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Donald WA, McKenzie CJ, O'Hair RAJ. C-H bond activation of methanol and ethanol by a high-spin Fe(IV)O biomimetic complex. Angew Chem Int Ed Engl 2011; 50:8379-83. [PMID: 21717542 DOI: 10.1002/anie.201102146] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Indexed: 11/08/2022]
Affiliation(s)
- William A Donald
- School of Chemistry, Bio21 Institute of Molecular Science and Biotechnology, and ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, University of Melbourne, Melbourne, Victoria 3010, Australia
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Donald WA, McKenzie CJ, O'Hair RAJ. CH Bond Activation of Methanol and Ethanol by a High-Spin FeIVO Biomimetic Complex. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102146] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Altinay G, Metz RB. Vibrational spectroscopy of intermediates in benzene-to-pheno conversion by FeO+. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2010; 21:750-757. [PMID: 20181494 DOI: 10.1016/j.jasms.2010.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 01/07/2010] [Accepted: 01/07/2010] [Indexed: 05/28/2023]
Abstract
Gas-phase FeO(+) can convert benzene to phenol under thermal conditions. Two key intermediates of this reaction are the [HO-Fe-C(6)H(5)](+) insertion intermediate and Fe(+)(C(6)H(5)OH) exit channel complex. These intermediates are selectively formed by reaction of laser ablated Fe(+) with specific organic precursors and are cooled in a supersonic expansion. Vibrational spectra of the sextet and quartet states of the intermediates in the O-H stretching region are measured by infrared multiphoton dissociation (IRMPD). For Fe(+)(C(6)H(5)OH), the O-H stretch is observed at 3598 cm(-1). Photodissociation primarily produces Fe(+) + C(6)H(5)OH; Fe(+)(C(6)H(4)) + H(2)O is also observed. IRMPD of [HO-Fe-C(6)H(5)](+) mainly produces FeOH(+) + C(6)H(5) and the O-H stretch spectrum consists of a peak at approximately 3700 cm(-1) with a shoulder at approximately 3670 cm(-1). Analysis of the experimental results is aided by comparison with hybrid density functional theory computed frequencies. Also, an improved potential energy surface for the FeO(+) + C(6)H(6) reaction is developed based on CBS-QB3 calculations for the reactants, intermediates, transition states, and products.
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Affiliation(s)
- Gokhan Altinay
- Department of Chemistry, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA
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Roithová J, Schröder D. Selective activation of alkanes by gas-phase metal ions. Chem Rev 2010; 110:1170-211. [PMID: 20041696 DOI: 10.1021/cr900183p] [Citation(s) in RCA: 377] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jana Roithová
- Department of Organic Chemistry, Charles University in Prague, Faculty of Sciences, Hlavova 8, 12843 Prague 2, Czech Republic.
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Chiavarino B, Crestoni ME, Fornarini S, Lanucara F. Probing bare high-valent transition oxo-metal complexes: an electrospray ionization Fourier transform ion cyclotron resonance study of reactive intermediates. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2010; 16:407-414. [PMID: 20530825 DOI: 10.1255/ejms.1042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Functional models of the Compound I intermediate of monooxygenase heme enzymes, namely [(TPFPP)(*+)Fe(IV)=O](+) and [(TPFPP)Mn(V)=O](+) (TPFPP = meso-tetrakis (pentafluorophenyl)porphyrinato dianion), are obtained as bare species by electrospray ionization from solutions of appropriate precursors and their reactivity is investigated in the gas-phase. By an alternative approach involving the reaction of a gaseous oxidant, the naked core of Compound I, [(PP-IX)(*+)Fe(IV)=O](+) (PP-IX = protoporphyrin IX dianion) has been produced as well. This achievement, unprecedented in studies run in solution, is now made possible working in the gas-phase. The long lifetime ensured by the dilute gas-phase allows to reveal both structural details and elementary steps of the catalytic activity of these high-valent oxo-metal intermediates. Depending on the features of the oxo-metal complex, ionic products are formed with neutral substrates involving: (i) addition, (ii) oxygen atom transfer, (iii) formal hydride transfer. In contrast, ionic products indicative of a net initial hydrogen atom transfer event are never observed. The reaction pathways of these ultimate catalytic intermediates void of any trans axial ligand, counterion, solvent or protein environment are thus elucidated.
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Affiliation(s)
- Barbara Chiavarino
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma La Sapienza, Piazzale A. Moro 5, Roma, Italy
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Intrinsic Mechanisms of Oxidation Reactions as Revealed by Gas-Phase Experiments. TOP ORGANOMETAL CHEM 2006. [DOI: 10.1007/3418_056] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Crestoni ME, Fornarini S. Probing the Cytochrome P450-like Reactivity of High-Valent Oxo Iron Intermediates in the Gas Phase. Inorg Chem 2005; 44:5379-87. [PMID: 16022536 DOI: 10.1021/ic048595c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrospray ionization in combination with Fourier transform ion cyclotron resonance spectrometry is used to prepare and characterize at a molecular level high-valent oxoiron intermediates formed in the reaction of [(TPFPP)Fe(III)]Cl (TPFPP= meso-tetrakis(pentafluorophenyl)porphinato dianion) (1-Cl) with H(2)O(2) in methanol. The intrinsic reactivity in the gas phase of the iron(IV) oxo porphyrin cation radical complex, [(TPFPP)(.+)Fe(IV)=O](+), has been probed toward selected substrates (S), chosen among naturally occurring and model compounds. Whereas CO and cyclohexane proved to be unreactive, olefins, sulfides, amines, and phosphites all undergo oxygen atom transfer in the gas phase yielding the reduction product 1 and/or an adduct ion ([1-S](+)). The reaction efficiencies show a qualitative correlation with the oxophilic character of the active site of S. A notable exception is nitric oxide, which displays a remarkably high reactivity, in line with the important role of NO reactions with iron porphyrin complexes. Furthermore, subsidiary information on the neat association reaction of 1 with selected ligands (L) has been obtained by a kinetic study showing that both the efficiency and the extent of ligation toward the naked ion 1 depend on the electron-donating ability of L.
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Affiliation(s)
- M Elisa Crestoni
- Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma "La Sapienza", P.le A. Moro 5, I-00185 Roma, Italy.
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Schröder D, Wesendrup R, Schalley CA, Zummack W, Schwarz H. Gas-Phase Reactions of Aliphatic Alcohols with ‘Bare’ FeO+. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19960790113] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Shaik S, Danovich D, Fiedler A, Schröder D, Schwarz H. Two-State Reactivity in Organometallic Gas-Phase Ion Chemistry. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19950780602] [Citation(s) in RCA: 277] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Schröder D, Holthausen MC, Schwarz H. Radical-Like Activation of Alkanes by the Ligated Copper Oxide Cation (Phenanthroline)CuO+. J Phys Chem B 2004. [DOI: 10.1021/jp0496452] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Detlef Schröder
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., D-35032 Marburg, Germany
| | - Max C. Holthausen
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., D-35032 Marburg, Germany
| | - Helmut Schwarz
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., D-35032 Marburg, Germany
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Brönstrup M, Trage C, Schröder D, Schwarz H. Regioselective Activation of Ipso and Ortho Positions in Chlorobenzene by FeO+. J Am Chem Soc 2000. [DOI: 10.1021/ja993232a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mark Brönstrup
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
| | - Claudia Trage
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
| | - Detlef Schröder
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
| | - Helmut Schwarz
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
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Brönstrup M, Schröder D, Schwarz H. Oxidative dealkylation of aromatic amines by "bare" FeO+ in the gas phase. CAN J CHEM 1999. [DOI: 10.1139/v99-065] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The gas-phase oxidations of aniline, N-methylaniline, and N,N-dimethylaniline by FeO+ cation are examined by using mass spectrometric techniques. Although bare FeO+ is capable of hydroxylating aromatic CH bonds, the fate of the oxidation of arylamines is determined by docking of the FeO+ unit at nitrogen. The major reactions of the metastable aniline/FeO+ complex are losses of molecular hydrogen, ammonia, and water, all involving at least one N-H proton. N-alkylation results in a complete shift of the course of the reaction. The unimolecular processes observed can be regarded as initial steps of an oxidative dealkylation of the amines mediated by FeO+. More detailed mechanistic insight is obtained by examining the CH(D) bond activation of N-methyl-N-([D3]-methyl)aniline by bare and ligated FeO+ species. The gas-phase reactions of FeO+ with methylanilines show some similarities to the enzymatic dealkylation of amines by cytochrome P-450. The kinetic isotope effects observed experimentally suggest an electron transfer mechanism for the gas-phase reaction.Key words: mass spectrometry, gas-phase chemistry, iron, dealkylation, N,N-dimethylaniline.
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Capron L, Mestdagh H, Rolando C. Gas-phase reactivity of ionic iron complexes: comparison with solution chemistry. Coord Chem Rev 1998. [DOI: 10.1016/s0010-8545(98)00178-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Schwarz J, Wesendrup R, Schröder D, Schwarz H. Mass Spectrometric Study of [Fe,C3,H6,O]+ Isomers Relevant in the Gas-phase Oxidation of Hydrocarbons by “Bare” FeO+. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/cber.19961291211] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fiedler A, Kretzschmar I, Schröder D, Schwarz H. Chromium Dioxide Cation OCrO+ in the Gas Phase: Structure, Electronic States, and the Reactivity with Hydrogen and Hydrocarbons1. J Am Chem Soc 1996. [DOI: 10.1021/ja960157k] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Fiedler
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
| | - Ilona Kretzschmar
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
| | - Detlef Schröder
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
| | - Helmut Schwarz
- Contribution from the Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17, Juni 135, D-10623 Berlin, Germany
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Schalley CA, Wesendrup R, Schröder D, Schwarz H. Gas-Phase Chemistry of Hydrogen Peroxide and Alkyl Hydroperoxides with “Bare” First-Row Transition-Metal Cations Cr+−Co+. Generation of MO+ Cations Using H2O2 as Oxidant. Organometallics 1996. [DOI: 10.1021/om950573y] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christoph A. Schalley
- Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Ralf Wesendrup
- Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Detlef Schröder
- Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Helmut Schwarz
- Institut für Organische Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
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Reactions of Fe+ coordinated to the π-donating ligands C2H4, c-C5H5, C6H6 and C60 with N2O and CO: probing the bonding in (C60)Fe+. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0168-1176(95)04287-u] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Schröder D, Schwarz H. Aktivierung von CH- und CC-Bindungen durch „nackte” Übergangsmetalloxid-Kationen in der Gasphase. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951071805] [Citation(s) in RCA: 126] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Raabe N, Karraß S, Schwarz H. Ligand-Induced Directionality Shift in the Fe+-Mediated Dehydrogenation of 1,8-Diphenyloctane. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/cber.19951280620] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Stöckigt D, Schwarz H. Catalytic gas-phase oxidation of olefins mediated by Fe(C6H6)+ and a comparison of Fe(L)+ complexes (L = benzene, pyridine, naphthalene). ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.199519950253] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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