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Paul M, Thomulka T, Harnying W, Neudörfl JM, Adams CR, Martens J, Berden G, Oomens J, Meijer AJHM, Berkessel A, Schäfer M. Hydrogen Bonding Shuts Down Tunneling in Hydroxycarbenes: A Gas-Phase Study by Tandem-Mass Spectrometry, Infrared Ion Spectroscopy, and Theory. J Am Chem Soc 2023. [PMID: 37235775 DOI: 10.1021/jacs.3c01698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Hydroxycarbenes can be generated and structurally characterized in the gas phase by collision-induced decarboxylation of α-keto carboxylic acids, followed by infrared ion spectroscopy. Using this approach, we have shown earlier that quantum-mechanical hydrogen tunneling (QMHT) accounts for the isomerization of a charge-tagged phenylhydroxycarbene to the corresponding aldehyde in the gas phase and above room temperature. Herein, we report the results of our current study on aliphatic trialkylammonio-tagged systems. Quite unexpectedly, the flexible 3-(trimethylammonio)propylhydroxycarbene turned out to be stable─no H-shift to either aldehyde or enol occurred. As supported by density functional theory calculations, this novel QMHT inhibition is due to intramolecular H-bonding of a mildly acidic α-ammonio C-H bonds to the hydroxyl carbene's C-atom (C:···H-C). To further support this hypothesis, (4-quinuclidinyl)hydroxycarbenes were synthesized, whose rigid structure prevents this intramolecular H-bonding. The latter hydroxycarbenes underwent "regular" QMHT to the aldehyde at rates comparable to, e.g., methylhydroxycarbene studied by Schreiner et al. While QMHT has been shown for a number of biological H-shift processes, its inhibition by H-bonding disclosed here may serve for the stabilization of highly reactive intermediates such as carbenes, even as a mechanism for biasing intrinsic selectivity patterns.
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Affiliation(s)
- Mathias Paul
- Department of Chemistry, Organic Chemistry, University of Cologne, Greinstraße 4, Cologne 50939, Germany
| | - Thomas Thomulka
- Department of Chemistry, Organic Chemistry, University of Cologne, Greinstraße 4, Cologne 50939, Germany
| | - Wacharee Harnying
- Department of Chemistry, Organic Chemistry, University of Cologne, Greinstraße 4, Cologne 50939, Germany
| | - Jörg-Martin Neudörfl
- Department of Chemistry, Organic Chemistry, University of Cologne, Greinstraße 4, Cologne 50939, Germany
| | - Charlie R Adams
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Jonathan Martens
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Giel Berden
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Jos Oomens
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, Amsterdam 1098 XH, The Netherlands
| | | | - Albrecht Berkessel
- Department of Chemistry, Organic Chemistry, University of Cologne, Greinstraße 4, Cologne 50939, Germany
| | - Mathias Schäfer
- Department of Chemistry, Organic Chemistry, University of Cologne, Greinstraße 4, Cologne 50939, Germany
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Nikolaeva N, Kuratieva N, Vikulova E, Stabnikov P, Morozova N. Volatile asymmetric fluorinated (O^N)-chelated palladium complexes: From ligand sources to MOCVD application. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.07.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Paul M, Peckelsen K, Thomulka T, Neudörfl J, Martens J, Berden G, Oomens J, Berkessel A, Meijer AJHM, Schäfer M. Hydrogen tunneling avoided: enol-formation from a charge-tagged phenyl pyruvic acid derivative evidenced by tandem-MS, IR ion spectroscopy and theory. Phys Chem Chem Phys 2019; 21:16591-16600. [PMID: 31317140 DOI: 10.1039/c9cp02316j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A charge-tagged phenyl pyruvic acid derivative was investigated by tandem-MS, infrared (IR) ion spectroscopy and theory. The tailor-made precursor ions efficiently lose CO2 in collision induced dissociation (CID) experiments, offering access to study the secondary decay reactions of the product ions. IR ion spectroscopy provides evidence for the formation of an enol acid precursor ion structure in the gas phase and indicates the presence of enol products formed after CO2 loss. Extensive DFT computations however, suggest intermediate generation of hydroxycarbene products, which in turn rearrange in a secondary process to the enol ions detected by IR ion spectroscopy. Quantum mechanical tunneling of the hydroxycarbene can be excluded since no evidence for aldehyde product ion formation could be found. This finding is in contrast to the behavior of methylhydroxycarbene, which cleanly penetrates the energy barrier to form exclusively acetaldehyde at cryogenic temperatures in an argon matrix via quantum mechanical hydrogen tunneling. The results presented here are attributed to the highly excited energy levels of the product ions formed by CID in combination with different barrier heights of the competing reaction channels, which allow exclusive access over one energy barrier leading to the formation of the enol tautomer ions observed.
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Affiliation(s)
- Mathias Paul
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | - Katrin Peckelsen
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | - Thomas Thomulka
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | - Jörg Neudörfl
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | - Jonathan Martens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands and Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Albrecht Berkessel
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | | | - Mathias Schäfer
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
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Czympiel L, Frank M, Mettenbörger A, Hühne SM, Mathur S. High activity heterogeneous catalysts by plasma-enhanced chemical vapor deposition of volatile palladium complexes on biomorphic carbon. CR CHIM 2018. [DOI: 10.1016/j.crci.2018.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Czympiel L, Lekeu JM, Hegemann C, Mathur S. Oxidative halogenation of Sn(II)heteroaryl alkenolates: Formation of unusual trans -dihalo Sn(IV) complexes. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Peckelsen K, Martens J, Czympiel L, Oomens J, Berden G, Gründemann D, Meijer AJHM, Schäfer M. Ergothioneine and related histidine derivatives in the gas phase: tautomer structures determined by IRMPD spectroscopy and theory. Phys Chem Chem Phys 2017; 19:23362-23372. [DOI: 10.1039/c7cp03843g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gas-phase analysis of ergothioneine molecular ions allows differentiating thiol from thione tautomer structures.
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Affiliation(s)
- Katrin Peckelsen
- Department für Chemie
- Institut für Organische Chemie
- Universität zu Köln
- Greinstrasse 4
- Köln
| | - Jonathan Martens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- Toernooiveld 7c
- Nijmegen
| | - Lisa Czympiel
- Department für Chemie
- Institut für Organische Chemie
- Universität zu Köln
- Greinstrasse 4
- Köln
| | - Jos Oomens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- Toernooiveld 7c
- Nijmegen
| | - Giel Berden
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- Toernooiveld 7c
- Nijmegen
| | - Dirk Gründemann
- Department of Pharmacology
- University of Cologne
- Gleueler Straße 24
- Cologne
- Germany
| | | | - Mathias Schäfer
- Department für Chemie
- Institut für Organische Chemie
- Universität zu Köln
- Greinstrasse 4
- Köln
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Appel L, Leduc J, Webster CL, Ziller JW, Evans WJ, Mathur S. Synthesis of Air-Stable, Volatile Uranium(IV) and (VI) Compounds and Their Gas-Phase Conversion To Uranium Oxide Films. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409606] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Appel L, Leduc J, Webster CL, Ziller JW, Evans WJ, Mathur S. Synthesis of Air-Stable, Volatile Uranium(IV) and (VI) Compounds and Their Gas-Phase Conversion To Uranium Oxide Films. Angew Chem Int Ed Engl 2014; 54:2209-13. [DOI: 10.1002/anie.201409606] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Indexed: 01/08/2023]
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Czympiel L, Pfrommer J, Tyrra W, Schäfer M, Mathur S. Ligand-Modulated Chemical and Structural Implications in Four-, Five-, and Six-fold Coordinated Aluminum Heteroaryl Alkenolates. Inorg Chem 2014; 54:25-37. [DOI: 10.1021/ic502549m] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lisa Czympiel
- Department of Chemistry, Institute of Inorganic Chemistry and ‡Department of
Chemistry, Institute of Organic Chemistry, University of Cologne, 50939 Cologne, Germany
| | - Johannes Pfrommer
- Department of Chemistry, Institute of Inorganic Chemistry and ‡Department of
Chemistry, Institute of Organic Chemistry, University of Cologne, 50939 Cologne, Germany
| | - Wieland Tyrra
- Department of Chemistry, Institute of Inorganic Chemistry and ‡Department of
Chemistry, Institute of Organic Chemistry, University of Cologne, 50939 Cologne, Germany
| | - Mathias Schäfer
- Department of Chemistry, Institute of Inorganic Chemistry and ‡Department of
Chemistry, Institute of Organic Chemistry, University of Cologne, 50939 Cologne, Germany
| | - Sanjay Mathur
- Department of Chemistry, Institute of Inorganic Chemistry and ‡Department of
Chemistry, Institute of Organic Chemistry, University of Cologne, 50939 Cologne, Germany
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van Stipdonk MJ, Basu P, Dille SA, Gibson JK, Berden G, Oomens J. Infrared multiple photon dissociation spectroscopy of a gas-phase oxo-molybdenum complex with 1,2-dithiolene ligands. J Phys Chem A 2014; 118:5407-18. [PMID: 24988369 PMCID: PMC4338922 DOI: 10.1021/jp503222v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
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Electrospray
ionization (ESI) in the negative ion mode was used
to create anionic, gas-phase oxo-molybdenum complexes with dithiolene
ligands. By varying ESI and ion transfer conditions, both doubly and
singly charged forms of the complex, with identical formulas, could
be observed. Collision-induced dissociation (CID) of the dianion generated
exclusively the monoanion, while fragmentation of the monoanion involved
decomposition of the dithiolene ligands. The intrinsic structure of
the monoanion and the dianion were determined by using wavelength-selective
infrared multiple-photon dissociation (IRMPD) spectroscopy and density
functional theory calculations. The IRMPD spectrum for the dianion
exhibits absorptions that can be assigned to (ligand) C=C,
C–S, C—C≡N, and Mo=O stretches. Comparison
of the IRMPD spectrum to spectra predicted for various possible conformations
allows assignment of a pseudo square pyramidal structure with C2v symmetry, equatorial coordination
of MoO2+ by the S atoms of the dithiolene ligands, and
a singlet spin state. A single absorption was observed for the oxidized
complex. When the same scaling factor employed for the dianion is
used for the oxidized version, theoretical spectra suggest that the
absorption is the Mo=O stretch for a distorted square pyramidal
structure and doublet spin state. A predicted change in conformation
upon oxidation of the dianion is consistent with a proposed bonding
scheme for the bent-metallocene dithiolene compounds [Lauher, J. W.; Hoffmann, R. 1976, 98, 1729−1742], where a large
folding of the dithiolene moiety along the S···S vector
is dependent on the occupancy of the in-plane metal d-orbital.
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Affiliation(s)
- Michael J van Stipdonk
- Department of Chemistry and Biochemistry, Duquesne University , 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
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