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Rai PK, Kumar P. Mechanistic Inside into the Gas-Phase NO3·+HO2· Reaction. J Phys Chem A 2024. [PMID: 39253769 DOI: 10.1021/acs.jpca.4c04306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
The reaction between NO 3 · and HO 2 · is critical in nighttime atmospheric chemistry. This reaction is believed to occur via two channels: one leading to the formation of HNO3 and the other forming OH · . A long-standing question regarding this reaction is whether this reaction occurs through HNO3 path or OH · or both at a time. Some indirect experiments proposed the HNO3 path as the exclusive path, while some suggested the possibility of both the paths. In the present work, using high-level quantum chemical and kinetics calculations, we have tried to shed light on the mechanism of this reaction. We have incorporated full triple excitation and partial quadratic excitation corrections at the coupled-cluster level for our energetics part, whereas a master equation approach has been employed to obtain the rate constants within 213-400 K. Our investigation suggests that it is only the OH · path through which the reaction takes place.
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Affiliation(s)
- Philips Kumar Rai
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India
| | - Pradeep Kumar
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India
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2
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Alkorta I, Plane JMC, Elguero J, Dávalos JZ, Acuña AU, Saiz-Lopez A. Reply to the 'Comment on "Theoretical study of the NO 3 radical reaction with CH 2ClBr, CH 2ICl, CH 2BrI, CHCl 2Br, and CHClBr 2"' by C. J. Nielsen and Y. Tang, Phys. Chem. Chem. Phys., 2022, 24, DOI: 10.1039/D2CP03013F. Phys Chem Chem Phys 2023; 25:4357-4358. [PMID: 36656745 DOI: 10.1039/d2cp04659h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In this Reply, we answer the main argument raised in the Comment about the energy of the NO3 radical and its influence in the reaction profiles of the reaction of the NO3 radical with CH2ClBr, CH2ICl, CH2BrI, CHCl2Br, and CHClBr2 by C. J. Nielsen and Y. Tang. The optimized geometry of the NO3 radical has been obtained using 49 DFT functionals: 26 functionals predict a minimum with D3h symmetry and 23 with C2v symmetry. The former functionals have been used to calculate the thermodynamic values of three reactions (X + HNO3 → XH + NO3, X= OH, CH3 and CCl3) and compared with experimental data. Those functionals with smaller errors have been used to recalculate the barriers of the reaction of NO3 with CH2ClBr, CH2ICl, CH2BrI, CHCl2Br, and CHClBr2. The results show differences of 10.5 kJ mol-1 when compared to those obtained with the M08HX functional.
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Affiliation(s)
- Ibon Alkorta
- Instituto de Química Médica (CSIC), Juan de la Cierva, 3, E-28006 Madrid, Spain.
| | - John M C Plane
- School of Chemistry, University of Leeds, LS2 9TJ Leeds, UK
| | - José Elguero
- Instituto de Química Médica (CSIC), Juan de la Cierva, 3, E-28006 Madrid, Spain.
| | - Juan Z Dávalos
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid E-28006, Spain.
| | - A Ulises Acuña
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid E-28006, Spain.
| | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid E-28006, Spain.
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3
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Nielsen CJ, Tang Y. Comment on "Theoretical study of the NO 3 radical reaction with CH 2ClBr, CH 2ICl, CH 2BrI, CHCl 2Br, and CHClBr 2" by I. Alkorta, J. M. C. Plane, J. Elguero, J. Z. Dávalos, A. U. Acuña and A. Saiz-Lopez, Phys. Chem. Chem. Phys. 2022, 24, 14365. Phys Chem Chem Phys 2023; 25:4355-4356. [PMID: 36656617 DOI: 10.1039/d2cp03013f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
This comment addresses a systematic error in the potential energy surfaces of the title reactions presented in the original article by Alkorta et al. The NO3 radical has D3h symmetry in the electronic ground state while the M08HX functional employed in the original article predicts an incorrect C2v geometry and energy. By combining thermodynamic data for the OH + HNO3 → H2O + NO3 reaction with spectroscopic data and results from M08HX calculations on HNO3, H2O and the OH radical, the ground state NO3 radical energy is estimated to be 37 kJ mol-1 lower than reported for the C2v geometry.
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Affiliation(s)
- Claus Jørgen Nielsen
- Section for Environmental Sciences, Department of Chemistry, University of Oslo, P.O. Box. 1033 Blindern, NO-0315 Oslo, Norway.
| | - Yizhen Tang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Fushun Road 11, Qingdao, 266033, China
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4
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Williams DMG, Eisfeld W, Viel A. Simulation of the photodetachment spectra of the nitrate anion (NO3-) in the B 2E' energy range and non-adiabatic electronic population dynamics of NO3. Phys Chem Chem Phys 2022; 24:24706-24713. [DOI: 10.1039/d2cp02873e] [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 photodetachment spectrum of the nitrate anion (NO3-) in the energy range of the NO3 second excited state is simulated from first principles using quantum wave packet dynamics. The prediction...
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5
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Paul SK, Herbert JM. Probing Interfacial Effects on Ionization Energies: The Surprising Banality of Anion-Water Hydrogen Bonding at the Air/Water Interface. J Am Chem Soc 2021; 143:10189-10202. [PMID: 34184532 DOI: 10.1021/jacs.1c03131] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Liquid microjet photoelectron spectroscopy is an increasingly common technique to measure vertical ionization energies (VIEs) of aqueous solutes, but the interpretation of these experiments is subject to questions regarding sensitivity to bulk versus interfacial solvation environments. We have computed aqueous-phase VIEs for a set of inorganic anions, using a combination of molecular dynamics simulations and electronic structure calculations, with results that are in excellent agreement with experiment regardless of whether the simulation data are restricted to ions at the air/water interface or to those in bulk aqueous solution. Although the computed VIEs are sensitive to ion-water hydrogen bonding, we find that the short-range solvation structure is sufficiently similar in both environments that it proves impossible to discriminate between the two on the basis of the VIE, a conclusion that has important implications for the interpretation of liquid-phase photoelectron spectroscopy. More generally, analysis of the simulation data suggests that the surface activity of soft anions is largely a second or third solvation shell effect, arising from disruption of water-water hydrogen bonds and not from significant changes in first-shell anion-water hydrogen bonding.
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Affiliation(s)
- Suranjan K Paul
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - John M Herbert
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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6
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Cunha LA, Lee J, Hait D, McCurdy CW, Head-Gordon M. Exploring spin symmetry-breaking effects for static field ionization of atoms: Is there an analog to the Coulson-Fischer point in bond dissociation? J Chem Phys 2021; 155:014309. [PMID: 34241406 DOI: 10.1063/5.0054387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Löwdin's symmetry dilemma is an ubiquitous issue in approximate quantum chemistry. In the context of Hartree-Fock (HF) theory, the use of Slater determinants with some imposed constraints to preserve symmetries of the exact problem may lead to physically unreasonable potential energy surfaces. On the other hand, lifting these constraints leads to the so-called broken symmetry solutions that usually provide better energetics, at the cost of losing information about good quantum numbers that describe the state of the system. This behavior has previously been extensively studied in the context of bond dissociation. This paper studies the behavior of different classes of HF spin polarized solutions (restricted, unrestricted, and generalized) in the context of ionization by strong static electric fields. We find that, for simple two electron systems, unrestricted Hartree-Fock (UHF) is able to provide a qualitatively good description of states involved during the ionization process (neutral, singly ionized, and doubly ionized states), whereas RHF fails to describe the singly ionized state. For more complex systems, even though UHF is able to capture some of the expected characteristics of the ionized states, it is constrained to a single Ms (diabatic) manifold in the energy surface as a function of field intensity. In this case, a better qualitative picture can be painted by using generalized Hartree-Fock as it is able to explore different spin manifolds and follow the lowest solution due to lack of collinearity constraints on the spin quantization axis.
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Affiliation(s)
- Leonardo A Cunha
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Joonho Lee
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Diptarka Hait
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - C William McCurdy
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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7
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Paradzinsky M, Troya D, Tanko JM. Insight into Hydrogen Abstractions by Nitrate Radical: Structural, Solvent Effects, and Evidence for a Polar Transition State. J Phys Chem A 2021; 125:5471-5480. [PMID: 34157229 DOI: 10.1021/acs.jpca.1c01726] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The role of a polarized transition state and solvent effects on nitrate radical reactions was examined with a previously under-reported class of substrates, ethers, for their atmospheric implications. Absolute rate constants for hydrogen abstraction from a series of alcohols, ethers, and alkanes by nitrate radical have been measured in acetonitrile, water, and mixtures of these two solvents. Across all of these classes of compounds, using a modified form of the Evans-Polanyi relationship, it is demonstrated that the observed structure/reactivity trends can be reconciled by considering the number of abstractable hydrogens, strength of the C-H bond, and ionization potential (IP) of the substrate. Hydrogen abstractions by nitrate radical occur with low selectivity and are characterized by an early transition state (α ≈ 0.3). The dependence of the rate constant on IP suggests a polar transition state with some degree (<10%) of charge transfer. These conclusions stand for reactions conducted in solution (CH3CN and H2O) as well as gas-phase values. Because of this polar transition state, the rate constants increase going from the gas phase to a polar solvent, and the magnitude of the increase is consistent with Kirkwood theory.
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Affiliation(s)
- Mark Paradzinsky
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Diego Troya
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - James M Tanko
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
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8
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Viel A, Williams DMG, Eisfeld W. Accurate quantum dynamics simulation of the photodetachment spectrum of the nitrate anion (NO 3 -) based on an artificial neural network diabatic potential model. J Chem Phys 2021; 154:084302. [PMID: 33639724 DOI: 10.1063/5.0039503] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The photodetachment spectrum of the nitrate anion (NO3 -) is simulated from first principles using wavepacket quantum dynamics propagation and a newly developed accurate full-dimensional fully coupled five state diabatic potential model. This model utilizes the recently proposed complete nuclear permutation inversion invariant artificial neural network diabatization technique [D. M. G. Williams and W. Eisfeld, J. Phys. Chem. A 124, 7608 (2020)]. The quantum dynamics simulations are designed such that temperature effects and the impact of near threshold detachment are taken into account. Thus, the two available experiments at high temperature and at cryogenic temperature using the slow electron velocity-map imaging technique can be reproduced in very good agreement. These results clearly show the relevance of hot bands and vibronic coupling between the X̃ 2A2 ' ground state and the B̃ 2E' excited state of the neutral radical. This together with the recent experiment at low temperature gives further support for the proper assignment of the ν3 fundamental, which has been debated for many years. An assignment of a not yet discussed hot band line is also proposed.
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Affiliation(s)
- Alexandra Viel
- University Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, FranceTheoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
| | - David M G Williams
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
| | - Wolfgang Eisfeld
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
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9
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Dutta J, Mukherjee S, Naskar K, Ghosh S, Mukherjee B, Ravi S, Adhikari S. The role of electron-nuclear coupling on multi-state photoelectron spectra, scattering processes and phase transitions. Phys Chem Chem Phys 2020; 22:27496-27524. [PMID: 33283826 DOI: 10.1039/d0cp04052e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present first principle based beyond Born-Oppenheimer (BBO) theory and its applications on various models as well as realistic spectroscopic and scattering processes, where the Jahn-Teller (JT) theory is brought in conjunction with the BBO approach on the phase transition of lanthanide complexes. Over one and half decades, our development of BBO theory is demonstrated with ab initio calculations on representative molecules of spectroscopic interest (NO2 radical, Na3 and K3 clusters, NO3 radical, C6H6+ and 1,3,5-C6H3F3+ radical cations) as well as triatomic reactive scattering processes (H+ + H2 and F + H2). Such an approach exhibits the effect of JT, Renner-Teller (RT) and pseudo Jahn-Teller (PJT) type of interactions. While implementing the BBO theory, we generate highly accurate diabatic potential energy surfaces (PESs) to carry out quantum dynamics calculation and find excellent agreement with experimental photoelectron spectra of spectroscopic systems and cross-sections/rate constants of scattering processes. On the other hand, such electron-nuclear couplings incorporated through JT theory play a crucial role in dictating higher energy satellite transitions in the dielectric function spectra of the LaMnO3 complex. Overall, this article thoroughly sketches the current perspective of the BBO approach and its connection with JT theory with various applications on physical and chemical processes.
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Affiliation(s)
- Joy Dutta
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
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10
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Antonsen S, Bunkan AJC, Mikoviny T, Nielsen CJ, Stenstrøm Y, Wisthaler A, Zardin E. Atmospheric Chemistry of Methyl Isocyanide-An Experimental and Theoretical Study. J Phys Chem A 2020; 124:6562-6571. [PMID: 32663395 PMCID: PMC7458469 DOI: 10.1021/acs.jpca.0c05127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/14/2020] [Indexed: 11/28/2022]
Abstract
The reaction of CH3NC with OH radicals was studied in smog chamber experiments employing PTR-ToF-MS and long-path FTIR detection. The rate coefficient was determined to be kCH3NC+OH = (7.9 ± 0.6) × 10-11 cm3 molecule-1 s-1 at 298 ± 3 K and 1013 ± 10 hPa; methyl isocyanate was the sole observed product of the reaction. The experimental results are supported by CCSD(T*)-F12a/aug-cc-pVTZ//M06-2X/aug-cc-pVTZ quantum chemistry calculations showing the reaction to proceed primarily via electrophilic addition to the isocyanide carbon atom. On the basis of the quantum chemical data, the kinetics of the OH reaction was simulated using a master equation model revealing the rate coefficient to be nearly independent of pressure at tropospheric conditions and having a negative temperature dependence with kOH = 4.2 × 10-11 cm3 molecule-1 s-1 at 298 K. Additional quantum chemistry calculations on the CH3NC reactions with O3 and NO3 show that these reactions are of little importance under atmospheric conditions. The atmospheric fate of methyl isocyanide is discussed.
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Affiliation(s)
| | - Arne Joakim C. Bunkan
- Section
for Environmental Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033
− Blindern, 0315 Oslo, Norway
| | - Tomas Mikoviny
- Section
for Environmental Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033
− Blindern, 0315 Oslo, Norway
| | - Claus J. Nielsen
- Section
for Environmental Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033
− Blindern, 0315 Oslo, Norway
| | - Yngve Stenstrøm
- Department
of Chemistry, Biotechnology and Food Science, P.O. Box 5003, NO-1432 Aas, Norway
| | - Armin Wisthaler
- Section
for Environmental Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033
− Blindern, 0315 Oslo, Norway
| | - Erika Zardin
- Section
for Environmental Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033
− Blindern, 0315 Oslo, Norway
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11
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Williams DMG, Eisfeld W. Complete Nuclear Permutation Inversion Invariant Artificial Neural Network (CNPI-ANN) Diabatization for the Accurate Treatment of Vibronic Coupling Problems. J Phys Chem A 2020; 124:7608-7621. [DOI: 10.1021/acs.jpca.0c05991] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David M. G. Williams
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
| | - Wolfgang Eisfeld
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
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12
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Antonsen SG, Bunkan AJC, Mikoviny T, Nielsen CJ, Stenstrøm Y, Wisthaler A, Zardin E. Atmospheric chemistry of diazomethane – an experimental and theoretical study. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1718227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | | | - Tomas Mikoviny
- Department of Chemistry, University of Oslo, Oslo, Norway
| | | | - Yngve Stenstrøm
- Department of Chemistry, Biotechnology and Food Science, Aas, Norway
| | | | - Erika Zardin
- Department of Chemistry, University of Oslo, Oslo, Norway
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13
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Kalemos A. The nature of the chemical bond in NO3, neutral and anion. Theor Chem Acc 2020. [DOI: 10.1007/s00214-020-2563-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Naskar K, Mukherjee S, Mukherjee B, Ravi S, Mukherjee S, Sardar S, Adhikari S. ADT: A Generalized Algorithm and Program for Beyond Born–Oppenheimer Equations of “N” Dimensional Sub-Hilbert Space. J Chem Theory Comput 2020; 16:1666-1680. [DOI: 10.1021/acs.jctc.9b00948] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Koushik Naskar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Soumya Mukherjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Bijit Mukherjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Satyam Ravi
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Saikat Mukherjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Subhankar Sardar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
- Department of Chemistry, Bhatter College, Dantan, Paschim Medinipur 721426, India
| | - Satrajit Adhikari
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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15
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Williams DMG, Viel A, Eisfeld W. Diabatic neural network potentials for accurate vibronic quantum dynamics—The test case of planar NO3. J Chem Phys 2019; 151:164118. [DOI: 10.1063/1.5125851] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- David M. G. Williams
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
| | - Alexandra Viel
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France
| | - Wolfgang Eisfeld
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
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16
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Mukherjee B, Naskar K, Mukherjee S, Ghosh S, Sahoo T, Adhikari S. Beyond Born–Oppenheimer theory for spectroscopic and scattering processes. INT REV PHYS CHEM 2019. [DOI: 10.1080/0144235x.2019.1672987] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Bijit Mukherjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India
| | - Koushik Naskar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India
| | - Soumya Mukherjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India
| | - Sandip Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India
| | - Tapas Sahoo
- Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada
| | - Satrajit Adhikari
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India
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17
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Sharma K, Garner S, Miller TA, Stanton JF. First-Principles Calculation of Jahn–Teller Rotational Distortion Parameters. J Phys Chem A 2019; 123:4990-5004. [DOI: 10.1021/acs.jpca.9b03360] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ketan Sharma
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Scott Garner
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Terry A. Miller
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - John F. Stanton
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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18
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Mukherjee S, Mukherjee B, Sardar S, Adhikari S. Extended Born-Oppenheimer equations for non-Abelian situations: A study on NO3 radical and 1,3,5-C6H3F3+ radical cation. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Williams DMG, Eisfeld W. Neural network diabatization: A new ansatz for accurate high-dimensional coupled potential energy surfaces. J Chem Phys 2018; 149:204106. [DOI: 10.1063/1.5053664] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- David M. G. Williams
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
| | - Wolfgang Eisfeld
- Theoretische Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
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20
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Mukherjee B, Mukherjee S, Sardar S, Shamasundar K, Adhikari S. A beyond Born-Oppenheimer treatment of five state molecular system NO3 and the photodetachment spectra of its anion. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.09.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Mukherjee S, Mukherjee B, Dutta J, Sardar S, Adhikari S. Topological Effects in Vibronically Coupled Degenerate Electronic States: A Case Study on Nitrate and Benzene Radical Cation. ACS OMEGA 2018; 3:12465-12475. [PMID: 31457977 PMCID: PMC6644592 DOI: 10.1021/acsomega.8b01648] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 09/12/2018] [Indexed: 06/10/2023]
Abstract
We carry out detailed investigation for topological effects of two molecular systems, NO3 radical and C6H6 + (Bz+) radical cation, where the dressed adiabatic, dressed diabatic, and adiabatic-via-dressed diabatic potential energy curves (PECs) are generated employing ab initio calculated adiabatic and diabatic potential energy surfaces (PESs). We have implemented beyond Born-Oppenheimer (BBO) theory for constructing smooth, single-valued, and continuous diabatic PESs for five coupled electronic states [J. Phys. Chem. A 2017, 121, 6314-6326]. In the case of NO3 radical, the nonadiabatic coupling terms (NACTs) among the low-lying five electronic states, namely, X̃ 2A2 ' (12B2), A~ 2E″ (12A2 and 12B1), and B~ 2E' (12A1 and 22B2), bear the signature of Jahn-Teller (JT) interactions, pseudo JT (PJT) interactions, and accidental conical intersections (CIs). Similarly, Bz+ radical cation also exhibits JT, PJT, and accidental CIs in the interested domain of nuclear configuration space. In order to generate dressed PECs, two components of degenerate in-plane asymmetric stretching modes are selectively chosen for both the molecular species (Q 3x -Q 3y pair for NO3 radical and Q 16x -Q 16y pair for Bz+ radical cation). The JT coupling between the electronic states is essentially originated through the asymmetric stretching normal mode pair, where the coupling elements exhibit symmetric and nonlinear functional behavior along Q 3x and Q 16x normal modes.
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Affiliation(s)
- Soumya Mukherjee
- Department
of Physical Chemistry, Indian Association
for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Bijit Mukherjee
- Department
of Physical Chemistry, Indian Association
for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Joy Dutta
- Department
of Physical Chemistry, Indian Association
for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Subhankar Sardar
- Department
of Chemistry, Bhatter College, Dantan, Paschim Medinipur, 721426, India
| | - Satrajit Adhikari
- Department
of Physical Chemistry, Indian Association
for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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Lischka H, Nachtigallová D, Aquino AJA, Szalay PG, Plasser F, Machado FBC, Barbatti M. Multireference Approaches for Excited States of Molecules. Chem Rev 2018; 118:7293-7361. [DOI: 10.1021/acs.chemrev.8b00244] [Citation(s) in RCA: 197] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hans Lischka
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P.R. China
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, 1090 Vienna, Austria
| | - Dana Nachtigallová
- Institute of Organic Chemistry and Biochemistry v.v.i., The Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
- Regional Centre of Advanced Technologies and Materials, Palacký University, 78371 Olomouc, Czech Republic
| | - Adélia J. A. Aquino
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P.R. China
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
- Institute for Soil Research, University of Natural Resources and Life Sciences Vienna, Peter-Jordan-Strasse 82, A-1190 Vienna, Austria
| | - Péter G. Szalay
- ELTE Eötvös Loránd University, Laboratory of Theoretical Chemistry, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Felix Plasser
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, 1090 Vienna, Austria
- Department of Chemistry, Loughborough University, Leicestershire LE11 3TU, United Kingdom
| | - Francisco B. C. Machado
- Departamento de Química, Instituto Tecnológico de Aeronáutica, São José dos Campos 12228-900, São Paulo, Brazil
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23
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Seifert NA, Zaleski DP, Fehnel R, Goswami M, Pate BH, Lehmann KK, Leung HO, Marshall MD, Stanton JF. The gas-phase structure of the asymmetric, trans-dinitrogen tetroxide (N 2O 4), formed by dimerization of nitrogen dioxide (NO 2), from rotational spectroscopy and ab initio quantum chemistry. J Chem Phys 2018; 146:134305. [PMID: 28390374 DOI: 10.1063/1.4979182] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report the first experimental gas-phase observation of an asymmetric, trans-N2O4 formed by the dimerization of NO2. In additional to the dominant 14N216O4 species, rotational transitions have been observed for all species with single 15N and 18O substitutions as well as several multiply substituted isotopologues. These transitions were used to determine a complete substitution structure as well as an r0 structure from the fitted zero-point averaged rotational constants. The determined structure is found to be that of an ON-O-NO2 linkage with the shared oxygen atom closer to the NO2 than the NO (1.42 vs 1.61 Å). The structure is found to be nearly planar with a trans O-N-O-N linkage. From the spectra of the 14N15NO4 species, we were able to determine the nuclear quadrupole coupling constants for each specific nitrogen atom. The equilibrium structure determined by ab initio quantum chemistry calculations is in excellent agreement with the experimentally determined structure. No spectral evidence of the predicted asymmetric, cis-N2O4 was found in the spectra.
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Affiliation(s)
- Nathan A Seifert
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22932, USA
| | - Daniel P Zaleski
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22932, USA
| | - Robert Fehnel
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22932, USADepartments of Chemistry and Physics, University of Virginia, Charlottesville, Virginia 22932, USADepartment of Chemistry, Amherst College, Amherst, Massachusetts 01002, USADepartment of Chemistry and Quantum Theory Project, University of Florida, Gainesville, Florida 32603, USA
| | - Mausumi Goswami
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22932, USA
| | - Brooks H Pate
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22932, USA
| | - Kevin K Lehmann
- Departments of Chemistry and Physics, University of Virginia, Charlottesville, Virginia 22932, USA
| | - Helen O Leung
- Department of Chemistry, Amherst College, Amherst, Massachusetts 01002, USA
| | - Mark D Marshall
- Department of Chemistry, Amherst College, Amherst, Massachusetts 01002, USA
| | - John F Stanton
- Department of Chemistry and Quantum Theory Project, University of Florida, Gainesville, Florida 32603, USA
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25
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Barbosa AGH, Henriques AM, Monteiro JGS, Fleming FP, Esteves PM. The multiconfiguration Spin-Coupled approach for the description of the three-center two-electron chemical bond of some carbenium and nonclassical ions. Theor Chem Acc 2018. [DOI: 10.1007/s00214-017-2193-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Molecular insights for the HFO-1345fz +X (X = Cl, O3 or NO3) reaction and fate of alkoxy radicals initiated by Cl: DFT investigations. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.08.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Isomer Identification in Flames with Double-Imaging Photoelectron/Photoion Coincidence Spectroscopy (i2PEPICO) using Measured and Calculated Reference Photoelectron Spectra. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/zpch-2017-1009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Double-imaging photoelectron/photoion coincidence (i2PEPICO) spectroscopy using a multiplexing, time-efficient, fixed-photon-energy approach offers important opportunities of gas-phase analysis. Building on successful applications in combustion systems that have demonstrated the discriminative power of this technique, we attempt here to push the limits of its application further to more chemically complex combustion examples. The present investigation is devoted to identifying and potentially quantifying compounds featuring five heavy atoms in laminar, premixed low-pressure flames of hydrocarbon and oxygenated fuels and their mixtures. In these combustion examples from flames of cyclopentene, iso-pentane, iso-pentane blended with dimethyl ether (DME), and diethyl ether (DEE), we focus on the unambiguous assignment and quantitative detection of species with the sum formulae C5H6, C5H7, C5H8, C5H10, and C4H8O in the respective isomer mixtures, attempting to provide answers to specific chemical questions for each of these examples. To analyze the obtained i2PEPICO results from these combustion situations, photoelectron spectra (PES) from pure reference compounds, including several examples previously unavailable in the literature, were recorded with the same experimental setup as used in the flame measurements. In addition, PES of two species where reference spectra have not been obtained, namely 2-methyl-1-butene (C5H10) and the 2-cyclopentenyl radical (C5H7), were calculated on the basis of high-level ab initio calculations and Franck-Condon (FC) simulations. These reference measurements and quantum chemical calculations support the early fuel decomposition scheme in the cyclopentene flame towards 2-cyclopentenyl as the dominant fuel radical as well as the prevalence of branched intermediates in the early fuel destruction reactions in the iso-pentane flame, with only minor influences from DME addition. Furthermore, the presence of ethyl vinyl ether (EVE) in DEE flames that was predicted by a recent DEE combustion mechanism could be confirmed unambiguously. While combustion measurements using i2PEPICO can be readily obtained in isomer-rich situations, we wish to highlight the crucial need for high-quality reference information to assign and evaluate the obtained spectra.
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Mukherjee S, Mukherjee B, Adhikari S. Five Electronic State Beyond Born-Oppenheimer Equations and Their Applications to Nitrate and Benzene Radical Cation. J Phys Chem A 2017; 121:6314-6326. [PMID: 28735536 DOI: 10.1021/acs.jpca.7b04592] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present explicit form of Adiabatic to Diabatic Transformation (ADT) equations and expressions of non-adiabatic coupling terms (NACTs) for a coupled five-state electronic manifold in terms of ADT angles between electronic wave functions. ADT matrices eliminate the numerical instability arising from singularity of NACTs and transform the adiabatic Schrödinger equation to its diabatic form. Two real molecular systems NO3 and C6H6+ (Bz+) are selectively chosen for the demonstration of workability of those equations. We examine the NACTs among the lowest five electronic states of the NO3 radical [X̃2A2' (12B2), Ã2E″ (12A2 and 12B1) and B̃2E' (12A1 and 22B2)], in which all types of non-adiabatic interactions, that is, Jahn-Teller (JT) interactions, Pseudo Jahn-Teller (PJT) interactions, and accidental conical intersections (CIs) are present. On the other hand, lowest five electronic states of Bz+ [X̃2E1g (12B3g and 12B2g), B̃2E2g (12Ag and 12B1g), and C̃2A2u (12B1u)] depict similar kind of complex feature of non-adiabatic effects. For NO3 radical, the two components of degenerate in-plane asymmetric stretching mode are taken as a plane of nuclear configuration space (CS), whereas in case of Bz+, two pairs are chosen: One is the pair of components of degenerate in-plane asymmetric stretching mode, and the other one is constituted with one of the components each from out-of-plane degenerate bend and in-plane degenerate asymmetric stretching modes. We calculate ab initio adiabatic potential energy surfaces (PESs) and NACTs among the lowest five electronic states at the CASSCF level using MOLPRO quantum chemistry package. Subsequently, the ADT is performed using those newly developed equations to validate the positions of the CIs, evaluate the ADT angles and construct smooth, symmetric, and continuous diabatic PESs for both the molecular systems.
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Affiliation(s)
- Soumya Mukherjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700 032, India
| | - Bijit Mukherjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700 032, India
| | - Satrajit Adhikari
- Department of Physical Chemistry, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700 032, India
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Mukherjee B, Mukherjee S, Sardar S, Shamasundar KR, Adhikari S. An ab initio investigation of non-adiabatic couplings and conical intersections among the lowest five electronic states of the NO3 radical. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1340680] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Bijit Mukherjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
| | - Saikat Mukherjee
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
| | - Subhankar Sardar
- Department of Chemistry, Bhatter College, Paschim Midnapore, India
| | - K. R. Shamasundar
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohali, India
| | - Satrajit Adhikari
- Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
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30
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Eisfeld W, Viel A. Vibronic eigenstates and the geometric phase effect in the2E″ state of NO3. J Chem Phys 2017; 146:034303. [DOI: 10.1063/1.4973983] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Nakanishi R, Kato S, Matsuyama Y, Nagata T. Photoelectron Spectroscopy and Ab Initio Calculations of CS3(-) Isomers: Carbon Trisulfide and Carbon Disulfide S-Sulfide Anions. J Phys Chem A 2016; 120:6956-62. [PMID: 27533492 DOI: 10.1021/acs.jpca.6b06900] [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
Carbon sulfides are known as a class of binary compounds that can exist in various isomeric and/or polymeric forms. As for a sulfur-rich compound with the composition formula CS3, two possible constitutional isomers have been proposed experimentally or theoretically for the neutral species and its corresponding radical cation and anion. Although the previous studies claim that one isomer has a carbon trisulfide (CS3) C-centered configuration and the other has a carbon disulfide S-sulfide (SCSS) chain configuration, they have not yet been fully identified by a spectroscopic method. In this study, we have prepared the anions of those isomers in the gas phase by employing two types of reactions: dissociative electron attachment to 1,3-dithiole-2-thione for CS3(-) formation and the S(-) + CS2 ion-molecule reaction for SCSS(-). Photoelectron spectroscopic measurements reveal that the reactions result in the production of two anionic species that can be well distinguished by their vertical detachment energy. With the aid of ab initio calculations, they are identified distinctively as the anions of carbon trisulfide and carbon disulfide S-sulfide.
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Affiliation(s)
- Ryuzo Nakanishi
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo , Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Shugo Kato
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo , Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Yasushi Matsuyama
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo , Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Takashi Nagata
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo , Komaba, Meguro-ku, Tokyo 153-8902, Japan
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32
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Maguta MM, Stenstrøm Y, Nielsen CJ. Kinetic and Theoretical Study of the Nitrate (NO3) Radical Gas Phase Reactions with N-Nitrosodimethylamine and N-Nitrosodiethylamine. J Phys Chem A 2016; 120:6970-7. [DOI: 10.1021/acs.jpca.6b05440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mihayo Musabila Maguta
- Division
of Agro-Processing Technologies and Industrial Chemistry, Tanzania Industrial Research and Development Organization (TIRDO), P.O. Box 23235, Dar es
Salaam, Tanzania
| | - Yngve Stenstrøm
- Department
of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Aas, Norway
| | - Claus J. Nielsen
- Department
of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
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33
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Sklenak S, Hrušák J. CuNO2 and Cu(+)NO2 Revisited: A Comparative ab Initio and DFT Study. J Chem Theory Comput 2015; 2:997-1008. [PMID: 26633059 DOI: 10.1021/ct0502007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We have reinvestigated CuNO2 and Cu(+)NO2 at ab initio as well as at pure and hybrid DFT levels of approximation employing large ANO basis sets. The systems were fully optimized using the CCSD(T), QCISD(T), BPW91, PBE, PBE0, and B3LYP methods. Several stationary points (minima and transition structures) were found on the related potential energy surfaces (PES). The C2v bidentate η(2)-O,O isomer is calculated to be the most stable species on the CuNO2 PES, followed by two monodentate isomers [Formula: see text] the Cs η(1)-O and C2v η(1)-N species which are higher in energy by 12 and 14 kcal/mol, respectively, at CCSD(T)/Basis-II (where Basis-II is 21s15p10d6f4g/8s7p5d3f2g for Cu; 14s9p4d3f/5s4p3d2f for O and N). On the Cu(+)NO2 PES, the Cs monodentate η(1)-O trans (0 kcal/mol) and cis (+3 kcal/mol at CCSD(T)/Basis-II) isomers are found, followed by the C2v monodentate η(1)-N isomer (+14 kcal/mol at CCSD/Basis-II). In contrast to the pure DFT, the hybrid DFT methods perform reasonably well for predicting the relative stabilities (except for η(1)-N of CuNO2) and structures; however, their predictions of the bond dissociation energies are less reliable (for CuNO2 the difference is as much as 10 kcal/mol compared to the CCSD(T) values). The performance of the QCISD(T) method was analyzed, and, furthermore, the issue of symmetry breaking was investigated.
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Affiliation(s)
- Stepan Sklenak
- J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3, 18223 Prague, Czech Republic
| | - Jan Hrušák
- J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3, 18223 Prague, Czech Republic
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Hrovat DA, Hou GL, Chen B, Wang XB, Borden WT. Negative ion photoelectron spectroscopy confirms the prediction that D3h carbon trioxide (CO 3) has a singlet ground state. Chem Sci 2015; 7:1142-1150. [PMID: 29910870 PMCID: PMC5975725 DOI: 10.1039/c5sc03542b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Accepted: 11/02/2015] [Indexed: 12/01/2022] Open
Abstract
The CO3 radical anion (CO3˙–) has been formed by electrospraying carbonate dianion (CO32–) into the gas phase.
The CO3 radical anion (CO3˙–) has been formed by electrospraying carbonate dianion (CO32–) into the gas phase. The negative ion photoelectron (NIPE) spectrum of CO3˙– shows that, unlike the isoelectronic trimethylenemethane [C(CH2)3], D3h carbon trioxide (CO3) has a singlet ground state. From the NIPE spectrum, the electron affinity of D3h singlet CO3 was, for the first time, directly determined to be EA = 4.06 ± 0.03 eV, and the energy difference between the D3h singlet and the lowest triplet was measured as ΔEST = – 17.8 ± 0.9 kcal mol–1. B3LYP, CCSD(T), and CASPT2 calculations all find that the two lowest triplet states of CO3 are very close in energy, a prediction that is confirmed by the relative intensities of the bands in the NIPE spectrum of CO3˙–. The 560 cm–1 vibrational progression, seen in the low energy region of the triplet band, enables the identification of the lowest, Jahn–Teller-distorted, triplet state as 3A1, in which both unpaired electrons reside in σ MOs, rather than 3A2, in which one unpaired electron occupies the b2 σ MO, and the other occupies the b1 π MO.
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Affiliation(s)
- David A Hrovat
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , USA .
| | - Gao-Lei Hou
- Physical Sciences Division , Pacific Northwest National Laboratory , P. O. Box 999, MS K8-88 , Richland , WA 99352 , USA .
| | - Bo Chen
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , USA .
| | - Xue-Bin Wang
- Physical Sciences Division , Pacific Northwest National Laboratory , P. O. Box 999, MS K8-88 , Richland , WA 99352 , USA .
| | - Weston Thatcher Borden
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5017 , USA .
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Koyasu K, Ohtaki T, Bing J, Takahashi K, Misaizu F. Even-odd product variation of the C(n)(+) + D(2) (n = 4-9) reaction: complexity of the linear carbon cation electronic states. Phys Chem Chem Phys 2015; 17:24810-9. [PMID: 26344370 DOI: 10.1039/c5cp04480d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have studied reactions between linear Cn(+) (n = 4-9) and D2, using ion mobility mass spectrometry techniques and quantum chemical calculations in order to understand the complex reactivity of the linear cluster cations. Only linear CnD(+) products were observed for the odd (n = 5, 7, 9) linear clusters, while CnD2(+) was the main product for the even clusters. For the reaction rate constants determined for these two channels, we obtained the following two features: (1) the rate constant decreases with the size n, and (2) even-sized clusters have lower rate constants than neighboring odd-sized clusters. In the theoretical calculations using the CCSD(T) and B3LYP methods with the cc-pVTZ basis, we found that a low lying (2)Σ state in odd clusters may play an important role in these reactions. This opposes the previous interpretation that the (2)Πg/u state is the dominant electronic state for linear Cn(+) (n = 4-9) clusters. We showed that a barrierless radical abstraction forming CnD(+) occurs through a direct head on approach for the (2)Σ state Cn(+). In contrast, a carbene-like insertion forming CnD2(+) occurs through a sideways approach for the (2)Πg/u state Cn(+). We have concluded that the higher rate constants for the odd clusters come from the existence of symmetry broken (2)Σ states which are absent in even linear clusters.
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Affiliation(s)
- K Koyasu
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aoba, Aoba-ku, Sendai 980-8578, Japan.
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Dutta AK, Vaval N, Pal S. EOMIP-CCSD(2)*: An Efficient Method for the Calculation of Ionization Potentials. J Chem Theory Comput 2015; 11:2461-72. [DOI: 10.1021/ct500927h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Achintya Kumar Dutta
- Physical Chemistry Division, CSIR−National Chemical Laboratory, Pune-411008, India
| | - Nayana Vaval
- Physical Chemistry Division, CSIR−National Chemical Laboratory, Pune-411008, India
| | - Sourav Pal
- Physical Chemistry Division, CSIR−National Chemical Laboratory, Pune-411008, India
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37
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Maeda S, Taketsugu T, Ohno K, Morokuma K. From Roaming Atoms to Hopping Surfaces: Mapping Out Global Reaction Routes in Photochemistry. J Am Chem Soc 2015; 137:3433-45. [DOI: 10.1021/ja512394y] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Satoshi Maeda
- Department
of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Tetsuya Taketsugu
- Department
of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Koichi Ohno
- Graduate
School of Science, Tohoku University, Sendai 980-8578, Japan
- Institute for Quantum Chemical Exploration, Tokyo 108-0022, Japan
| | - Keiji Morokuma
- Fukui
Institute for Fundamental Chemistry, Kyoto University, Kyoto 606-8103, Japan
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38
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Ng M, Mok DKW, Lee EPF, Dyke JM. A theoretical study of the mechanism of the atmospherically relevant reaction of chlorine atoms with methyl nitrate, and calculation of the reaction rate coefficients at temperatures relevant to the troposphere. Phys Chem Chem Phys 2015; 17:7463-76. [DOI: 10.1039/c4cp06007e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Computed rate coefficients of the atmospherically important Cl + CH3ONO2 → HCl + CH2ONO2 reaction reported for the first time.
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Affiliation(s)
- Maggie Ng
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- Hong Kong
| | - Daniel K. W. Mok
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- Hong Kong
| | - Edmond P. F. Lee
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- Hong Kong
- School of Chemistry
| | - John M. Dyke
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
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Maeda S, Taketsugu T, Morokuma K, Ohno K. Anharmonic Downward Distortion Following for Automated Exploration of Quantum Chemical Potential Energy Surfaces. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140189] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Satoshi Maeda
- Department of Chemistry, Faculty of Science, Hokkaido University
| | | | - Keiji Morokuma
- Fukui Institute for Fundamental Chemistry, Kyoto University
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University
| | - Koichi Ohno
- Graduate School of Science, Tohoku University
- Institute for Quantum Chemical Exploration
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40
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Eisfeld W, Vieuxmaire O, Viel A. Full-dimensional diabatic potential energy surfaces including dissociation: The 2E″ state of NO3. J Chem Phys 2014; 140:224109. [DOI: 10.1063/1.4879655] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Dutta AK, Dar M, Vaval N, Pal S. Structure, stability, and properties of the trans peroxo nitrate radical: the importance of nondynamic correlation. J Phys Chem A 2014; 118:1350-62. [PMID: 24502288 DOI: 10.1021/jp409218c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a comparative single-reference and multireference coupled-cluster investigation on the structure, potential energy surface, and IR spectroscopic properties of the trans peroxo nitrate radical, one of the key intermediates in stratospheric NOX chemistry. The previous single-reference ab initio studies predicted an unbound structure for the trans peroxo nitrate radical. However, our Fock space multireference coupled-cluster calculation confirms a bound structure for the trans peroxo nitrate radical, in accordance with the experimental results reported earlier. Further, the analysis of the potential energy surface in FSMRCC method indicates a well-behaved minima, contrary to the shallow minima predicted by the single-reference coupled-cluster method. The harmonic force field analysis, of various possible isomers of peroxo nitrate also reveals that only the trans structure leads to the experimentally observed IR peak at 1840 cm(-1). The present study highlights the critical importance of nondynamic correlation in predicting the structure and properties of high-energy stratospheric NOx radicals.
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Affiliation(s)
- Achintya Kumar Dutta
- Physical Chemistry Division, CSIR-National Chemical Laboratory , Pune 411008, India
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42
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Anglada JM, Olivella S, Solé A. Atmospheric formation of the NO3 radical from gas-phase reaction of HNO3 acid with the NH2 radical: proton-coupled electron-transfer versus hydrogen atom transfer mechanisms. Phys Chem Chem Phys 2014; 16:19437-45. [DOI: 10.1039/c4cp02792b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The amidogen radical abstracts the hydrogen from nitric acid through a proton coupled electron transfer mechanism rather than by an hydrogen atom transfer process.
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Affiliation(s)
- Josep M. Anglada
- Departament de Química Biològica i Modelització Molecular
- (IQAC – CSIC)
- E-08034 Barcelona, Spain
| | - Santiago Olivella
- Departament de Química Biològica i Modelització Molecular
- (IQAC – CSIC)
- E-08034 Barcelona, Spain
| | - Albert Solé
- Departament de Química Física i Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- E-08028 Barcelona, Spain
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43
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Dutta AK, Vaval N, Pal S. Performance of the EOMIP-CCSD(2) Method for Determining the Structure and Properties of Doublet Radicals: A Benchmark Investigation. J Chem Theory Comput 2013; 9:4313-31. [DOI: 10.1021/ct400316m] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Achintya Kumar Dutta
- Physical Chemistry Division, CSIR-National Chemical Laboratory, Pune-411008, India
| | - Nayana Vaval
- Physical Chemistry Division, CSIR-National Chemical Laboratory, Pune-411008, India
| | - Sourav Pal
- Physical Chemistry Division, CSIR-National Chemical Laboratory, Pune-411008, India
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44
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Shu Y, Levine BG. Reducing the propensity for unphysical wavefunction symmetry breaking in multireference calculations of the excited states of semiconductor clusters. J Chem Phys 2013; 139:074102. [DOI: 10.1063/1.4817965] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Takematsu K, Eddingsaas NC, Robichaud DJ, Okumura M. Spectroscopic studies of the Jahn-Teller effect in the Ã2E″ state of the nitrate radical NO3. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.10.088] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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46
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47
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Xiao H, Maeda S, Morokuma K. Global ab Initio Potential Energy Surfaces for Low-Lying Doublet States of NO3. J Chem Theory Comput 2012; 8:2600-5. [DOI: 10.1021/ct3004035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongyan Xiao
- Fukui Institute for Fundamental
Chemistry, Kyoto University, 34-4 Takano
Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Satoshi Maeda
- Department of Chemistry, Faculty
of Science, Hokkaido University, Sapporo,
060-0810, Japan
| | - Keiji Morokuma
- Fukui Institute for Fundamental
Chemistry, Kyoto University, 34-4 Takano
Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
- Cherry L.
Emerson Center for Scientific
Computation and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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48
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Tentscher PR, Arey JS. Geometries and Vibrational Frequencies of Small Radicals: Performance of Coupled Cluster and More Approximate Methods. J Chem Theory Comput 2012; 8:2165-79. [DOI: 10.1021/ct300194x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Peter R. Tentscher
- Environmental
Chemistry Modeling
Laboratory, EPFL, Lausanne, Switzerland
| | - J. Samuel Arey
- Environmental
Chemistry Modeling
Laboratory, EPFL, Lausanne, Switzerland
- Swiss Federal Institute of Aquatic
Science and Technology (Eawag), Dübendorf, Switzerland
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49
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Han YK. Comment on “Dynamic factors in the reactions between the magic cluster Al13− and HCl/HI” by Q. H. Yuan, J. Li, and Z.-F. Liu, Phys. Chem. Chem. Phys., 2011, 13, 9871: a wavefunction instability problem. Phys Chem Chem Phys 2012; 14:6639-40; discussion 6641-2. [DOI: 10.1039/c2cp23908f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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50
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Grubb MP, Warter ML, North SW. Stereodynamics of multistate roaming. Phys Chem Chem Phys 2012; 14:6733-40. [DOI: 10.1039/c2cp40235a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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