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Armenta Butt S, Price SD. Bimolecular reactions of CH 2CN 2+ with Ar, N 2 and CO: reactivity and dynamics. Phys Chem Chem Phys 2022; 24:15824-15839. [PMID: 35758308 DOI: 10.1039/d2cp01523d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity, energetics and dynamics of bimolecular reactions between CH2CN2+ and three neutral species (Ar, N2 and CO) have been studied using a position sensitive coincidence methodology at centre-of-mass collision energies of 4.3-5.0 eV. This is the first study of bimolecular reactions involving CH2CN2+, a species relevant to the ionospheres of planets and satellites, including Titan. All of the collision systems investigated display two collision-induced dissociation (CID) channels, resulting in the formation of C+ + CH2N+ and H+ + HC2N+. Evidence for channels involving further dissociation of the CID product HC2N+, forming H + CCN+, were detected in the N2 and CO systems. Proton-transfer from the dication to the neutral species occurs in all three of the systems via a direct mechanism. Additionally, there are product channels resulting from single electron transfer following collisions of CH2CN2+ with both N2 and CO, but interestingly no electron transfer following collisions with Ar. Electronic structure calculations of the lowest energy electronic states of CH2CN2+ reveal six local geometric minima: both doublet and quartet spin states for cyclic, linear (CH2CN), and linear isocyanide (CH2NC) molecular geometries. The lowest energy electronic state was determined to be the doublet state of the cyclic dication. The ready generation of C+ ions by collision-induced dissociation suggests that the cyclic or linear isocyanide dication geometries are present in the [CH2CN]2+ beam.
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Affiliation(s)
- Sam Armenta Butt
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Stephen D Price
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
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Armenta Butt S, Price SD. Bimolecular reactions of S 2+ with Ar, H 2 and N 2: reactivity and dynamics. Phys Chem Chem Phys 2022; 24:8113-8128. [PMID: 35322816 DOI: 10.1039/d1cp05397c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity, energetics and dynamics of bimolecular reactions between S2+ and three neutral species (Ar, H2 and N2) have been studied using a position-sensitive coincidence methodology at centre-of-mass collision energies below 6 eV. This is the first study of bimolecular reactions involving S2+, a species detected in planetary ionospheres, the interstellar medium, and in anthropogenic manufacturing processes. The reactant dication beam employed consists predominantly of S2+ in the ground 3P state, but some excited states are also present. Most of the observed reactions involve the ground state of S2+, but the dissociative electron transfer reactions appear to exclusively involve excited states of this atomic dication. We observe exclusively single electron-transfer between S2+ and Ar, a process which exhibits strong forward scatting typical of the Landau-Zener style dynamics observed for other dicationic electron transfer reactions. Following collisions between S2+ + H2, non-dissociative and dissociative single electron-transfer reactions were detected. The dynamics here show evidence for the formation of a long-lived collision complex, [SH2]2+, in the dissociative single electron-transfer channel. The formation of SH+ was not observed. In contrast, the collisions of S2+ + N2 result in the formation of SN+ + N+ in addition to the products of single electron-transfer reactions.
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Affiliation(s)
- Sam Armenta Butt
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Stephen D Price
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
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Derbali I, Thissen R, Alcaraz C, Romanzin C, Zins EL. Study of the Reactivity of CH 3COOH +• and COOH + Ions with CH 3NH 2: Evidence of the Formation of New Peptide-like C(O)-N Bonds. J Phys Chem A 2021; 125:10006-10020. [PMID: 34761946 DOI: 10.1021/acs.jpca.1c06630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acetamide, a small organic compound containing a peptide bond, was observed in the interstellar medium, but reaction pathways leading to the formation of this prebiotic molecule remain uncertain. We investigated the possible formation of a peptide-like bond from the reaction between acetic acid (CH3-COOH) and methylamine (CH3-NH2) that were identified in the interstellar medium. From an experimental point of view, a quadrupole/octopole/quadrupole mass spectrometer was used in combination with synchrotron radiation as a tunable source of VUV photons for monitoring the reactivity of selected ions. Acetic acid was photoionized, and the reactivity of CH3COOH+• as well as COOH+ (produced from either acetic acid or formic acid) ions with neutral CH3NH2 was further studied. With no surprise, charge transfer, proton transfer, and concomitant dissociation processes were found to largely dominate the reactivity. However, a C(O)-N bond formation process between the two reactants was also evidenced, with a weak cross section reaction. From a theoretical point of view, results concerning reactivity and barrier heights were obtained using density functional theory, with the LC-ωPBE range-separated functional in combination with the 6-311++G(d,p) Pople basis set and are in perfect agreement with the experimental data.
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Affiliation(s)
- Imene Derbali
- De la Molécule aux Nano-Objets: Réactivité, Interactions Spectroscopies, MONARIS, Sorbonne Université, CNRS, 75005 Paris, France
| | - Roland Thissen
- Institut de Chimie Physique, UMR 8000, Université Paris-Saclay, CNRS, Bât. 350, 91405 Orsay, France.,SOLEIL Synchrotron, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - Christian Alcaraz
- Institut de Chimie Physique, UMR 8000, Université Paris-Saclay, CNRS, Bât. 350, 91405 Orsay, France.,SOLEIL Synchrotron, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - Claire Romanzin
- Institut de Chimie Physique, UMR 8000, Université Paris-Saclay, CNRS, Bât. 350, 91405 Orsay, France.,SOLEIL Synchrotron, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - Emilie-Laure Zins
- De la Molécule aux Nano-Objets: Réactivité, Interactions Spectroscopies, MONARIS, Sorbonne Université, CNRS, 75005 Paris, France
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Armenta Butt S, Price SD. Bond-forming and electron-transfer reactivity between Ar 2+ and N 2. Phys Chem Chem Phys 2021; 23:11287-11299. [PMID: 33954331 DOI: 10.1039/d1cp00918d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Collisions between Ar2+ and N2 have been studied using a coincidence technique at a centre-of-mass (CM) collision energy of 5.1 eV. Four reaction channels generating pairs of monocations are observed: Ar+ + N2+, Ar+ + N+, ArN+ + N+ and N+ + N+. The formation of Ar+ + N2+ is the most intense channel, displaying forward scattering but with a marked tail to higher scattering angles. This scattering, and other dynamics data, is indicative of direct electron transfer competing with a 'sticky' collision between the Ar2+ and N2 reactants. Here Ar+ is generated in its ground (2P) state and N2+ is primarily in the low vibrational levels of the C2Σu+ state. A minor channel involving the initial population of higher energy N2+ states, lying above the dissociation asymptote to N+ + N, which fluoresce to stable states of N2+ is also identified. The formation of Ar+ + N+ by dissociative single electron transfer again reveals the involvement of two different pathways for the initial electron transfer (direct or complexation). This reaction pathway predominantly involves excited states of Ar2+ (1D and 1S) populating N2+* in its dissociative C2Σu+, 22Πg and D2Πg states. Formation of ArN+ + N+ proceeds via a direct mechanism. The ArN+ is formed, with significant vibrational excitation, in its ground (X3Σ-) state. Formation of N+ + N+ is also observed as a consequence of double electron transfer forming N22+. The exoergicity of the subsequent N22+ dissociation reveals the population of the A1Πu and D3Πg dication states.
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Affiliation(s)
- Sam Armenta Butt
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Stephen D Price
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
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Armenta Butt S, Price SD. Bond-forming and electron-transfer reactivity between Ar2+ and O2. Phys Chem Chem Phys 2020; 22:8391-8400. [DOI: 10.1039/d0cp01194k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity, energetics and dynamics of the bimolecular reactions between Ar2+ and O2 have been studied using a position sensitive coincidence methodology at a collision energy of 4.4 eV.
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Shaffer CJ, Schröder D, Alcaraz C, Žabka J, Zins EL. Reactions of Doubly Ionized Benzene with Nitrogen and Water: A Nitrogen-Mediated Entry into Superacid Chemistry. Chemphyschem 2012; 13:2688-98. [DOI: 10.1002/cphc.201200313] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Indexed: 11/10/2022]
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Unimolecular dissociation of doubly ionized toluene and electron transfer between neutral toluene and its dication. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.03.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Schröder D. Energy partitioning in single-electron transfer events between gaseous dications and their neutral counterparts. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2012; 18:139-148. [PMID: 22641725 DOI: 10.1255/ejms.1161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Electron-transfer reactions between hydrocarbon dications and neutral hydrocarbons lead to an unequal deposition of the excess energy from the reaction in the pair of monocations formed. The initial observation of this phenomenon was explained by the different states accessible upon single-electron capture by a dication compared to single-electron ejection from a neutral compound. Alternatively, however, isomeric structures of the dicationic species, pronounced Franck-Condon effects, as well as excess energy in the dicationic precursors could cause the asymmetric energy partitioning in such dication/neutral collisions. Here, the investigation of this phenomenon in an interdisciplinary cooperation is described, shedding light not only upon a possible solution of the problem at hand, but also providing an example for the synergistic benefits of international research networks applying complementary approaches.
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Affiliation(s)
- Detlef Schröder
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic.
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Parkes MA, Lockyear JF, Schröder D, Roithová J, Price SD. Electronic state selectivity in dication-molecule single electron transfer reactions: NO(2+) + NO. Phys Chem Chem Phys 2011; 13:18386-92. [PMID: 21842050 DOI: 10.1039/c1cp21612k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The single-electron transfer reaction between NO(2+) and NO, which initially forms a pair of NO(+) ions, has been studied using a position-sensitive coincidence technique. The reactivity in this class of collision system, which involves the interaction of a dication with its neutral precursor, provides a sensitive test of recent ideas concerning electronic state selectivity in dicationic single-electron transfer reactions. In stark contrast to the recently observed single-electron transfer reactivity in the analogous CO(2)(2+)/CO(2) and O(2)(2+)/O(2) collision systems, electron transfer between NO(2+) and NO generates two product NO(+) ions which behave in an identical manner, whether the ions are formed from NO(2+) or NO. This observed behaviour is in excellent accord with the recently proposed rationalization of the state selectivity in dication-molecule SET reactions using simple propensity rules involving one-electron transitions.
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Affiliation(s)
- Michael A Parkes
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
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Thissen R, Witasse O, Dutuit O, Wedlund CS, Gronoff G, Lilensten J. Doubly-charged ions in the planetary ionospheres: a review. Phys Chem Chem Phys 2011; 13:18264-87. [PMID: 21931881 DOI: 10.1039/c1cp21957j] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This paper presents a review of the current knowledge on the doubly-charged atomic and molecular positive ions in the planetary atmospheres of the Solar System. It is focused on the terrestrial planets which have a dense atmosphere of N(2) or CO(2), i.e. Venus, the Earth and Mars, but also includes Titan, the largest satellite of Saturn, which has a dense atmosphere composed mainly of N(2) and a few percent of methane. Given the composition of these neutral atmospheres, the following species are considered: C(++), N(++), O(++), CH(4)(++), CO(++), N(2)(++), NO(++), O(2)(++), Ar(++) and CO(2)(++). We first discuss the status of their detection in the atmospheres of planets. Then, we provide a comprehensive review of their complex and original photochemistry, production and loss processes. Synthesis tables are provided for those ions, while a discussion on individual species is also provided. Methods for detecting doubly-charged ions in planetary atmospheres are presented, namely with mass-spectrometry, remote sensing and fine plasma density measurements. A section covers some original applications, like the possible effect of the presence of doubly-charged ions on the escape of an atmosphere, which is a key topic of ongoing planetary exploration, related to the evolution of a planet. The results of models, displayed in a comparative way for Venus, Earth, Mars and Titan, are discussed, as they can predict the presence of doubly-charged ions and will certainly trigger new investigations. Finally we give our view concerning next steps, challenges and needs for future studies, hoping that new scientific results will be achieved in the coming years and feed the necessary interdisciplinary exchanges amongst different scientific communities.
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Affiliation(s)
- Roland Thissen
- Institut de Planétologie et d'Astrophysique de Grenoble, UJF-Grenoble 1/CNRS-INSU, UMR 5274, Grenoble, F-38041, France.
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Schröder D. Ion-mobility mass spectrometry of complexes of nickel and acetonitrile. ACTA ACUST UNITED AC 2011. [DOI: 10.1135/cccc2011020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Mono- and dications of microsolvated nickel complexes of acetonitrile are probed by means of ion-mobility mass spectrometry. Specifically, the complexes [(CH3CN)nNi]+, [(CH3CN)nNi]2+, [(CH3CN)nNiOH]+, and [(CH3CN)nNiCl]+ (n = 0–6) are compared to each other and their reactions with background water are probed. In general, the arrival times of the ions in the ion-mobility experiment linearly increase with the mass-to-charge ratio, but for the smaller, more reactive complexes, the arrival times are notably larger than expected from their mass. This effect is attributed to the markedly larger reactivity of these particular ions, as reflected in both charge-separation processes as well as adduct formation upon interaction with background water.
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Zins EL, Milko P, Schröder D, Aysina J, Ascenzi D, Žabka J, Alcaraz C, Price SD, Roithová J. Formation of Organoxenon Dications in the Reactions of Xenon with Dications Derived from Toluene. Chemistry 2011; 17:4012-20. [DOI: 10.1002/chem.201002556] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Indexed: 11/11/2022]
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Kretschmer R, Zhang X, Schlangen M, Schwarz H. Thermal Activation of NH Bonds by Transition-metal Oxide Cations: Does a Hierarchy Exist in the First Row? Chemistry 2011; 17:3886-92. [DOI: 10.1002/chem.201003620] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Indexed: 11/09/2022]
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14
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Ascenzi D, Aysina J, Zins EL, Schröder D, Žabka J, Alcaraz C, Price SD, Roithová J. Double ionization of cycloheptatriene and the reactions of the resulting C7Hn2+ dications (n = 6, 8) with xenon. Phys Chem Chem Phys 2011; 13:18330-8. [DOI: 10.1039/c1cp21634a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Tsierkezos NG, Ritter U, Philippopoulos AI, Schröder D. Electrochemical studies of the bis (triphenyl phosphine) ruthenium(II) complex, cis -[RuCl2(L)(PPh3)2], with L = 2-(2′-pyridyl)quinoxaline. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.516362] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nikos G. Tsierkezos
- a Institut für Chemie, Elektrochemie und Galvanotechnik, Fachgebiet Chemie, Technische Universität Ilmenau , Weimarer Straße 25, 98693 Ilmenau, Germany
| | - Uwe Ritter
- a Institut für Chemie, Elektrochemie und Galvanotechnik, Fachgebiet Chemie, Technische Universität Ilmenau , Weimarer Straße 25, 98693 Ilmenau, Germany
| | - Athanassios I. Philippopoulos
- b Laboratory of Inorganic Chemistry, Faculty of Chemistry, School of Science, National and Kapodistrian University of Athens , Panepistimiopolis Zografou 15771, Athens, Greece
| | - Detlef Schröder
- c Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic , Flemingovo náměsti 2, 166 10 Prague 6, Czech Republic
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Rezabal E, Ducháčková L, Milko P, Holthausen MC, Roithová J. Ligand Effects on the [Cu(PhO)(PhOH)]+ Redox Active Complex. Inorg Chem 2010; 49:8421-9. [DOI: 10.1021/ic100952q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Elixabete Rezabal
- Institut für Anorganische und Analytische Chemie, Johann Wolfgang Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt am Main, Germany
| | - Lucie Ducháčková
- Department of Organic and Nuclear Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 12840 Praha 2, Czech Republic
| | - Petr Milko
- Institute of Organic Chemistry and Biochemistry, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Max C. Holthausen
- Institut für Anorganische und Analytische Chemie, Johann Wolfgang Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt am Main, Germany
| | - Jana Roithová
- Department of Organic and Nuclear Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 12840 Praha 2, Czech Republic
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17
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Electrospray Mass Spectrometric Studies of Two Palladium−Allyl Complexes of the Trost Standard Ligand. Organometallics 2010. [DOI: 10.1021/om100591c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Feixas F, Ponec R, Fišer J, Roithová J, Schröder D, Price SD. Bonding Analysis of the [C2O4]2+ Intermediate Formed in the Reaction of CO22+ with Neutral CO2. J Phys Chem A 2010; 114:6681-8. [DOI: 10.1021/jp1020559] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ferran Feixas
- Institute of Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02, Prague 6, Suchdol 2, Czech Republic, Institute of Computational Chemistry and Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain, Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Department of Organic and Nuclear Chemistry, Faculty of Sciences, Charles University in Prague,
| | - Robert Ponec
- Institute of Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02, Prague 6, Suchdol 2, Czech Republic, Institute of Computational Chemistry and Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain, Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Department of Organic and Nuclear Chemistry, Faculty of Sciences, Charles University in Prague,
| | - Jiří Fišer
- Institute of Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02, Prague 6, Suchdol 2, Czech Republic, Institute of Computational Chemistry and Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain, Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Department of Organic and Nuclear Chemistry, Faculty of Sciences, Charles University in Prague,
| | - Jana Roithová
- Institute of Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02, Prague 6, Suchdol 2, Czech Republic, Institute of Computational Chemistry and Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain, Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Department of Organic and Nuclear Chemistry, Faculty of Sciences, Charles University in Prague,
| | - Detlef Schröder
- Institute of Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02, Prague 6, Suchdol 2, Czech Republic, Institute of Computational Chemistry and Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain, Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Department of Organic and Nuclear Chemistry, Faculty of Sciences, Charles University in Prague,
| | - Stephen D. Price
- Institute of Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02, Prague 6, Suchdol 2, Czech Republic, Institute of Computational Chemistry and Department of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain, Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Department of Organic and Nuclear Chemistry, Faculty of Sciences, Charles University in Prague,
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Žabka J, Ricketts CL, Schröder D, Roithová J, Schwarz H, Thissen R, Dutuit O, Price SD, Herman Z. Crossed-Beam Scattering Studies of Electron-Transfer Processes between the Dication CO22+ and Neutral CO2: Electronic States of Reactants and Products Involved. J Phys Chem A 2010; 114:6463-71. [DOI: 10.1021/jp1023795] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Žabka
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Claire L. Ricketts
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Detlef Schröder
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Jana Roithová
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Helmut Schwarz
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Roland Thissen
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Odile Dutuit
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Stephen D. Price
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
| | - Zdenek Herman
- V. Čermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Space Science Division, NASA Ames Research Center, Mail Stop 245-6, Moffett Field, California 94035, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague
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Zins EL, Schröder D. Carbon−Carbon Coupling Reactions of Medium-Sized Nitrogen-Containing Dications. J Phys Chem A 2010; 114:5989-96. [DOI: 10.1021/jp100852q] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Emilie-Laure Zins
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic
| | - Detlef Schröder
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic
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21
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Schröder D, Roithová J, Alikhani E, Kwapien K, Sauer J. Preferential Activation of Primary CH Bonds in the Reactions of Small Alkanes with the Diatomic MgO+. Cation. Chemistry 2010; 16:4110-9. [PMID: 20187038 DOI: 10.1002/chem.200902373] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Detlef Schröder
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo námestí 2, 16610 Prague 6, Czech Republic.
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22
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Parkes MA, Lockyear JF, Price SD, Schröder D, Roithová J, Herman Z. Selective dissociation in dication–molecule reactions. Phys Chem Chem Phys 2010; 12:6233-43. [DOI: 10.1039/b926049h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Milko P, Roithová J. Redox Processes in the Iron(III)/9,10-Phenanthraquinone System. Inorg Chem 2009; 48:11734-42. [PMID: 19928842 DOI: 10.1021/ic901789h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Petr Milko
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Praha 6, Czech Republic
| | - Jana Roithová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Praha 6, Czech Republic
- Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic
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Ascenzi D, Roithová J, Schröder D, Zins EL, Alcaraz C. Growth Of Doubly Ionized C,H,N Compounds in the Presence of Methane. J Phys Chem A 2009; 113:11204-10. [DOI: 10.1021/jp904859g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniela Ascenzi
- Department of Physics, University of Trento, Via Sommarive 14, 38050 Povo, Trento, Italy, Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic, Laboratoire de Dynamique, Interactions et Réactivité, UMR 7075 CNRS/UPMC, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris 5, France, Laboratoire de
| | - Jana Roithová
- Department of Physics, University of Trento, Via Sommarive 14, 38050 Povo, Trento, Italy, Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic, Laboratoire de Dynamique, Interactions et Réactivité, UMR 7075 CNRS/UPMC, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris 5, France, Laboratoire de
| | - Detlef Schröder
- Department of Physics, University of Trento, Via Sommarive 14, 38050 Povo, Trento, Italy, Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic, Laboratoire de Dynamique, Interactions et Réactivité, UMR 7075 CNRS/UPMC, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris 5, France, Laboratoire de
| | - Emilie-Laure Zins
- Department of Physics, University of Trento, Via Sommarive 14, 38050 Povo, Trento, Italy, Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic, Laboratoire de Dynamique, Interactions et Réactivité, UMR 7075 CNRS/UPMC, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris 5, France, Laboratoire de
| | - Christian Alcaraz
- Department of Physics, University of Trento, Via Sommarive 14, 38050 Povo, Trento, Italy, Department of Organic Chemistry, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610 Prague 6, Czech Republic, Laboratoire de Dynamique, Interactions et Réactivité, UMR 7075 CNRS/UPMC, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris 5, France, Laboratoire de
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28
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Žabka J, Polášek M, Ascenzi D, Tosi P, Roithová J, Schröder D. Reactivity of C2H5+ with Benzene: Formation of Ethylbenzenium Ions and Implications for Titan’s Ionospheric Chemistry. J Phys Chem A 2009; 113:11153-60. [DOI: 10.1021/jp905052h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jan Žabka
- J. Heyrovský Institute of Physical Chemistry, V. Čermák Laboratory, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, and Department of Physics, University of Trento, Via Sommarive 14 38100 Povo,
| | - Miroslav Polášek
- J. Heyrovský Institute of Physical Chemistry, V. Čermák Laboratory, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, and Department of Physics, University of Trento, Via Sommarive 14 38100 Povo,
| | - Daniela Ascenzi
- J. Heyrovský Institute of Physical Chemistry, V. Čermák Laboratory, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, and Department of Physics, University of Trento, Via Sommarive 14 38100 Povo,
| | - Paolo Tosi
- J. Heyrovský Institute of Physical Chemistry, V. Čermák Laboratory, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, and Department of Physics, University of Trento, Via Sommarive 14 38100 Povo,
| | - Jana Roithová
- J. Heyrovský Institute of Physical Chemistry, V. Čermák Laboratory, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, and Department of Physics, University of Trento, Via Sommarive 14 38100 Povo,
| | - Detlef Schröder
- J. Heyrovský Institute of Physical Chemistry, V. Čermák Laboratory, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic, Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12083 Prague 2, Czech Republic, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic, and Department of Physics, University of Trento, Via Sommarive 14 38100 Povo,
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Tsierkezos NG, Buchta M, Holý P, Schröder D. Complexation of late transition metal(II) ions (M = Co, Ni, Cu, and Zn) by a macrocyclic thiacrown ether studied by means of electrospray ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2009; 23:1550-1556. [PMID: 19399766 DOI: 10.1002/rcm.4035] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Electrospray ionization mass spectrometry (ESI-MS) is used to probe the metal-binding selectivity of a macrocyclic thiacrown ether (C(44)H(32)S(20)) towards Co(II), Ni(II), Cu(II), and Zn(II). In homogeneous 1:1 v/v methanol/dichloromethane solutions, it is found that the thia ligand very selectively binds traces of copper even in the presence of an excess of the other metal ions. The large selectivity is ascribed to the redox-active nature of copper which enables a reduction from Cu(II) to Cu(I), occurring upon ESI-MS, whereas Co(II), Ni(II) and Zn(II) cannot undergo similar redox reactions.
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Affiliation(s)
- Nikos G Tsierkezos
- Institut für Physik, Fachgebiet Chemie, Technische Universität Ilmenau, Weimarer Str. 25, 98693 Ilmenau, Germany
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Míšek J, Tichý M, Stará IG, Starý I, Schröder D. Preferential formation of homochiral silver(I) complexes upon coordination of two aza[6]helicene ligands to Ag+ ions. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2008184] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
By means of selective deuterium labeling of 1-aza[6]helicene combined with resolution of the enantiomers, chiral discrimination in silver(I)-bound dimers of the type [LAgL′]+ is probed by electrospray mass spectrometry. The analysis of the results reveals a pronounced preference for the formation of homochiral dimers (P,P and M,M, respectively) over the statistically preferred heterochiral variant (P,M), which is fully consistent with previous data about the formation of homochiral dimers in the condensed phase. Further, competitive experiments with mixtures of 1- and 2-aza[6]helicene suggest a largely preferred coordination of 1-aza[6]helicene to the silver(I) cation.
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Milko P, Schröder D, Lemr K, Žabka J, Alcaraz C, Roithová J. First and second ionization energies of 1,3,5-trimethylbenzene and 2,4,6-trimethylpyridine. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2008166] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The first and second ionization energies of trimethyl substituted analogs of benzene and pyridine are determined by means of mass spectrometry in conjunction with synchrotron radiation. The first ionization energy of 1,3,5-trimethylbenzene amounts to (8.38 ± 0.05) eV and the second ionization energy to (22.8 ± 0.1) eV. The first ionization energy of 2,4,6-trimethylpyridine is determined as (8.65 ± 0.05) eV and the second ionization energy as (23.0 ± 0.1) eV. The ionization energies are compared with those of unsubstituted benzene and pyridine and the effects of the methyl groups are evaluated by means of isodesmic reactions. As expected, it is found that the electron-donating effect of the methyl groups stabilizes neutral pyridine and doubly charged pyridine more than neutral benzene and doubly charged benzene, respectively. Surprisingly, the opposite effect is found for the radical cations, which is ascribed to the unfavorable degenerate electronic structure of benzene radical-cation, which disappears upon the methyl substitution.
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Révész Á, Sztáray B, Schröder D, Franzreb K, Fišer J, Price SD, Roithová J. The diatomic dication PO2+. Phys Chem Chem Phys 2009; 11:6192-8. [DOI: 10.1039/b902843a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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33
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Feyel S, Schröder D, Schwarz H. Gas-Phase Chemistry of Vanadium Oxide Cluster Cations VmOn+(m= 1-4;n= 1-10) with Water and Molecular Oxygen. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800685] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Ricketts CL, Schröder D, Roithová J, Schwarz H, Thissen R, Dutuit O, Zabka J, Herman Z, Price SD. Competition of electron transfer, dissociation, and bond-forming processes in the reaction of the CO(2)(2+) dication with neutral CO(2). Phys Chem Chem Phys 2008; 10:5135-43. [PMID: 18701963 DOI: 10.1039/b800865e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The bimolecular reactivity of the CO(2)(2+) dication with neutral CO(2) is investigated using triple quadrupole and ion-ion coincidence mass spectrometry. Crucial for product analysis is the use of appropriate isotope labelling in the quadrupole experiments in order to distinguish the different reactive pathways. The main reaction corresponds to single-electron transfer from the neutral reagent to the dication, i.e. CO(2)(2+) + CO(2) --> 2CO(2)(+); this process is exothermic by almost 10 eV, if ground state monocations are formed. Interestingly, the results indicate that the CO(2)(+) ion formed when the dication accepts an electron dissociates far more readily than the CO(2)(+) ion formed from the neutral CO(2) molecule. This differentiation of the two CO(2)(+) products is rationalized by showing that the population of the key dissociative states of the CO(2)(+) monocation will be favoured from the CO(2)(2+) dication rather than from neutral CO(2). In addition, two bond-forming reactions are observed as minor channels, one of which leads to CO(+) and O(2)(+) as ionic products and the other affords a long-lived C(2)O(3)(2+) dication.
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Affiliation(s)
- Claire L Ricketts
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, Prague 6, Czech Republic
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35
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Schröder D. Gaseous Rust: Thermochemistry of Neutral and Ionic Iron Oxides and Hydroxides in the Gas Phase. J Phys Chem A 2008; 112:13215-24. [DOI: 10.1021/jp8030804] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Detlef Schröder
- Institute of Organic Chemistry and Biochemistry, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
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36
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Armélin M, Schlangen M, Schwarz H. On the Mechanisms of Degenerate Ligand Exchange in [M(CH3)]+/CH4 Couples (M=Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) as Explored by Mass Spectrometric and Computational Studies: Oxidative Addition/Reductive Elimination versus σ-Complex-Assisted Metathesis. Chemistry 2008; 14:5229-36. [DOI: 10.1002/chem.200800029] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Ricketts C, Schröder D, Alcaraz C, Roithová J. Growth of Larger Hydrocarbons in the Ionosphere of Titan. Chemistry 2008; 14:4779-83. [DOI: 10.1002/chem.200800524] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Milko P, Roithová J, Schröder D, Lemaire J, Schwarz H, Holthausen M. The Phenoxy/Phenol/Copper Cation: A Minimalistic Model of Bonding Relations in Active Centers of Mononuclear Copper Enzymes. Chemistry 2008; 14:4318-27. [DOI: 10.1002/chem.200800052] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Roithová J, Schröder D. Gas-Phase Study on the CC Coupling of Naphthol Catalyzed by CuII⋅TMEDA: Evidence for the Key Role of Binuclear Clusters. Chemistry 2008; 14:2180-8. [DOI: 10.1002/chem.200701277] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Ascenzi D, Tosi P, Roithová J, Ricketts CL, Schröder D, Lockyear JF, Parkes MA, Price SD. Generation of the organo-rare gas dications HCCRg2+ (Rg = Ar and Kr) in the reaction of acetylene dications with rare gases. Phys Chem Chem Phys 2008; 10:7121-8. [DOI: 10.1039/b810398d] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Roithová J, Ricketts CL, Schröder D. On the C-C Coupling of the Naphthylium Ion with Methane. ACTA ACUST UNITED AC 2008. [DOI: 10.1135/cccc20080811] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Unlike other medium-sized hydrocarbon cations CmHn+ (m = 7-11, n = 6-12), the naphthylium ion C10H7+ undergoes a thermal reaction with methane to form the C-C coupled product C11H9+ concomitant with dehydrogenation. This reaction, which might be of relevance in the context of the growth of hydrocarbon species under extreme conditions, is suggested to lead to a benzylium-type cation in analogy to the C-C coupling of phenyl cations with methane.
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Ascenzi D, Tosi P, Roithová J, Schröder D. Gas-phase synthesis of the rare-gas carbene cation ArCH2+ using doubly ionised bromomethane as a superelectrophilic reagent. Chem Commun (Camb) 2008:4055-7. [DOI: 10.1039/b811115d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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43
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Roithová J, Ricketts C, Schröder D, Price S. Bond Formation with Maintenance of Twofold Charge: Generation of C2O32+ in the Reaction of CO22+ with CO2. Angew Chem Int Ed Engl 2007; 46:9316-9. [DOI: 10.1002/anie.200704286] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Roithová J, Ricketts C, Schröder D, Price S. Bindungsbildung unter Erhalt der zweifachen Ladung: Erzeugung von C2O32+ aus CO22+ und CO2. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200704286] [Citation(s) in RCA: 3] [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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45
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Roithova J, Schröder D. Gas-phase models for catalysis: alkane activation and olefin epoxidation by the triatomic cation Ag2O+. J Am Chem Soc 2007; 129:15311-8. [PMID: 18020337 DOI: 10.1021/ja075628p] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrospray ionization of aqueous silver nitrate is used for the preparation of the disilver-oxide cation Ag2O+ in the gas phase. The mass-selected cation is capable of activating C-H bonds of simple alkanes other than methane via H-atom abstraction, i.e., Ag2O+ + R-H --> Ag2OH+ + R* (R = C2H5, C3H7, C4H9). Clean O-atom transfer from Ag2O+ is observed with ethene as a neutral reagent, whereas oxygenation and allylic C-H abstraction compete in the case of propene. The gaseous Ag2O+ cation can thus be regarded as a minimalist model for the problems associated with the silver-mediated epoxidation of olefins more complex than ethene itself. The experimental findings are fully supported by the results of quantum chemical studies, thereby providing deep mechanistic insight into the reactions in the idealized gas phase, which also might have implications for further improvements in applied catalysis.
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Affiliation(s)
- Jana Roithova
- Department of Organic Chemistry, Charles University in Prague, Faculty of Sciences, Hlavova 8, 12843 Prague 2, Czech Republic
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46
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Roithová J, Schröder D, Mísek J, Stará IG, Starý I. Chiral superbases: the proton affinities of 1- and 2-aza[6]helicene in the gas phase. JOURNAL OF MASS SPECTROMETRY : JMS 2007; 42:1233-7. [PMID: 17665419 DOI: 10.1002/jms.1256] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The proton affinities (PAs) of 1- and 2-azahelicene were determined using various mass spectrometric techniques and complementary results from density functional theory. With PAs of about 1000 kJ mol(-1), the helical backbone of both compounds offer promising perspectives for future research on enantioselective reactions of these helical nitrogen bases.
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Affiliation(s)
- Jana Roithová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo Námestí 2, 16610, Praha 6, Czech Republic
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Roithová J, Milko P, Ricketts CL, Schröder D, Besson T, Dekoj V, Belohradský M. Dissociation Reactions of Free Tetrapyridinium Tetracations and of Their Catenanes. J Am Chem Soc 2007; 129:10141-8. [PMID: 17655231 DOI: 10.1021/ja071058h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Electrospray ionization from methanolic solution can be used for the generation of the free cyclophane tetracations 1(4+) -3(4+) from the corresponding hexafluorophosphates. In the idealized gas phase, these tetracations are long-lived and can easily be handled for further spectroscopic studies. Collision-induced dissociation of the free tetracations brings about charge separation via cleavage of the pyridinium bonds, leading to a pair of dications. Subsequently, these dications undergo another charge separation reaction to finally afford singly charged cations. In addition to the free tetracations, also the corresponding trications having one PF6- counterion are examined. Collision-induced dissociation of the trications leads to a formal substitution reaction concomitant with C-F bond formation. Further, the catenanes of the tetracations 1(4+) -3(4+) with bis-p-phenylene-34-crown-10 (4) are investigated. For the parent compound 1, also the gas-phase infrared spectrum is reported for the first time.
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Affiliation(s)
- Jana Roithová
- Institute of Organic Chemistry and Biochemistry, Flemingovo nAm. 2, 16610 Prague 6, Czech Republic
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48
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Roithová J, Schröder D. Bimolecular reactions of molecular dications: reactivity paradigms and bond-forming processes. Phys Chem Chem Phys 2007; 9:2341-9. [PMID: 17492096 DOI: 10.1039/b617681j] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The bimolecular reactivity of molecular dications in the gas phase is reviewed from an experimental point of view. Recent research has demonstrated that in addition to the ubiquitous occurrence of electron transfer in the reactions of gaseous dications with neutral molecules, bond-forming reactions play a much larger role than anticipated before. Thus, quite a number of hydrogen-containing dications show proton transfer to neutral reagents as an abundant or even as the major pathway, and also the nature of the neutral reagent itself is decisive for the amount of proton transfer which takes place. Further, several hydrocarbon dications C(m)H(n)(2+) of medium size (m = 6-14, n = 6-10) undergo bond-forming reactions with unsaturated hydrocarbons such as acetylene or benzene, thereby offering new routes for the formation of larger aromatic compounds under extreme conditions such as interstellar environments. Likewise, recent results on the bimolecular reactivity of multiply charged metal ions have revealed the occurrence of a number of new bond-forming reactions which open promising prospects for further research.
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Affiliation(s)
- Jana Roithová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Praha 6, Czech Republic
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