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Robertson PA, Villani L, Robertson EG. Conformer Specific Ultraviolet and Infrared Detection of Nicotine in the Vapor Phase. J Phys Chem A 2019; 123:10152-10157. [PMID: 31644291 DOI: 10.1021/acs.jpca.9b09113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A gas-phase electronic spectrum of nicotine in a supersonic expansion has been recorded using two-color resonant two-photon ionization spectroscopy. Efficient photoionization was achievable only via the pyridine chromophore owing to poor Franck-Condon overlap in the N-methylpyrrolidine moiety. Two conformers of nicotine have been characterized and assigned by infrared-ultraviolet (IR-UV) ion depletion and IR-UV hole-burning spectroscopy, in combination with quantum chemical techniques. Trans-A with nitrogen atoms further apart is more stable by 2 kJ mol-1 and the most populated conformer in the supersonic jet, owing this stability to a stronger inter-ring CH···N hydrogen bond than the trans-B counterpart.
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Affiliation(s)
- Patrick A Robertson
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science , La Trobe University , Melbourne , Victoria 3086 , Australia.,School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , United Kingdom
| | - Luigi Villani
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science , La Trobe University , Melbourne , Victoria 3086 , Australia
| | - Evan G Robertson
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science , La Trobe University , Melbourne , Victoria 3086 , Australia
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Robertson PA, Lobo IA, Wilson DJ, Robertson EG. Nitriles as directionally tolerant hydrogen bond acceptors: IR-UV ion depletion spectroscopy of benzenepropanenitrile and its hydrate clusters. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.08.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Buev EM, Moshkin VS, Sosnovskikh VY. Spiroanthraceneoxazolidine as a synthetic equivalent of methanimine in the reaction with donor–acceptor cyclopropanes. Synthesis of diethyl 5-arylpyrrolidine-3,3-dicarboxylates. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lobo IA, Wilson DJD, Bieske E, Robertson EG. A sting in the tail of flexible molecules: spectroscopic and energetic challenges in the case of p-aminophenethylamine. Phys Chem Chem Phys 2012; 14:9219-29. [PMID: 22644595 DOI: 10.1039/c2cp40828g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The neurotransmitter analogue p-aminophenethylamine (APEA) illustrates many of the pitfalls and challenges associated with spectroscopic and conformational analysis of flexible molecules. The combined experimental-theoretical study presented here resolves a long-standing controversy over its conformational energetic preferences. Jet-cooled resonance enhanced two-photon ionisation (R2PI) and IR-UV ion depletion techniques enabled conformer-specific IR spectra in the NH-CH stretch region to be measured for four distinct conformers of APEA. Comparison of spectra with theoretical calculations (including MP2, M06-2X and B3LYP with aug-cc-pVTZ basis sets) allows the two most populated conformers to be unambiguously identified as those having a gauche arrangement of the side chain, which facilitates an NH···π type hydrogen bond. The other two observed conformers are assigned to structures with an anti-side chain. A fifth gauche conformer, predicted to be least stable, is not observed. Comparison with published conformer specific IR spectra of tyramine (Makara et al., J. Phys. Chem. A, 2008, 112, 13463-13469) and Raman spectra of phenylethylamine (Golan et al., J. Chem. Phys., 2009, 131, 024305) reveals an entirely consistent pattern of spectral signatures associated with the four specific conformations of the ethylamine side chain evident in APEA, and aids assignment of the associated CH and NH stretch fundamentals, some of which have very weak IR intensities. Extensive calculations of the relative energetic trends of the five conformers have been carried out. In comparison to the highest level of theory considered, CCSD(T)-F12b/cc-pVDZ-F12, MP2 overestimate the energy difference, whereas DFT significantly underestimates the energetic preference for NH···π stabilised gauche conformers, although inclusion of dispersion (M06-2X, B3LYP-D3) improves the DFT results.
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Affiliation(s)
- Isabella A Lobo
- Department of Chemistry and La Trobe Institute for Molecular Sciences (LIMS), La Trobe University, Bundoora, Victoria, 3086, Australia
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Kwiecień RA, Le Questel JY, Lebreton J, Delaforge M, André F, Pihan E, Roussel A, Fournial A, Paneth P, Robins RJ. Cytochrome P450-Catalyzed Degradation of Nicotine: Fundamental Parameters Determining Hydroxylation by Cytochrome P450 2A6 at the 5′-Carbon or the N-Methyl Carbon. J Phys Chem B 2012; 116:7827-40. [DOI: 10.1021/jp304276v] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Renata A. Kwiecień
- Laboratory
for the Study of Biosynthesis by Isotopic Spectroscopy, Interdisciplinary
Chemistry: Synthesis, Analysis and Modeling (CEISAM), UMR6230, University of Nantes-CNRS, 2 rue de la Houssinière,
BP 92208, F-44322 Nantes 3, France
| | - Jean-Yves Le Questel
- Laboratory
for the Study of Biosynthesis by Isotopic Spectroscopy, Interdisciplinary
Chemistry: Synthesis, Analysis and Modeling (CEISAM), UMR6230, University of Nantes-CNRS, 2 rue de la Houssinière,
BP 92208, F-44322 Nantes 3, France
| | - Jacques Lebreton
- Laboratory
for the Study of Biosynthesis by Isotopic Spectroscopy, Interdisciplinary
Chemistry: Synthesis, Analysis and Modeling (CEISAM), UMR6230, University of Nantes-CNRS, 2 rue de la Houssinière,
BP 92208, F-44322 Nantes 3, France
| | - Marcel Delaforge
- Laboratoire Stress Oxydant et Détoxication, CNRS UMR8221, iBiTec-S/SB2SM, CEA Saclay, 91191 Saclay, France
| | - François André
- Laboratoire Stress Oxydant et Détoxication, CNRS UMR8221, iBiTec-S/SB2SM, CEA Saclay, 91191 Saclay, France
| | - Emilie Pihan
- Laboratoire Stress Oxydant et Détoxication, CNRS UMR8221, iBiTec-S/SB2SM, CEA Saclay, 91191 Saclay, France
| | - Anaïs Roussel
- Laboratoire Stress Oxydant et Détoxication, CNRS UMR8221, iBiTec-S/SB2SM, CEA Saclay, 91191 Saclay, France
| | - Anaïs Fournial
- Laboratory
for the Study of Biosynthesis by Isotopic Spectroscopy, Interdisciplinary
Chemistry: Synthesis, Analysis and Modeling (CEISAM), UMR6230, University of Nantes-CNRS, 2 rue de la Houssinière,
BP 92208, F-44322 Nantes 3, France
| | - Piotr Paneth
- Laboratory for Isotope Effects
Studies, Faculty of Chemistry, Institute
of Applied Radiation Chemistry, University of Technology Lodz, Zeromskiego 116, 90-924 Łodź, Poland
| | - Richard J. Robins
- Laboratory
for the Study of Biosynthesis by Isotopic Spectroscopy, Interdisciplinary
Chemistry: Synthesis, Analysis and Modeling (CEISAM), UMR6230, University of Nantes-CNRS, 2 rue de la Houssinière,
BP 92208, F-44322 Nantes 3, France
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Grabow JU, Mata S, Alonso JL, Peña I, Blanco S, López JC, Cabezas C. Rapid probe of the nicotine spectra by high-resolution rotational spectroscopy. Phys Chem Chem Phys 2011; 13:21063-9. [DOI: 10.1039/c1cp22197c] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Leemans E, Mangelinckx S, De Kimpe N. Asymmetric synthesis of 2-arylpyrrolidines starting from γ-chloro N-(tert-butanesulfinyl)ketimines. Chem Commun (Camb) 2010; 46:3122-4. [DOI: 10.1039/b925209f] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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