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Nguyen HVL, Caminati W, Grabow JU. The LAM of the Rings: Large Amplitude Motions in Aromatic Molecules Studied by Microwave Spectroscopy. Molecules 2022; 27:3948. [PMID: 35745072 PMCID: PMC9230607 DOI: 10.3390/molecules27123948] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/27/2022] [Accepted: 06/06/2022] [Indexed: 11/17/2022] Open
Abstract
Large amplitude motions (LAMs) form a fundamental phenomenon that demands the development of specific theoretical and Hamiltonian models. In recent years, along with the strong progress in instrumental techniques on high-resolution microwave spectroscopy and computational capacity in quantum chemistry, studies on LAMs have become very diverse. Larger and more complex molecular systems have been taken under investigation, ranging from series of heteroaromatic molecules from five- and six-membered rings to polycyclic-aromatic-hydrocarbon derivatives. Such systems are ideally suited to create families of molecules in which the positions and the number of LAMs can be varied, while the heteroatoms often provide a sufficient dipole moment to the systems to warrant the observation of their rotational spectra. This review will summarize three types of LAMs: internal rotation, inversion tunneling, and ring puckering, which are frequently observed in aromatic five-membered rings such as furan, thiophene, pyrrole, thiazole, and oxazole derivatives, in aromatic six-membered rings such as benzene, pyridine, and pyrimidine derivatives, and larger combined rings such as naphthalene, indole, and indan derivatives. For each molecular class, we will present the representatives and summarize the recent insights on the molecular structure and internal dynamics and how they help to advance the field of quantum mechanics.
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Affiliation(s)
- Ha Vinh Lam Nguyen
- Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, F-94010 Créteil, France
- Institut Universitaire de France (IUF), F-75231 Paris, France
| | - Walther Caminati
- Departimento di Chimica ‘G. Ciamican’, Universita degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy;
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie und Elektrochemie, Gottfried-Wilhelm-Leibniz-Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
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2
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Insausti A, Ma J, Yang Q, Xie F, Xu Y. Rotational Spectroscopy of 2-Furoic Acid and Its Dimer: Conformational Distribution and Double Proton Tunneling. Chemphyschem 2022; 23:e202200176. [PMID: 35390214 DOI: 10.1002/cphc.202200176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/06/2022] [Indexed: 01/18/2023]
Abstract
Structural and tunneling properties of the 2-furoic acid (FA) monomer and dimer were investigated using rotational spectroscopy and DFT calculations. CREST, a conformational ensemble space exploration tool, was used to identify all possible low energy conformations of the FA monomer and dimer, followed by the DFT geometry optimization and harmonic frequency calculations. Broadband rotational spectra in the 2-6 GHz and in the 8-12 GHz regions were recorded in a supersonic jet expansion. The monomeric FA was found to exist dominantly as three different conformers: I , II , and III in a jet, with I and II taking on the trans -COOH configuration while III having the cis -COOH configuration. For the FA dimer, only the I - II conformer was observed experimentally, whereas the symmetric I - I and II - II conformers were not observed because of their zero dipole moments. The analysis of the splittings in the rotational transitions of I - II allowed one to extract the tunneling splitting to be 1056.0(12) MHz. The barrier height was determined to be ~442 cm -1 using the scaled potential energy scans at several different levels of theory.
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Affiliation(s)
- Aran Insausti
- UPV/EHU: Universidad del Pais Vasco, Departamento de Química Física, SPAIN
| | - Jiarui Ma
- University of Alberta Department of Renewable Resources, Chemistry, CANADA
| | - Qian Yang
- University of Alberta, Chemistry, CANADA
| | - Fan Xie
- DESY Accelerator Centre: Deutsches Elektronen-Synchrotron, Spectroscopy of molecular processes, GERMANY
| | - Yunjie Xu
- University of Alberta Faculty of Science, Chemistry Department, 11227 Saskatchewan Drive, T6G 2G2, Edmonton, CANADA
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3
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Li W, Melandri S, Evangelisti L, Calabrese C, Vigorito A, Maris A. Characterizing hydrogen and tetrel bonds in clusters of CO 2 with carboxylic acids. Phys Chem Chem Phys 2021; 23:16915-16922. [PMID: 34337625 DOI: 10.1039/d1cp02568f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The interaction between carbon dioxide and planar carboxylic acids has been investigated through the analysis of the microwave spectrum of the acrylic acid·CO2 complex and quantum chemical modeling of the R-COOH·(CO2)1,16 clusters, where R = H, CH2CH. As regards the 1 : 1 compounds, two species, involving the s-cis and s-trans conformers of acrylic acid were observed. For both of them, a similar bidentate interaction arises between the carbonyl group of CO2 and the carboxylic group of the organic acid, leading to the formation of a planar six-membered ring. The binding energy is estimated to be De ≃ 21 kJ mol-1, 1/3 being the energy contributions of the tetrel to hydrogen bonds, respectively. In the 1 : 16 clusters, the ring arrangement is broken, allowing for the interaction of the acid with several CO2 molecules. The CO2 molecules completely surround formic acid, whereas, in the case of acrylic acid, they tend to avoid the allyl chain.
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Affiliation(s)
- Weixing Li
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, via Selmi 2, I-40126 Bologna, Italy.
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4
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Nguyen HVL, Gulaczyk I, Kręglewski M, Kleiner I. Large amplitude inversion tunneling motion in ammonia, methylamine, hydrazine, and secondary amines: From structure determination to coordination chemistry. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213797] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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5
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Li X, Lu T, Obenchain DA, Zhang J, Herbers S, Grabow JU, Feng G. The Characteristics of Disulfide-Centered Hydrogen Bonds. Angew Chem Int Ed Engl 2021; 60:5838-5842. [PMID: 33258264 DOI: 10.1002/anie.202014364] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Indexed: 11/10/2022]
Abstract
The disulfide-centered hydrogen bonds in the three different model systems of diethyl disulfide⋅⋅⋅H2 O/H2 CO/HCONH2 clusters were characterized by high-resolution Fourier transform microwave spectroscopy and quantum chemical computations. The global minimum energy structures for each cluster are experimentally observed and are characterized by one of the three different S-S⋅⋅⋅H-C/N/O disulfide-centered hydrogen bonds and two O⋅⋅⋅H-C hydrogen bonds. Non-covalent interaction and natural bond orbital analyses further confirm the experimental observations. The symmetry-adapted perturbation theory (SAPT) analysis reveals that electrostatic is dominant in diethyl disulfide⋅⋅⋅H2 O/HCONH2 clusters being consistent with normal hydrogen bonds, whilst dispersion takes over in diethyl disulfide⋅⋅⋅H2 CO cluster. Our study gives accurate structural parameters for the disulfide bond involved non-covalent clusters providing important benchmarking data for the theoretical evaluation of more complex systems.
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Affiliation(s)
- Xiaolong Li
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.,Institut für Physikalische Chemie and Elektrochemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstraße 3A, 30167, Hannover, Germany
| | - Tao Lu
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China
| | - Daniel A Obenchain
- Institut für Physikalische Chemie and Elektrochemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstraße 3A, 30167, Hannover, Germany
| | - Jiaqi Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China
| | - Sven Herbers
- Institut für Physikalische Chemie and Elektrochemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstraße 3A, 30167, Hannover, Germany
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie and Elektrochemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstraße 3A, 30167, Hannover, Germany
| | - Gang Feng
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China
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6
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Eraković M, Cvitaš MT. Tunnelling splitting patterns in some partially deuterated water trimers. Phys Chem Chem Phys 2021; 23:4240-4254. [PMID: 33586727 DOI: 10.1039/d0cp06135b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We apply our recently developed semiclassical method for calculating tunnelling splittings (TS) in asymmetric systems to make the first characterization of the ground-state TS pattern of some partially deuterated water trimers. Similarly to homoisotopic water trimers, the ground-state TS patterns are explained in terms of six distinct rearrangement mechanisms. TS patterns in (D2O)(H2O)2 and (H2O)(D2O)2 are composed of sextets induced by the dynamics of flips, and each of its levels is further finely split into a quartet of doublets and a doublet of quartets, respectively, due to various bifurcation dynamics. The TS pattern is obtained using 18 distinct tunnelling matrix elements. TS patterns of (HOD)(H2O)2 and (HOD)(D2O)2 each consists of two sextets, belonging to in-bond and out-of-bond substituted isomers. These sextet levels are further split into quartets by bifurcations. The TS pattern is computed in terms of 13 matrix elements. We also derive analytic expressions for bifurcation tunnelling splittings in terms of tunnelling matrix elements using symmetry. The present approach can be applied to other water clusters and also to the low-lying vibrationally excited states and should help in the interpretation and assignment of experimental spectra in the future.
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Affiliation(s)
- Mihael Eraković
- Department of Physical Chemistry, Ruđer Bošković Institute, 10000 Zagreb, Croatia.
| | - Marko T Cvitaš
- Department of Physical Chemistry, Ruđer Bošković Institute, 10000 Zagreb, Croatia.
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7
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Li X, Lu T, Obenchain DA, Zhang J, Herbers S, Grabow J, Feng G. The Characteristics of Disulfide‐Centered Hydrogen Bonds. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaolong Li
- School of Chemistry and Chemical Engineering Chongqing University Daxuecheng South Rd. 55 401331 Chongqing China
- Institut für Physikalische Chemie and Elektrochemie Gottfried Wilhelm Leibniz Universität Hannover Callinstraße 3A 30167 Hannover Germany
| | - Tao Lu
- School of Chemistry and Chemical Engineering Chongqing University Daxuecheng South Rd. 55 401331 Chongqing China
| | - Daniel A. Obenchain
- Institut für Physikalische Chemie and Elektrochemie Gottfried Wilhelm Leibniz Universität Hannover Callinstraße 3A 30167 Hannover Germany
| | - Jiaqi Zhang
- School of Chemistry and Chemical Engineering Chongqing University Daxuecheng South Rd. 55 401331 Chongqing China
| | - Sven Herbers
- Institut für Physikalische Chemie and Elektrochemie Gottfried Wilhelm Leibniz Universität Hannover Callinstraße 3A 30167 Hannover Germany
| | - Jens‐Uwe Grabow
- Institut für Physikalische Chemie and Elektrochemie Gottfried Wilhelm Leibniz Universität Hannover Callinstraße 3A 30167 Hannover Germany
| | - Gang Feng
- School of Chemistry and Chemical Engineering Chongqing University Daxuecheng South Rd. 55 401331 Chongqing China
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8
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Xie F, Seifert NA, Jäger W, Xu Y. Conformational Panorama and Chirality Controlled Structure–Energy Relationship in a Chiral Carboxylic Acid Dimer. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005685] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fan Xie
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Nathan A. Seifert
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
- Chemical Sciences and Engineering Division Argonne National Laboratory Argonne IL 60439 USA
| | - Wolfgang Jäger
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Yunjie Xu
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
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9
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Xie F, Seifert NA, Jäger W, Xu Y. Conformational Panorama and Chirality Controlled Structure–Energy Relationship in a Chiral Carboxylic Acid Dimer. Angew Chem Int Ed Engl 2020; 59:15703-15710. [DOI: 10.1002/anie.202005685] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/27/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Fan Xie
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Nathan A. Seifert
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
- Chemical Sciences and Engineering Division Argonne National Laboratory Argonne IL 60439 USA
| | - Wolfgang Jäger
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
| | - Yunjie Xu
- Department of Chemistry University of Alberta Edmonton Alberta T6G 2G2 Canada
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10
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Macario A, Blanco S, Thomas J, Xu Y, López JC. Competition Between Intra- and Intermolecular Hydrogen Bonding: o-Anisic Acid⋅⋅⋅Formic Acid Heterodimer. Chemistry 2019; 25:12325-12331. [PMID: 31251419 DOI: 10.1002/chem.201902086] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/21/2019] [Indexed: 11/11/2022]
Abstract
Four conformers of the heterodimer o-anisic acid-formic acid, formed in a supersonic expansion, have been probed by Fourier transform microwave spectroscopy. Two of these forms have the typical double intermolecular hydrogen-bond cyclic structure. The other two show the o-anisic acid moiety bearing a trans-COOH arrangement supported by an intramolecular O-H⋅⋅⋅O bond to the neighbor methoxy group. In these conformers, formic acid interacts with o-anisic acid mainly through an intermolecular O-H⋅⋅⋅O hydrogen bond either to the O-H or to the C=O moieties, reinforced by other weak interactions. Surprisingly, the most abundant conformer in the supersonic expansion is the complex in which the o-anisic acid is in trans arrangement with the formic acid interacting with the O-H group. Such a trans-COOH arrangement in which the intramolecular hydrogen bond dominates over the usually observed double intermolecular hydrogen bond interaction has never been observed previously in an acid-acid dimer.
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Affiliation(s)
- Alberto Macario
- Dpto. Química FísicayQuímica Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo Belén 7, 47011, Valladolid, Spain
| | - Susana Blanco
- Dpto. Química FísicayQuímica Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo Belén 7, 47011, Valladolid, Spain
| | - Javix Thomas
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Yunjie Xu
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Juan Carlos López
- Dpto. Química FísicayQuímica Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo Belén 7, 47011, Valladolid, Spain
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11
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Macario A, Blanco S, Thomas J, Xu Y, López JC. Conformational Landscape of m-Anisic Acid and Its Complexes with Formic Acid. J Phys Chem A 2019; 123:6772-6780. [DOI: 10.1021/acs.jpca.9b05295] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Alberto Macario
- Dpto. Química Física y Química Inorgánica, Facultad de Ciencias, IU Cinquima, Universidad de Valladolid, Paseo Belén 7, 47011 Valladolid, Spain
| | - Susana Blanco
- Dpto. Química Física y Química Inorgánica, Facultad de Ciencias, IU Cinquima, Universidad de Valladolid, Paseo Belén 7, 47011 Valladolid, Spain
| | - Javix Thomas
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Yunjie Xu
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Juan Carlos López
- Dpto. Química Física y Química Inorgánica, Facultad de Ciencias, IU Cinquima, Universidad de Valladolid, Paseo Belén 7, 47011 Valladolid, Spain
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12
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Bhattacharya I, Banerjee P, Sadhukhan J, Chakraborty T. Modulations of ν O-H and ν C═O Stretching Frequencies of Difluoroacetic Acid with Internal Rotation of CHF 2 Rotor: A Combined Vapor Phase and Matrix Isolation Infrared Spectroscopy Study. J Phys Chem A 2019; 123:2771-2779. [PMID: 30852897 DOI: 10.1021/acs.jpca.8b12528] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mid-infrared spectra of difluoroacetic acid (DFAA) have been measured by isolating the molecule in argon and nitrogen matrices at 8 K and also in the vapor phase at room temperature. In argon matrix, the O-H stretching fundamental (νO-H) of -COOH group appears as a doublet with band maxima at 3554 and 3558 cm-1, and a similar doublet for C═O stretching fundamental appears at 1800 and 1810 cm-1. In the vapor phase, the νO-H transition is featured with multiple peaks, and the observed band shape has been deconvoluted as superposition of two transitions both having A-type rotational band contours. We have attributed these transitions to the two internal rotational isomers corresponding to the two distinct minima along -CHF2 torsional coordinate of the molecule. Natural bond orbital (NBO) analysis reveals that these torsional minima are the manifestations of different second order interactions involving bonding and antibonding orbitals corresponding to the rotor -CHF2 and COOH groups of the molecule. By use of the theoretically predicted rotational constants of the rotamers, the band profile for νO-H has been simulated satisfactorily by means of the PGOPHER method, and this has allowed estimating accurately the energy difference between the two rotamers as 0.54 kcal/mol. The predicted energy barrier for interconversion between the rotamers is very small, ∼0.5 kcal/mol from rotamer II to rotamer I, which implies that the molecule could hop almost freely between the two rotameric forms at room temperature. As a result, the frequencies of the key stretching vibrational modes, like νO-H, νC═O, and νC-H, undergo modulation with internal rotation of the rotor -CHF2 group. Such modulation of high frequency modes could be an efficient mechanism for acceleration of rotor-induced IVR (intramolecular vibrational redistribution) well documented in the literature. Furthermore, the spectra measured in matrix isolated environment show signatures for an energetically higher third rotamer, where -OH and -C═O groups are in anti orientation. It has also been shown that DFAA can easily form weak hydrogen bonded dimeric complexes with molecular nitrogen (N2), which causes νO-H to undergo a red shift of ∼30 cm-1 in argon matrix for all three DFAA monomers.
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Affiliation(s)
- Indrani Bhattacharya
- School of Chemical Sciences , Indian Association for the Cultivation of Science , Kolkata 700032 , India
| | - Pujarini Banerjee
- School of Chemical Sciences , Indian Association for the Cultivation of Science , Kolkata 700032 , India
| | - Jayshree Sadhukhan
- School of Chemical Sciences , Indian Association for the Cultivation of Science , Kolkata 700032 , India.,Department of Chemistry , Government General Degree College, Singur , Hooghly , West Bengal 712409 , India
| | - Tapas Chakraborty
- School of Chemical Sciences , Indian Association for the Cultivation of Science , Kolkata 700032 , India
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Li W, Evangelisti L, Gou Q, Caminati W, Meyer R. The Barrier to Proton Transfer in the Dimer of Formic Acid: A Pure Rotational Study. Angew Chem Int Ed Engl 2019; 58:859-865. [DOI: 10.1002/anie.201812754] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Weixing Li
- Dipartimento di Chimica “G. Ciamician”University of Bologna Via Selmi 2 40126 Bologna Italy
| | - Luca Evangelisti
- Dipartimento di Chimica “G. Ciamician”University of Bologna Via Selmi 2 40126 Bologna Italy
| | - Qian Gou
- School of Chemistry and Chemical EngineeringChongqing University Daxuecheng South Rd. 55 401331 Chongqing China
| | - Walther Caminati
- Dipartimento di Chimica “G. Ciamician”University of Bologna Via Selmi 2 40126 Bologna Italy
| | - Rolf Meyer
- Sonnenbergstrasse 18 5621 Zufikon Switzerland
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14
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Li W, Evangelisti L, Gou Q, Caminati W, Meyer R. Barrier to Proton Transfer in the Dimer of Formic Acid: A Pure Rotational Study. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201812754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Weixing Li
- Dipartimento di Chimica “G. Ciamician”University of Bologna Via Selmi 2 40126 Bologna Italy
| | - Luca Evangelisti
- Dipartimento di Chimica “G. Ciamician”University of Bologna Via Selmi 2 40126 Bologna Italy
| | - Qian Gou
- School of Chemistry and Chemical EngineeringChongqing University Daxuecheng South Rd. 55 401331 Chongqing China
| | - Walther Caminati
- Dipartimento di Chimica “G. Ciamician”University of Bologna Via Selmi 2 40126 Bologna Italy
| | - Rolf Meyer
- Sonnenbergstrasse 18 5621 Zufikon Switzerland
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15
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Meyer KAE, Suhm MA. Vibrational exciton coupling in homo and hetero dimers of carboxylic acids studied by linear infrared and Raman jet spectroscopy. J Chem Phys 2018; 149:104307. [DOI: 10.1063/1.5043400] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Katharina A. E. Meyer
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstr. 6, 37077 Göttingen, Germany
| | - Martin A. Suhm
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstr. 6, 37077 Göttingen, Germany
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16
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Evangelisti L, Spada L, Li W, Vazart F, Barone V, Caminati W. The Borderline between Reactivity and Pre-reactivity of Binary Mixtures of Gaseous Carboxylic Acids and Alcohols. Angew Chem Int Ed Engl 2017; 56:3872-3875. [PMID: 28252840 DOI: 10.1002/anie.201612231] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 01/16/2017] [Indexed: 01/10/2023]
Abstract
By mixing primary and secondary alcohols with carboxylic acids just before the supersonic expansion within pulsed Fourier transform microwave experiments, only the rotational spectrum of the ester was observed. However, when formic acid was mixed with tertiary alcohols, adducts were formed and their rotational spectra could be easily measured. Quantum mechanical calculations were performed to interpret the experimental evidence.
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Affiliation(s)
- Luca Evangelisti
- Dipartimento di Chimica "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - Lorenzo Spada
- Dipartimento di Chimica "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy.,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126, Pisa, Italy
| | - Weixing Li
- Dipartimento di Chimica "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - Fanny Vazart
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126, Pisa, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126, Pisa, Italy
| | - Walther Caminati
- Dipartimento di Chimica "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy
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17
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Evangelisti L, Spada L, Li W, Vazart F, Barone V, Caminati W. The Borderline between Reactivity and Pre-reactivity of Binary Mixtures of Gaseous Carboxylic Acids and Alcohols. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612231] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Luca Evangelisti
- Dipartimento di Chimica “G. Ciamician”; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Lorenzo Spada
- Dipartimento di Chimica “G. Ciamician”; University of Bologna; Via Selmi 2 40126 Bologna Italy
- Scuola Normale Superiore; Piazza dei Cavalieri 7 56126 Pisa Italy
| | - Weixing Li
- Dipartimento di Chimica “G. Ciamician”; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Fanny Vazart
- Scuola Normale Superiore; Piazza dei Cavalieri 7 56126 Pisa Italy
| | - Vincenzo Barone
- Scuola Normale Superiore; Piazza dei Cavalieri 7 56126 Pisa Italy
| | - Walther Caminati
- Dipartimento di Chimica “G. Ciamician”; University of Bologna; Via Selmi 2 40126 Bologna Italy
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Evangelisti L, Spada L, Li W, Blanco S, López JC, Lesarri A, Grabow JU, Caminati W. A butterfly motion of formic acid and cyclobutanone in the 1 : 1 hydrogen bonded molecular cluster. Phys Chem Chem Phys 2017; 19:204-209. [DOI: 10.1039/c6cp06941j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Large tunnelling splittings reveal the relative motions and the inversion pathway in the formic acid–cyclobutanone cluster.
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Affiliation(s)
- Luca Evangelisti
- Dipartimento di Chimica “G. Ciamician” dell'Università
- I-40126 Bologna
- Italy
| | - Lorenzo Spada
- Dipartimento di Chimica “G. Ciamician” dell'Università
- I-40126 Bologna
- Italy
| | - Weixing Li
- Dipartimento di Chimica “G. Ciamician” dell'Università
- I-40126 Bologna
- Italy
| | - Susana Blanco
- Departamento de Química Física y Química Inorgánica
- Facultad de Ciencias
- Universidad de Valladolid
- E-47011 Valladolid
- Spain
| | - Juan Carlos López
- Departamento de Química Física y Química Inorgánica
- Facultad de Ciencias
- Universidad de Valladolid
- E-47011 Valladolid
- Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica
- Facultad de Ciencias
- Universidad de Valladolid
- E-47011 Valladolid
- Spain
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie und Elektrochemie
- Lehrgebiet A
- Gottfried-Wilhelm-Leibniz-Universität
- D-30167 Hannover
- Germany
| | - Walther Caminati
- Dipartimento di Chimica “G. Ciamician” dell'Università
- I-40126 Bologna
- Italy
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19
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20
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Evangelisti L, Spada L, Li W, Ciurlini A, Grabow JU, Caminati W. Shape of the Adduct Formic Acid–Dimethyl Ether: A Rotational Study. J Phys Chem A 2016; 120:2863-7. [DOI: 10.1021/acs.jpca.6b02912] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luca Evangelisti
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Lorenzo Spada
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Weixing Li
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Anna Ciurlini
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Jens-Uwe Grabow
- Institut
für Physikalische Chemie und Elektrochemie, Lehrgebiet A, Gottfried-Wilhelm-Leibniz-Universität, Callinstrasse 3A, D-30167 Hannover, Germany
| | - Walther Caminati
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
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21
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Spada L, Gou Q, Giuliano BM, Caminati W. Interactions between Carboxylic Acids and Heteroaromatics: A Rotational Study of Formic Acid–Pyridine. J Phys Chem A 2016; 120:5094-8. [DOI: 10.1021/acs.jpca.6b00387] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Lorenzo Spada
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Qian Gou
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
- College
of Chemistry and Chemical Engineering, Chongqing University, Daxuechengnan
Road 55, Chongqing, 401331, China
| | - Barbara M. Giuliano
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Walther Caminati
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
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22
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Gou Q, Spada L, Lòpez JC, Grabow JU, Caminati W. Chloromethane-water adduct: rotational spectrum, weak hydrogen bonds, and internal dynamics. Chem Asian J 2015; 10:1198-203. [PMID: 25677836 DOI: 10.1002/asia.201500013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 02/02/2015] [Indexed: 11/11/2022]
Abstract
The rotational spectra of four isotopologues of the 1:1 complex between chloromethane and water revealed the presence of only one rotamer in a pulsed jet expansion. The two subunits are linked through two weak hydrogen bonds, O-H⋅⋅⋅Cl (R(H⋅⋅⋅Cl) =2.638(2) Å) and C-H⋅⋅⋅O (R(H⋅⋅⋅O) =2.501(2) Å), forming a five-membered ring. All transitions display the hyperfine structure due to the (35)Cl (or (37)Cl) nuclear quadrupole effects. Dynamical features in the spectrum are caused by two large-amplitude motions. Each component line appears as an asymmetric doublet with a relative intensity ratio of 1:3. The splittings led to the determination of barrier to internal rotation of water around its symmetry axis, V(2) =320(10) cm(-1). Finally, an unexpected small value of the inertial defect (-0.96 uÅ(2) rather than -3.22 uÅ(2)) allowed the estimation of the barrier to the internal rotation of the CH(3) group, V(3) ≈8 cm(-1).
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Affiliation(s)
- Qian Gou
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, Via Selmi 2, 40126 Bologna (Italy), Fax: (+39) 0512099456
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23
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Kannengießer R, Klahm S, Vinh Lam Nguyen H, Lüchow A, Stahl W. The effects of methyl internal rotation and 14N quadrupole coupling in the microwave spectra of two conformers of N,N-diethylacetamide. J Chem Phys 2014; 141:204308. [DOI: 10.1063/1.4901980] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Gou Q, Favero LB, Bahamyirou SS, Xia Z, Caminati W. Interactions between Carboxylic Acids and Aldehydes: A Rotational Study of HCOOH–CH2O. J Phys Chem A 2014; 118:10738-41. [DOI: 10.1021/jp506600p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Qian Gou
- Dipartimento di
Chimica “G. Ciamician” dell’Università, via Selmi 2, I-40126 Bologna, Italy
| | - Laura B. Favero
- Istituto
per lo Studio dei Materiali Nanostrutturati (ISMN), Sezione di Bologna CNR, via Gobetti 101, I-40129 Bologna, Italy
| | - Somana S. Bahamyirou
- Dipartimento di
Chimica “G. Ciamician” dell’Università, via Selmi 2, I-40126 Bologna, Italy
| | - Zhining Xia
- Chemistry
and Chemistry Engineering College, Chongqing University, Shazheng
str., 174, 400040, Chongqing, P. R. China
| | - Walther Caminati
- Dipartimento di
Chimica “G. Ciamician” dell’Università, via Selmi 2, I-40126 Bologna, Italy
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Mackenzie RB, Dewberry CT, Leopold KR. The Formic Acid–Nitric Acid Complex: Microwave Spectrum, Structure, and Proton Transfer. J Phys Chem A 2014; 118:7975-85. [DOI: 10.1021/jp507060w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rebecca B. Mackenzie
- Department of Chemistry, University of Minnesota, 207 Pleasant
Street, SE, Minneapolis, Minnesota 55455, United States
| | - Christopher T. Dewberry
- Department of Chemistry, University of Minnesota, 207 Pleasant
Street, SE, Minneapolis, Minnesota 55455, United States
| | - Kenneth R. Leopold
- Department of Chemistry, University of Minnesota, 207 Pleasant
Street, SE, Minneapolis, Minnesota 55455, United States
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Gou Q, Feng G, Evangelisti L, Caminati W. Conformational Equilibria and Large-Amplitude Motions in Dimers of Carboxylic Acids: Rotational Spectrum of Acetic Acid-Difluoroacetic Acid. Chemphyschem 2014; 15:2977-84. [DOI: 10.1002/cphc.201402349] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Indexed: 11/07/2022]
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27
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Gou Q, Feng G, Evangelisti L, Caminati W. Conformers of dimers of carboxylic acids in the gas phase: A rotational study of difluoroacetic acid–formic acid. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2013.11.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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