail Code 0358, La Jolla, California 92093, United States
| | - Joshua S. Figueroa
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, Mail Code 0358, La Jolla, California 92093, United States
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8
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Lutz SA, Hickey AK, Gao Y, Chen CH, Smith JM. Two-State Reactivity in Iron-Catalyzed Alkene Isomerization Confers σ-Base Resistance. J Am Chem Soc 2020; 142:15527-15535. [PMID: 32786744 DOI: 10.1021/jacs.0c07300] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A low-coordinate, high spin (S = 3/2) organometallic iron(I) complex is a catalyst for the isomerization of alkenes. A combination of experimental and computational mechanistic studies supports a mechanism in which alkene isomerization occurs by the allyl mechanism. Importantly, while substrate binding occurs on the S = 3/2 surface, oxidative addition to an η1-allyl intermediate only occurs on the S = 1/2 surface. Since this spin state change is only possible when the alkene substrate is bound, the catalyst has high immunity to typical σ-base poisons due to the antibonding interactions of the high spin state.
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Affiliation(s)
- Sean A Lutz
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Anne K Hickey
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Yafei Gao
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Chun-Hsing Chen
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Jeremy M Smith
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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9
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Vöhringer P. Vibrations tell the tale. A time-resolved mid-infrared perspective of the photochemistry of iron complexes. Dalton Trans 2020; 49:256-266. [DOI: 10.1039/c9dt04165f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Time-resolved infrared spectroscopies are used to elucidate multiscalar photochemical processes of iron complexes.
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Affiliation(s)
- Peter Vöhringer
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
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10
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One‐ and Two‐Photon‐Induced Photochemistry of Iron Pentacarbonyl [Fe(CO)
5
]: Insights from Coupled Cluster Response Theory. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900111] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Kadassery KJ, Sethi K, Fanara PM, Lacy DC. CO-Photolysis-Induced H-Atom Transfer from MnIO–H Bonds. Inorg Chem 2019; 58:4679-4685. [DOI: 10.1021/acs.inorgchem.9b00322] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Karthika J. Kadassery
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Komal Sethi
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Paul M. Fanara
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - David C. Lacy
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
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12
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Zhang ZF, Su MD. The mechanistic investigations of photochemical decarbonylations and oxidative addition reactions for M(CO) 5 (M = Fe, Ru, Os) complexes. RSC Adv 2019; 9:2626-2640. [PMID: 35520498 PMCID: PMC9059829 DOI: 10.1039/c8ra07669c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 12/07/2018] [Indexed: 11/21/2022] Open
Abstract
The mechanisms for the photochemical CO-dissociation and the oxidative addition reactions are studied theoretically using three model systems: M(CO)5 (M = Fe, Ru, and Os) and the CASSCF/Def2-SVP (fourteen-electron/ten-orbital active space) and MP2-CAS/Def2-SVP//CASSCF/Def2-SVP methods. The structures of the intersystem crossings and the conical intersections, which play a decisive role in these CO photo-extrusion reactions, are determined. The intermediates and the transition structures in either the singlet or triplet states are also computed, in order to explain the reaction routes. These model studies suggest that after the irradiation of Fe(CO)5 with UV light, it quickly loses one CO molecule to generate a 16-electron iron tetracarbonyl, in either the singlet or the triplet states. It is found that the triplet Fe(CO)4 plays a vital role in the formation of the final oxidative addition product, Fe(CO)4(H)(SiMe3), but the singlet Fe(CO)4 plays a relatively minor role in the formation of the final product. However, its vacant coordination site interacts weakly with solvent molecules ((Me3)SiH) to yield the alkyl-solvated iron complexes, which are detectable experimentally. The theoretical observations show that Ru(CO)5 and Os(CO)5 have similar photochemical and thermal potential energy profiles. In particular, this study demonstrates that the oxidative addition yield for Fe is much greater than those for its Ru and Os counterparts, under the same chemical conditions.
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Affiliation(s)
- Zheng-Feng Zhang
- Department of Applied Chemistry, National Chiayi UniversityChiayi 60004Taiwan
| | - Ming-Der Su
- Department of Applied Chemistry, National Chiayi UniversityChiayi 60004Taiwan,Department of Medicinal and Applied Chemistry, Kaohsiung Medical UniversityKaohsiung 80708Taiwan
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13
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Nakata H, Nagamori K, Yamasaki K, Kohguchi H. Detection of direct NO ligand loss in the ultraviolet photodissociation of Co(CO)3NO. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.07.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Leitner T, Josefsson I, Mazza T, Miedema PS, Schröder H, Beye M, Kunnus K, Schreck S, Düsterer S, Föhlisch A, Meyer M, Odelius M, Wernet P. Time-resolved electron spectroscopy for chemical analysis of photodissociation: Photoelectron spectra of Fe(CO)5, Fe(CO)4, and Fe(CO)3. J Chem Phys 2018; 149:044307. [DOI: 10.1063/1.5035149] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T. Leitner
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - I. Josefsson
- Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden
| | - T. Mazza
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - P. S. Miedema
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - H. Schröder
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, 14476 Potsdam, Germany
| | - M. Beye
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - K. Kunnus
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, 14476 Potsdam, Germany
| | - S. Schreck
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, 14476 Potsdam, Germany
| | - S. Düsterer
- Deutsches Elektronen-Synchrotron DESY, FS-FLASH, Notkestrasse 85, 22607 Hamburg, Germany
| | - A. Föhlisch
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, 14476 Potsdam, Germany
| | - M. Meyer
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - M. Odelius
- Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden
| | - Ph. Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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15
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Kadassery KJ, Dey SK, Cannella AF, Surendhran R, Lacy DC. Photochemical Water-Splitting with Organomanganese Complexes. Inorg Chem 2017; 56:9954-9965. [PMID: 28767229 DOI: 10.1021/acs.inorgchem.7b01483] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Certain organometallic chromophores with water-derived ligands, such as the known [Mn(CO)3(μ3-OH)]4 (1) tetramer, drew our attention as possible platforms to study water-splitting reactions. Herein, we investigate the UV irradiation of various tricarbonyl organomanganese complexes, including 1, and demonstrate that dihydrogen, CO, and hydrogen peroxide form as products in a photochemical water-splitting decomposition reaction. The organic and manganese-containing side products are also characterized. Labeling studies with 18O-1 suggest that the source of oxygen atoms in H2O2 originates from free water that interacts with 1 after photochemical dissociation of CO (1-CO) constituting the oxidative half-reaction of water splitting mediated by 1. Hydrogen production from 1 is the result of several different processes, one of which involves the protons derived from the hydroxido ligands in 1 constituting the reductive half-reaction of water splitting mediated by 1. Other processes that generate H2 are also operative and are described. Collectively the results from the photochemical decomposition of 1 provide an opportunity to propose a mechanism, and it is discussed within the context of developing new strategies for water-splitting reactions with organomanganese complexes.
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Affiliation(s)
- Karthika J Kadassery
- Department of Chemistry, University at Buffalo, State University of New York , Buffalo, New York 14260, United States
| | - Suman Kr Dey
- Department of Chemistry, University at Buffalo, State University of New York , Buffalo, New York 14260, United States
| | - Anthony F Cannella
- Department of Chemistry, University at Buffalo, State University of New York , Buffalo, New York 14260, United States
| | - Roshaan Surendhran
- Department of Chemistry, University at Buffalo, State University of New York , Buffalo, New York 14260, United States
| | - David C Lacy
- Department of Chemistry, University at Buffalo, State University of New York , Buffalo, New York 14260, United States
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16
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Gurentsov EV. UV laser synthesis of nanoparticles in the gas phase. KINETICS AND CATALYSIS 2017. [DOI: 10.1134/s0023158417030077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Wernet P, Leitner T, Josefsson I, Mazza T, Miedema PS, Schröder H, Beye M, Kunnus K, Schreck S, Radcliffe P, Düsterer S, Meyer M, Odelius M, Föhlisch A. Communication: Direct evidence for sequential dissociation of gas-phase Fe(CO) 5 via a singlet pathway upon excitation at 266 nm. J Chem Phys 2017; 146:211103. [PMID: 28595420 PMCID: PMC5457291 DOI: 10.1063/1.4984774] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 05/18/2017] [Indexed: 11/14/2022] Open
Abstract
We prove the hitherto hypothesized sequential dissociation of Fe(CO)5 in the gas phase upon photoexcitation at 266 nm via a singlet pathway with time-resolved valence and core-level photoelectron spectroscopy with an x-ray free-electron laser. Valence photoelectron spectra are used to identify free CO molecules and to determine the time constants of stepwise dissociation to Fe(CO)4 within the temporal resolution of the experiment and further to Fe(CO)3 within 3 ps. Fe 3p core-level photoelectron spectra directly reflect the singlet spin state of the Fe center in Fe(CO)5, Fe(CO)4, and Fe(CO)3 showing that the dissociation exclusively occurs along a singlet pathway without triplet-state contribution. Our results are important for assessing intra- and intermolecular relaxation processes in the photodissociation dynamics of the prototypical Fe(CO)5 complex in the gas phase and in solution, and they establish time-resolved core-level photoelectron spectroscopy as a powerful tool for determining the multiplicity of transition metals in photochemical reactions of coordination complexes.
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Affiliation(s)
- Ph Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - T Leitner
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - I Josefsson
- Department of Physics, Stockholm University, AlbaNova University Center, 106 91 Stockholm, Sweden
| | - T Mazza
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - P S Miedema
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - H Schröder
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - M Beye
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - K Kunnus
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - S Schreck
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - P Radcliffe
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - S Düsterer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M Meyer
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - M Odelius
- Department of Physics, Stockholm University, AlbaNova University Center, 106 91 Stockholm, Sweden
| | - A Föhlisch
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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18
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Kunnus K, Josefsson I, Rajkovic I, Schreck S, Quevedo W, Beye M, Weniger C, Grübel S, Scholz M, Nordlund D, Zhang W, Hartsock RW, Gaffney KJ, Schlotter WF, Turner JJ, Kennedy B, Hennies F, de Groot FMF, Techert S, Odelius M, Wernet P, Föhlisch A. Identification of the dominant photochemical pathways and mechanistic insights to the ultrafast ligand exchange of Fe(CO)5 to Fe(CO)4EtOH. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2016; 3:043204. [PMID: 26958587 PMCID: PMC4752567 DOI: 10.1063/1.4941602] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 01/22/2016] [Indexed: 05/19/2023]
Abstract
We utilized femtosecond time-resolved resonant inelastic X-ray scattering and ab initio theory to study the transient electronic structure and the photoinduced molecular dynamics of a model metal carbonyl photocatalyst Fe(CO)5 in ethanol solution. We propose mechanistic explanation for the parallel ultrafast intra-molecular spin crossover and ligation of the Fe(CO)4 which are observed following a charge transfer photoexcitation of Fe(CO)5 as reported in our previous study [Wernet et al., Nature 520, 78 (2015)]. We find that branching of the reaction pathway likely happens in the (1)A1 state of Fe(CO)4. A sub-picosecond time constant of the spin crossover from (1)B2 to (3)B2 is rationalized by the proposed (1)B2 → (1)A1 → (3)B2 mechanism. Ultrafast ligation of the (1)B2 Fe(CO)4 state is significantly faster than the spin-forbidden and diffusion limited ligation process occurring from the (3)B2 Fe(CO)4 ground state that has been observed in the previous studies. We propose that the ultrafast ligation occurs via (1)B2 → (1)A1 → (1)A' Fe(CO)4EtOH pathway and the time scale of the (1)A1 Fe(CO)4 state ligation is governed by the solute-solvent collision frequency. Our study emphasizes the importance of understanding the interaction of molecular excited states with the surrounding environment to explain the relaxation pathways of photoexcited metal carbonyls in solution.
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Affiliation(s)
| | - I Josefsson
- Department of Physics, Stockholm University , AlbaNova University Centre, 10691 Stockholm, Sweden
| | - I Rajkovic
- Max Planck Institute for Biophysical Chemistry , Am Fassberg 11, 37070 Göttingen, Germany
| | | | - W Quevedo
- Institute for Methods and Instrumentation for Synchrotron Radiation Research , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - M Beye
- Institute for Methods and Instrumentation for Synchrotron Radiation Research , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - C Weniger
- Institute for Methods and Instrumentation for Synchrotron Radiation Research , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - S Grübel
- Max Planck Institute for Biophysical Chemistry , Am Fassberg 11, 37070 Göttingen, Germany
| | - M Scholz
- Max Planck Institute for Biophysical Chemistry , Am Fassberg 11, 37070 Göttingen, Germany
| | - D Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Menlo Park, California 94025, USA
| | - W Zhang
- PULSE Institute , SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - R W Hartsock
- PULSE Institute , SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - K J Gaffney
- PULSE Institute , SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - W F Schlotter
- Linac Coherent Light Source, SLAC National Accelerator Laboratory , Menlo Park, California 94025, USA
| | - J J Turner
- Linac Coherent Light Source, SLAC National Accelerator Laboratory , Menlo Park, California 94025, USA
| | - B Kennedy
- Institute for Methods and Instrumentation for Synchrotron Radiation Research , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - F Hennies
- MAX-lab , P.O. Box 118, 221 00 Lund, Sweden
| | - F M F de Groot
- Department of Chemistry, Utrecht University , Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | | | - M Odelius
- Department of Physics, Stockholm University , AlbaNova University Centre, 10691 Stockholm, Sweden
| | - Ph Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research , Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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19
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Sunada Y, Soejima H, Nagashima H. Disilaferracycle Dicarbonyl Complex Containing Weakly Coordinated η2-(H-Si) Ligands: Application to C–H Functionalization of Indoles and Arenes. Organometallics 2014. [DOI: 10.1021/om500794f] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yusuke Sunada
- Institute
for Materials Chemistry and Engineering. Kyushu University, 6-1
Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
| | - Hiroe Soejima
- Institute
for Materials Chemistry and Engineering. Kyushu University, 6-1
Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
| | - Hideo Nagashima
- Institute
for Materials Chemistry and Engineering. Kyushu University, 6-1
Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
- CREST, Japan Science and Technology Agency (JST), 6-1 Kasugakoen, Kasuga, Fukuoka, 816-8580, Japan
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20
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Asatryan R, Ruckenstein E. Mechanism of Iron Carbonyl-Catalyzed Hydrogenation of Ethylene. 1. Theoretical Exploration of Molecular Pathways. J Phys Chem A 2013; 117:10912-32. [DOI: 10.1021/jp406878k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rubik Asatryan
- Department of Chemical
and
Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Eli Ruckenstein
- Department of Chemical
and
Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
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21
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Sunada Y, Imaoka T, Nagashima H. Disilametallacycles as a Platform for Stabilizing M(II) and M(IV) (M = Fe, Ru) Centers: Synthesis and Characterization of Half-Sandwich Complexes and Their Application to Catalytic Double Silylation of Alkenes and Alkynes. Organometallics 2013. [DOI: 10.1021/om3012322] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Yusuke Sunada
- Institute
for Materials Chemistry and Engineering, and ‡Graduate School of Engineering
Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Tsuyoshi Imaoka
- Institute
for Materials Chemistry and Engineering, and ‡Graduate School of Engineering
Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Hideo Nagashima
- Institute
for Materials Chemistry and Engineering, and ‡Graduate School of Engineering
Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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22
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Nguyen SC, Lomont JP, Zoerb MC, Hill AD, Schlegel JP, Harris CB. Chemistry of the Triplet 14-Electron Complex Fe(CO)3 in Solution Studied by Ultrafast Time-Resolved IR Spectroscopy. Organometallics 2012. [DOI: 10.1021/om3002075] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Son C. Nguyen
- Department of Chemistry, University of California, Berkeley, California, 94720,
United States
- Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United
States
| | - Justin P. Lomont
- Department of Chemistry, University of California, Berkeley, California, 94720,
United States
- Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United
States
| | - Matthew C. Zoerb
- Department of Chemistry, University of California, Berkeley, California, 94720,
United States
| | - Adam D. Hill
- Department of Chemistry, University of California, Berkeley, California, 94720,
United States
- Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United
States
| | - Jacob P. Schlegel
- Department of Chemistry, University of California, Berkeley, California, 94720,
United States
- Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United
States
| | - Charles B. Harris
- Department of Chemistry, University of California, Berkeley, California, 94720,
United States
- Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United
States
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23
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Nomura M, Fujita-Takayama C, Sugiyama T, Kajitani M. Diverse reactivities of aromaticity–unsaturation coexisted metalladithiolene rings. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.06.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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Guermoune A, Cherqaoui D, Jarid A, Liebman JF. Structure and decomposition of [HFe(CO)4(B2H5)], a revised behavior of an old uncharacterized complex. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.03.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Vibronic Coupling In Inorganic Systems: Photochemistry, Conical Intersections, And The Jahn–Teller And Pseudo-Jahn–Teller Effects. ADVANCES IN INORGANIC CHEMISTRY 2010. [DOI: 10.1016/s0898-8838(10)62009-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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27
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Besora M, Carreón-Macedo JL, Cowan AJ, George MW, Harvey JN, Portius P, Ronayne KL, Sun XZ, Towrie M. A Combined Theoretical and Experimental Study on the Role of Spin States in the Chemistry of Fe(CO)5 Photoproducts. J Am Chem Soc 2009; 131:3583-92. [DOI: 10.1021/ja807149t] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria Besora
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - José-Luis Carreón-Macedo
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - Alexander J. Cowan
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - Michael W. George
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - Jeremy N. Harvey
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - Peter Portius
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - Kate L. Ronayne
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - Xue-Zhong Sun
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
| | - Michael Towrie
- School of Chemistry, University of Nottingham, University Park Nottingham, Nottingham, NG7 2RD, U.K., Centre for Computational Chemistry and School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K., and STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 QX, U.K
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28
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Besora M, Carreón-Macedo JL, Cimas Á, Harvey JN. Spin-state changes and reactivity in transition metal chemistry: Reactivity of iron tetracarbonyl. ADVANCES IN INORGANIC CHEMISTRY 2009. [DOI: 10.1016/s0898-8838(09)00210-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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29
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Estephane J, Groppo E, Vitillo JG, Damin A, Lamberti C, Bordiga S, Zecchina A. Chromocene in porous polystyrene: an example of organometallic chemistry in confined spaces. Phys Chem Chem Phys 2009; 11:2218-27. [DOI: 10.1039/b814109f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Sawyer KR, Glascoe EA, Cahoon JF, Schlegel JP, Harris CB. Mechanism for Iron-Catalyzed Alkene Isomerization in Solution. Organometallics 2008. [DOI: 10.1021/om800481r] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Karma R. Sawyer
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Elizabeth A. Glascoe
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - James F. Cahoon
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Jacob P. Schlegel
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Charles B. Harris
- Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
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31
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Carreón-Macedo JL, Harvey JN. Computational study of the energetics of3Fe(CO)4,1Fe(CO)4and1Fe(CO)4(L), L = Xe, CH4, H2and CO. Phys Chem Chem Phys 2006; 8:93-100. [PMID: 16482248 DOI: 10.1039/b513325d] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Large basis CCSD(T) calculations are used to calculate the energetics of 3Fe(CO)4, 1Fe(CO)4 and 1Fe(CO)4(L), L = Xe, CH4, H2 and CO. . The relative energy of the excited singlet state of Fe(CO)4 with respect to the ground triplet state is not known experimentally, and various lower levels of theory predict very different results. Upon extrapolating to the infinite basis set limit, and including corrections for core-core and core-valence correlation, scalar relativity, and multi-reference character of the wavefunction, the best CCSD(T) estimate for the spin-state splitting in iron tetracarbonyl is 2 kcal mol(-1). Calculation of the dissociation energy of 1Fe(CO)4(L) into singlet fragments, taken together with known experimental behaviour of triplet Fe(CO)4, provides independent evidence for the fact that the spin-state splitting is smaller than 3 kcal mol(-1). These calculations highlight some of the challenges involved in benchmark calculations on transition metal containing systems.
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32
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Lee T, Welch E, Rose-Petruck CG. Structure of Solvated Fe(CO)5: A Concerted XAFS, FTIR, and DFT Study of Solvation in Fluorinated Arenes. J Phys Chem A 2004. [DOI: 10.1021/jp047504u] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Taewoo Lee
- Department of Chemistry, Brown University, Box H, Providence, Rhode Island 02912
| | - Emma Welch
- Department of Chemistry, Brown University, Box H, Providence, Rhode Island 02912
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33
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34
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Portius P, Yang J, Sun XZ, Grills DC, Matousek P, Parker AW, Towrie M, George MW. Unraveling the Photochemistry of Fe(CO)5 in Solution: Observation of Fe(CO)3 and the Conversion between 3Fe(CO)4 and 1Fe(CO)4(Solvent). J Am Chem Soc 2004; 126:10713-20. [PMID: 15327330 DOI: 10.1021/ja048411t] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The photochemistry of Fe(CO)5 (5) has been studied in heptane, supercritical (sc) Ar, scXe, and scCH4 using time-resolved infrared spectroscopy (TRIR). 3Fe(CO)4 ((3)4) and Fe(CO)3(solvent) (3) are formed as primary photoproducts within the first few picoseconds. Complex 3 is formed via a single-photon process. In heptane, scCH4, and scXe, (3)4 decays to form (1)4 x L (L = heptane, CH4, or Xe) as well as reacting with 5 to form Fe2(CO)9. In heptane, 3 reacts with CO to form (1)4 x L. The conversion of (3)4 to (1)4 x L has been monitored directly for the first time (L = heptane, kobs = 7.8(+/- 0.3) x 10(7) s(-1); scCH4, 5(+/- 1) x 10(6) s(-1); scXe, 2.1(+/- 0.1) x 10(7) s(-1)). In scAr, (3)4 and 3 react with CO to form 5 and (3)4, respectively. We have determined the rate constant (kCO = 1.2 x 10(7) dm3 mol(-1) s(-1)) for the reaction of (3)4 with CO in scAr, and this is very similar to the value obtained previously in the gas phase. Doping the scAr with either Xe or CH4 resulted in (3)4 reacting with Xe or CH4 to form (1)4 x Xe or (1)4 x CH4. The relative yield, [(3)4]:[3] decreases in the order heptane > scXe > scCH4 >> scAr, and pressure-dependent measurements in scAr and scCH4 indicate an influence of the solvent density on this ratio.
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Affiliation(s)
- Peter Portius
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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35
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Bessac F, Alary F, Poteau R, Heully JL, Daudey JP. Modeling a Carbonyl Group Taking into Account Back-Donation Effects through the Effective Group Potential Method. J Phys Chem A 2003. [DOI: 10.1021/jp035020c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fabienne Bessac
- Laboratoire de Physique Quantique, UMR 5626 du CNRS, IRSAMC, Université Paul Sabatier, 118 route de Narbonne, F31062 Toulouse Cedex, France
| | - Fabienne Alary
- Laboratoire de Physique Quantique, UMR 5626 du CNRS, IRSAMC, Université Paul Sabatier, 118 route de Narbonne, F31062 Toulouse Cedex, France
| | - Romuald Poteau
- Laboratoire de Physique Quantique, UMR 5626 du CNRS, IRSAMC, Université Paul Sabatier, 118 route de Narbonne, F31062 Toulouse Cedex, France
| | - Jean-Louis Heully
- Laboratoire de Physique Quantique, UMR 5626 du CNRS, IRSAMC, Université Paul Sabatier, 118 route de Narbonne, F31062 Toulouse Cedex, France
| | - Jean-Pierre Daudey
- Laboratoire de Physique Quantique, UMR 5626 du CNRS, IRSAMC, Université Paul Sabatier, 118 route de Narbonne, F31062 Toulouse Cedex, France
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36
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Parnis JM, Thompson MGK, Ashenhurst LM. Matrix Isolation of Electron Bombarded Gases Containing Fe(CO)5: An FTIR Absorption Study of Neutral and Anion Decomposition Products. J Phys Chem A 2003. [DOI: 10.1021/jp030525o] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- J. Mark Parnis
- Department of Chemistry, Trent University, Peterborough, ON, Canada K9J 7B8
| | | | - Lisa M. Ashenhurst
- Department of Chemistry, Trent University, Peterborough, ON, Canada K9J 7B8
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37
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Goumans TPM, Ehlers AW, van Hemert MC, Rosa A, Baerends EJ, Lammertsma K. Photodissociation of the phosphine-substituted transition metal carbonyl complexes Cr(CO)(5)L and Fe(CO)(4)L: a theoretical study. J Am Chem Soc 2003; 125:3558-67. [PMID: 12643718 DOI: 10.1021/ja029135q] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The photochemistry of the phosphine-substituted transition metal carbonyl complexes Cr(CO)(5)PH(3) and ax-Fe(CO)(4)PH(3) is studied with time-dependent DFT theory to explore the propensity of the excited molecules to expel their ligands. The influence of the PH(3) ligand on the properties of these complexes is compared with the photodissociation behavior of the binary carbonyl complexes Cr(CO)(6) and Fe(CO)(5). The lowest excited states of Cr(CO)(5)PH(3) are metal-to-ligand charge transfer (MLCT) states, of which the first three are repulsive for PH(3) but modestly bonding for the axial and equatorial CO ligands. The repulsive nature is due to mixing of the initial MLCT state with a ligand field (LF) state. A barrier is encountered along the dissociation coordinate if the avoided crossing between these states occurs beyond the equilibrium distance. This is the case for expulsion of CO but not for the PH(3) group as the avoided state crossing occurs within the equilibrium Cr-P distance. The lowest excited state of ax-Fe(CO)(4)PH(3) is a LF state that is repulsive for both PH(3) and the axial CO. Excited-state quantum dynamics calculations for this state show a branching ratio of 99 to 1 for expulsion of the axial phosphine ligand over an axial CO ligand. The nature of the phosphorus ligand in these Cr and Fe complexes is only of modest importance. Complexes containing the three-membered phosphirane or unsaturated phosphirene rings have dissociation curves for their lowest excited states that are similar to those having a PH(3) ligand. Analysis of their ground-state Cr-P bond properties in conjunction with frontier orbital arguments indicate these small heterocyclic groups to differ from the PH(3) group mainly by their enhanced sigma-donating ability. All calculations indicate that the excited Cr(CO)(5)L and Fe(CO)(4)L molecules (L = PH(3), PC(2)H(5), and PC(2)H(3)) prefer dissociation of their phosphorus substituent over that of an CO ligand. This suggests that the photochemical approach may be a viable complement to the ligand exchange and redox methods that are currently employed to demetalate transition metal complexed organophosphorus compounds.
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Affiliation(s)
- T P M Goumans
- Department of Chemistry, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, NL-1081 HV, Amsterdam, The Netherlands
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38
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Burke DJ, Vondrak T, Meech SR. Photochemistry of Fe(CO)5 Adsorbed on Single Crystal and Roughened Silver. J Phys Chem B 2002. [DOI: 10.1021/jp021286s] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daren J. Burke
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Tomas Vondrak
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Stephen R. Meech
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
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Abstract
The structure of the singlet state (1 A1 ) of [Fe(CO)4 ] in the gas phase has been determined by a combination of laser photochemistry of [Fe(CO)5 ] and electron diffraction imaging. The ground state of [Fe(CO)4 ] is known to be a triplet species (3 B2 ), and this is the species detected in picosecond time-resolved IR experiments with [Fe(CO)5 ] in solution. This is an appropriate moment to survey the state of knowledge on [Fe(CO)4 ], beginning from the first low-temperature matrix experiments.
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Affiliation(s)
- Martyn Poliakoff
- School of Chemistry University of Nottingham Nottingham, NG7 2RD (UK) Fax: (+44) 115-951-3058
| | - James J Turner
- School of Chemistry University of Nottingham Nottingham, NG7 2RD (UK) Fax: (+44) 115-951-3058
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Snee PT, Payne CK, Mebane SD, Kotz KT, Harris CB. Dynamics of Photosubstitution Reactions of Fe(CO)5: An Ultrafast Infrared Study of High Spin Reactivity. J Am Chem Soc 2001. [DOI: 10.1021/ja010648r] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Preston T. Snee
- Contribution from the Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Christine K. Payne
- Contribution from the Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Sheryl D. Mebane
- Contribution from the Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Kenneth T. Kotz
- Contribution from the Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Charles B. Harris
- Contribution from the Department of Chemistry, University of California, Berkeley, California 94720, and Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
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Wang J, Long GT, Weitz E. Real Time Infrared Spectroscopic Probe of the Reactions of Fe(CO)3 and Fe(CO)4 with N2 in the Gas Phase. J Phys Chem A 2001. [DOI: 10.1021/jp003096s] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiaqiang Wang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Gregory T. Long
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Eric Weitz
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
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Snee PT, Payne CK, Kotz KT, Yang H, Harris CB. Triplet organometallic reactivity under ambient conditions: an ultrafast UV pump/IR probe study. J Am Chem Soc 2001; 123:2255-64. [PMID: 11456872 DOI: 10.1021/ja002350r] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity of triplet 16-electron organometallic species has been studied in room-temperature solution using femtosecond UV pump IR probe spectroscopy. Specifically, the Si-H bond-activation reaction of photogenerated triplet Fe(CO)(4) and triplet CpCo(CO) with triethylsilane has been characterized and compared to the known singlet species CpRh(CO). The intermediates observed were studied using density functional theory (DFT) as well as ab initio quantum chemical calculations. The triplet organometallics have a greater overall reactivity than singlet species due to a change in the Si-H activation mechanism, which is due to the fact that triplet intermediates coordinate weakly at best with the ethyl groups of triethylsilane. Consequently, the triplet species do not become trapped in alkyl-solvated intermediate states. The experimental results are compared to the theoretical calculations, which qualitatively reproduce the trends in the data.
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Affiliation(s)
- P T Snee
- Contribution from the Department of Chemistry, University of California, Berkeley, California 94720, USA
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