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Tomeček J, Liddle ST, Kaltsoyannis N. Actinide-Actinide Bonding: Electron Delocalisation and σ-Aromaticity in the Tri-Thorium Cluster [{Th(η 8 -C 8 H 8 )(μ-Cl) 2 } 3 K 2 ]. Chemphyschem 2023; 24:e202300366. [PMID: 37366275 DOI: 10.1002/cphc.202300366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 06/28/2023]
Abstract
The tri-thorium cluster [{Th(η8 -C8 H8 )(μ3 -Cl)2 }3 {K(THF)2 }2 ]∞ (Nature 2021, 598, 72-75) was reported to feature intriguing σ-aromatic bonding between the thorium atoms, a mode of metal-metal bonding unique in the actinide series. However, the presence of this bonding motif has since been challenged by others. Here, we computationally explore electron delocalisation in a molecular cluster fragment of [{Th(η8 -C8 H8 )(μ3 -Cl)2 }3 {K(THF)2 }2 ]∞ and examine its responses to an applied magnetic field using a variety of methods. We also discuss the importance of the choice of basis set for the Th atoms and issues regarding locating QTAIM bond critical points. When taken together, the computed data consistently suggest the presence of delocalised Th-Th bonding and Th3 σ-aromaticity.
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Affiliation(s)
- Josef Tomeček
- Department of Chemistry and Centre for Radiochemistry Research, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, UK
| | - Stephen T Liddle
- Department of Chemistry and Centre for Radiochemistry Research, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, UK
| | - Nikolas Kaltsoyannis
- Department of Chemistry and Centre for Radiochemistry Research, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, UK
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2
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Grimsley HR, Mayhall NJ. New Local Explorations of the Unitary Coupled Cluster Energy Landscape. J Chem Theory Comput 2022; 18:7350-7358. [PMID: 36375209 DOI: 10.1021/acs.jctc.2c00751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The recent quantum information boom has effected a resurgence of interest in the unitary coupled cluster (UCC) theory. Our group's interest in local energy landscapes of unitary ansätze prompted us to investigate the classical approach of truncating the Taylor series expansion (instead of a perturbative expansion) of the UCC with singles and doubles (UCCSD) energy at the second order. This amounts to an approach where the electron correlation energy is estimated by taking a single Newton-Raphson step from Hartree-Fock toward UCCSD. Such an approach has been explored previously, but the accuracy was not extensively studied. In this paper, we investigate the performance and observe similar pathologies to the linearized coupled cluster with singles and doubles. We introduce the use of derivatives of order three or greater to help partially recover the variational lower bound of true UCCSD, restricting these derivatives to those of the "unmixed" category in order to simplify the model. By testing the approach on several potential energy surfaces and reaction energies, we find this "diagonal" approximation to higher order terms to be effective at reducing sensitivity near singularities for strongly correlated regimes, while not significantly diminishing the accuracy of weakly correlated systems.
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Affiliation(s)
- Harper R Grimsley
- Chemistry Department, Virginia Tech, Blacksburg, Virginia24061, United States
| | - Nicholas J Mayhall
- Chemistry Department, Virginia Tech, Blacksburg, Virginia24061, United States
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3
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Graneri MHV, Wild DA, McKinley AJ. Molecules of life: studying the interaction between water and phosphine in argon matrices. Phys Chem Chem Phys 2022; 24:22426-22430. [PMID: 36004581 DOI: 10.1039/d2cp03434d] [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 interaction between water and phosphine isolated in solid argon matrices has been investigated. Infrared spectra of matrices containing water and phosphine, as well as their deuterium and 18O isotopologues, revealed that a weak hydrogen bonded complex is formed, with an O-H⋯P bonding motif. This was supported by high level ab initio calculations, which predict a binding energy of only 5.1 kJ mol-1 (430 cm-1).
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Affiliation(s)
- Matthew H V Graneri
- School of Molecular Sciences, University of Western Australia, 35 Stirling Hwy, Crawley, WA, 6009, Australia.
| | - Duncan A Wild
- School of Molecular Sciences, University of Western Australia, 35 Stirling Hwy, Crawley, WA, 6009, Australia.
| | - Allan J McKinley
- School of Molecular Sciences, University of Western Australia, 35 Stirling Hwy, Crawley, WA, 6009, Australia.
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4
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Behnle S, Richter R, Völkl L, Idzko P, Förstner A, Bozkaya U, Fink RF. Accurate Property Prediction by Second Order Perturbation Theory: The REMP and OO-REMP Hybrids. J Chem Phys 2022; 157:104111. [DOI: 10.1063/5.0105628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The prediction of molecular properties such as equilibrium structures or vibrationalwavenumbers is a routine task in computational chemistry. If very high accuracy is required, however, the use of computationally demanding ab initio wavefunction methods is mandatory. We present property calculations utilizing the REMP and OO-REMP hybrid perturbation theories showing that with the latter approach, very accurate results are obtained at second order in perturbation theory. Specifically, equilibrium structures and harmonic vibrational wavenumbers as well as dipole moments of closed and open shell molecules were calculated and compared to the best available experimental results or very accurate calculations.OO-REMP is capable of predicting bond lengths of small closed and open shell molecules with an accuracy of 0.2 pm and 0.5 pm, respectively, often within the range of experimental uncertainty. Equilibrium harmonic vibrational wavenumbers are predicted with an accuracy better than 20 cm−1 . Dipole moments of small closed and open shell molecules are reproduced with a relative error of less than 3 %. Across all investigated properties it turns out that a 20 %:80 % MP:RE mixing ratio consistently provides the best results. This is in line with our previous findings featuring closed and open shell reaction energies.
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Affiliation(s)
- Stefan Behnle
- Fachbereich II Chemie, Eberhard Karls Universität Tübingen Fachbereich II Chemie, Germany
| | - Robert Richter
- Eberhard Karls Universitat Tubingen Fachbereich II Chemie, Germany
| | - Luca Völkl
- Eberhard Karls Universitat Tubingen Fachbereich II Chemie, Germany
| | - Paul Idzko
- Eberhard Karls Universitat Tubingen Fachbereich II Chemie, Germany
| | - André Förstner
- Eberhard Karls Universitat Tubingen Fachbereich II Chemie, Germany
| | - Uğur Bozkaya
- Department of Chemistry, Hacettepe University, Turkey
| | - Reinhold F Fink
- Institute of Physical and Theoretical Chemistry, Eberhard Karls Universität Tübingen Fachbereich II Chemie, Germany
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5
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Abraham V, Mayhall NJ. Coupled Electron Pair-Type Approximations for Tensor Product State Wave Functions. J Chem Theory Comput 2022; 18:4856-4864. [PMID: 35878319 DOI: 10.1021/acs.jctc.2c00589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Size extensivity, defined as the correct scaling of energy with system size, is a desirable property for any many-body method. Traditional configuration interaction (CI) methods are not size extensive, hence the error increases as the system gets larger. Coupled electron pair approximation (CEPA) methods can be constructed as simple extensions of a truncated CI that ensures size extensivity. One of the major issues with the CEPA and its variants is that singularities arise in the amplitude equations when the system starts to be strongly correlated. In this work, we extend the traditional Slater determinant based coupled electron pair approaches like CEPA-0, averaged coupled-pair functional, and average quadratic coupled-cluster to a new formulation based on tensor product states (TPS). We show that a TPS basis can often be chosen such that it removes the singularities that commonly destroy the accuracy of CEPA based methods. A suitable TPS representation can be formed by partitioning the system into separate disjoint clusters and forming the final wave function as the tensor product of the many body states of these clusters. We demonstrate the application of these methods on simple bond breaking systems such as CH4 and F2 where determinant based CEPA methods fail. We further apply the TPS-CEPA approach to stillbene isomerization and few planar π-conjugated systems. Overall, the results show that the TPS-CEPA method can remove the singularities and provide improved numerical results compared to common electronic structure methods.
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Affiliation(s)
- Vibin Abraham
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Nicholas J Mayhall
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24060, United States
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6
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Micro-solvation and counter ion effects on ionic reactions: Activation of potassium fluoride with 18-crown-6 and tert-butanol in aprotic solvents. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114211] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Datta D, Saitow M, Sandhöfer B, Neese F. 57Fe Mössbauer parameters from domain based local pair-natural orbital coupled-cluster theory. J Chem Phys 2020; 153:204101. [PMID: 33261496 DOI: 10.1063/5.0022215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report on applications of the domain based local pair-natural orbital (PNO) coupled-cluster method within the singles and doubles approximation (DLPNO-CCSD) to the calculation of 57Fe isomer shifts and quadrupole splittings in a small training set of iron complexes consisting of large molecular ligands and iron atoms in varying charge, spin, and oxidation states. The electron densities and electric field gradients needed for these calculations were obtained within the recently implemented analytic derivative scheme. A method for the direct treatment of scalar relativistic effects in the calculation of effective electron densities is described by using the first-order Douglas-Kroll-Hess Hamiltonian and a Gaussian charge distribution model for the nucleus. The performance of DLPNO-CCSD is compared with four modern-day density functionals, namely, RPBE, TPSS, B3LYP, and B2PLYP, as well as with the second-order Møller-Plesset perturbation theory. An excellent correlation between the calculated electron densities and the experimental isomer shifts is attained with the DLPNO-CCSD method. The correlation constant a obtained from the slope of the linear correlation plot is found to be ≈-0.31 a.u.3 mm s-1, which agrees very well with the experimental calibration constant α = -0.31 ± 0.04 a.u.3 mm s-1. This value of a is obtained consistently using both nonrelativistic and scalar relativistic DLPNO-CCSD electron densities. While the B3LYP and B2PLYP functionals achieve equally good correlation between theory and experiment, the correlation constant a is found to deviate from the experimental value. Similar trends are observed also for quadrupole splittings. The value of the nuclear quadrupole moment for 57Fe is estimated to be 0.15 b at the DLPNO-CCSD level. This is consistent with previous results and is here supported by a higher level of theory. The DLPNO-CCSD results are found to be insensitive to the intrinsic approximations in the method, in particular the PNO occupation number truncation error, while the results obtained with density functional theory (DFT) are found to depend on the choice of the functional. In a statistical sense, i.e., on the basis of the linear regression analysis, however, the accuracies of the DFT and DLPNO-CCSD results can be considered comparable.
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Affiliation(s)
- Dipayan Datta
- Department of Chemistry and Ames Laboratory, Iowa State University, 201 Spedding Hall, 2416 Pammel Drive, Ames, Iowa 50011-2416, USA
| | - Masaaki Saitow
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | | | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
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8
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Silva SL, Valle MS, Pliego JR. Nucleophilic Fluorination with KF Catalyzed by 18-Crown-6 and Bulky Diols: A Theoretical and Experimental Study. J Org Chem 2020; 85:15457-15465. [PMID: 33227195 DOI: 10.1021/acs.joc.0c02229] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The activation of potassium fluoride for nucleophilic fluorination of alkyl halides is an important challenge because of the high lattice energy of this salt and its low solubility in many polar aprotic solvents. Crown ethers have been used for increasing the solubilization of KF during several decades. Nevertheless, these macrocycles are not enough to produce a high reaction rate. In this work, theoretical methods were used for designing a synergic combination of bulky diols with crown ethers able to accelerate this kind of reaction. The calculations have predicted that the bulky diol 1,4-Bis(2-hydroxy-2-propyl)benzene, which has distant hydroxyl groups, is able to catalyze nucleophilic fluorination in combination with 18-crown-6 via two hydrogen bonds to the SN2 transition state. Experimental studies following the theoretical predictions have confirmed the catalytic effect and the estimated kinetic data point out that the bulky diol at 1 mol L-1 in combination with 18-crown-6 is able to produce an 18-fold increase in the reaction rate in relation to crown ether catalysis only. The reaction produces 46% yield of fluorination after 24 h at moderate temperature of 82 °C, with minimal formation of the side elimination product. Thus, this work presents an improved method for fluorination with KF salt.
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Affiliation(s)
- Samuel L Silva
- Departamento de Ciências Naturais, Universidade Federal de Säo Joäo del-Rei, Säo Joäo del-Rei, 36301-160 MG, Brazil
| | - Marcelo S Valle
- Departamento de Ciências Naturais, Universidade Federal de Säo Joäo del-Rei, Säo Joäo del-Rei, 36301-160 MG, Brazil
| | - Josefredo R Pliego
- Departamento de Ciências Naturais, Universidade Federal de Säo Joäo del-Rei, Säo Joäo del-Rei, 36301-160 MG, Brazil
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9
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Espinosa Ferao A, García Alcaraz A, Zaragoza Noguera S, Streubel R. Terminal Phosphinidene Complex Adducts with Neutral and Anionic O-Donors and Halides and the Search for a Differentiating Bonding Descriptor. Inorg Chem 2020; 59:12829-12841. [DOI: 10.1021/acs.inorgchem.0c01874] [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)
- Arturo Espinosa Ferao
- Departamento de Quı́mica Orgánica, Facultad de Quı́mica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Antonio García Alcaraz
- Departamento de Quı́mica Orgánica, Facultad de Quı́mica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Salvador Zaragoza Noguera
- Departamento de Quı́mica Orgánica, Facultad de Quı́mica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Rainer Streubel
- Institut für Anorganische Chemie, Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
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10
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Pathak H, Sato T, Ishikawa KL. Time-dependent optimized coupled-cluster method for multielectron dynamics. III. A second-order many-body perturbation approximation. J Chem Phys 2020; 153:034110. [DOI: 10.1063/5.0008789] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Himadri Pathak
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takeshi Sato
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Photon Science Center, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Research Institute for Photon Science and Laser Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kenichi L. Ishikawa
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Photon Science Center, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Research Institute for Photon Science and Laser Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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11
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Neese F, Wennmohs F, Becker U, Riplinger C. The ORCA quantum chemistry program package. J Chem Phys 2020; 152:224108. [DOI: 10.1063/5.0004608] [Citation(s) in RCA: 697] [Impact Index Per Article: 174.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Frank Neese
- Max Planck Institut für Kohlenforschung, Kaiser-Wilhelm Platz 1, D-45470 Mülheim an der Ruhr, Germany
- FAccTs GmbH, Rolandstr. 67, 50677 Köln, Germany
| | - Frank Wennmohs
- Max Planck Institut für Kohlenforschung, Kaiser-Wilhelm Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Ute Becker
- Max Planck Institut für Kohlenforschung, Kaiser-Wilhelm Platz 1, D-45470 Mülheim an der Ruhr, Germany
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12
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Sánchez HR. Calculation of the inner‐shell contribution to the correlation energy through DLPNO‐CEPA/1 and scaled same‐spin second‐order Møller–Plesset perturbation theory. J Comput Chem 2020; 41:1012-1017. [DOI: 10.1002/jcc.26147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/28/2019] [Accepted: 01/02/2020] [Indexed: 11/08/2022]
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13
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Pathak H, Sato T, Ishikawa KL. Time-dependent optimized coupled-cluster method for multielectron dynamics. II. A coupled electron-pair approximation. J Chem Phys 2020; 152:124115. [DOI: 10.1063/1.5143747] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Himadri Pathak
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takeshi Sato
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Photon Science Center, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Research Institute for Photon Science and Laser Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kenichi L. Ishikawa
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Photon Science Center, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Research Institute for Photon Science and Laser Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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14
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Espinosa Ferao A, Streubel R. 1,2-Thiaphosphetanes: The Quest for Wittig-Type Ring Cleavage, Rearrangement, and Sulfur Atom Transfer. Inorg Chem 2020; 59:3110-3117. [DOI: 10.1021/acs.inorgchem.9b03471] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arturo Espinosa Ferao
- Departamento de Quı́mica Orgánica, Facultad de Quı́mica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Rainer Streubel
- Institut für Anorganische Chemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
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15
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Espinosa Ferao A, García Alcaraz A. Benchmarking the inversion barriers in σ3λ3-phosphorus compounds: a computational study. NEW J CHEM 2020. [DOI: 10.1039/d0nj01237h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Benchmark study of three mechanisms for inversion at phosphorus, including parametric criteria for classification and analysis of factors affecting barriers.
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Affiliation(s)
- Arturo Espinosa Ferao
- Departamento de Química Orgánica
- Facultad de Química
- Campus de Espinardo
- Universidad de Murcia
- 30100 Murcia
| | - Antonio García Alcaraz
- Departamento de Química Orgánica
- Facultad de Química
- Campus de Espinardo
- Universidad de Murcia
- 30100 Murcia
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16
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Li RR, Hoffmann MR. On the development and implementation of multi-CPU parallel versions of accurate, general purpose, methods of multireference perturbation theories. ADVANCES IN QUANTUM CHEMISTRY 2020. [DOI: 10.1016/bs.aiq.2020.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Behnle S, Fink RF. REMP: A hybrid perturbation theory providing improved electronic wavefunctions and properties. J Chem Phys 2019; 150:124107. [PMID: 30927883 DOI: 10.1063/1.5086168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We propose a new perturbation theoretical approach to the electron correlation energy by choosing the zeroth order Hamiltonian as a linear combination of the corresponding "Retaining the Excitation degree" (RE) and the Møller-Plesset (MP) operators. In order to fulfill Kato cusp conditions, the RE and MP contributions are chosen to sum up to one. 15% ± 5% MP contribution is deduced to be in an optimal range from a fit of the first order REMP wavefunction to near full configuration interaction reference data. For closed shell systems, the same range of MP weights shows best performance for equilibrium bond distances and vibrational wavenumbers of diatomic molecules, the reaction energies in the spin component scaled MP2 fit set, the transition energies of the BHPERI test set, and the parameterized coupled cluster with singles and doubles (pCCSD) fit set. For these properties, REMP outperforms all other tested perturbation theories at second order and shows equal performance as the best coupled pair approaches or pCCSD methods as well as the best double hybrid density functionals. Furthermore, REMP is shown to fulfill all required fundamental boundary conditions of proper wavefunction based quantum chemical methods (unitary invariance and size consistency).
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Affiliation(s)
- Stefan Behnle
- Institute of Physical and Theoretical Chemistry, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany
| | - Reinhold F Fink
- Institute of Physical and Theoretical Chemistry, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany
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18
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Maganas D, Kowalska JK, Nooijen M, DeBeer S, Neese F. Comparison of multireference ab initio wavefunction methodologies for X-ray absorption edges: A case study on [Fe(II/III)Cl4]2–/1– molecules. J Chem Phys 2019; 150:104106. [DOI: 10.1063/1.5051613] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Dimitrios Maganas
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Joanna K. Kowalska
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Marcel Nooijen
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Serena DeBeer
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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19
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Affiliation(s)
- A. Laestadius
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Blindern, Oslo, Norway
| | - F. M. Faulstich
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Blindern, Oslo, Norway
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20
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Rey A, Espinosa Ferao A, Streubel R. Quantum Chemical Calculations on CHOP Derivatives-Spanning the Chemical Space of Phosphinidenes, Phosphaketenes, Oxaphosphirenes, and COP - Isomers. Molecules 2018; 23:E3341. [PMID: 30562997 PMCID: PMC6321265 DOI: 10.3390/molecules23123341] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 12/06/2018] [Accepted: 12/16/2018] [Indexed: 12/04/2022] Open
Abstract
After many decades of intense research in low-coordinate phosphorus chemistry, the advent of Na[OCP] brought new stimuli to the field of CHOP isomers and derivatives thereof. The present theoretical study at the CCSD(T)/def2-TZVPP level describes the chemical space of CHOP isomers in terms of structures and potential energy surfaces, using oxaphosphirene as the starting point, but also covering substituted derivatives and COP- isomers. Bonding properties of the P⁻C, P⁻O, and C⁻O bonds in all neutral and anionic isomeric species are discussed on the basis of theoretical calculations using various bond strengths descriptors such as WBI and MBO, but also the Lagrangian kinetic energy density per electron as well as relaxed force constants. Ring strain energies of the superstrained 1H-oxaphosphirene and its barely strained oxaphosphirane-3-ylidene isomer were comparatively evaluated with homodesmotic and hyperhomodesmotic reactions. Furthermore, first time calculation of the ring strain energy of an anionic ring is described for the case of oxaphosphirenide.
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Affiliation(s)
- Alicia Rey
- Department of Organic Chemistry, Faculty of Chemistry, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - Arturo Espinosa Ferao
- Department of Organic Chemistry, Faculty of Chemistry, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - Rainer Streubel
- Institut of Inorganic Chemistry, Rheinischen Friedrich-Wilhelms-Universiy of Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
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21
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Pisarev SA, Shulga DA, Palyulin VA, Zefirov NS. Lone pairs vs. covalent bonds: conformational effects in bicyclo[3.3.1]nonane derivatives. Struct Chem 2018. [DOI: 10.1007/s11224-018-1240-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Espinosa Ferao A. On the Mechanism of Trimethylphosphine-Mediated Reductive Dimerization of Ketones. Inorg Chem 2018; 57:8058-8064. [DOI: 10.1021/acs.inorgchem.7b02816] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arturo Espinosa Ferao
- Department of Organic Chemistry, Faculty of Chemistry, University of Murcia, Campus de Espinardo, 30071 Murcia, Spain
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23
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Margraf JT, Bartlett R. Communication: Coupled cluster and many-body perturbation theory for fractional charges and spins. J Chem Phys 2018; 148:221103. [DOI: 10.1063/1.5040164] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Johannes T. Margraf
- Chair for Theoretical Chemistry, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| | - Rodney Bartlett
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, USA
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24
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Ivanic J, Schmidt MW. Hybrid Correlation Energy (HyCE): An Approach Based on Separate Evaluations of Internal and External Components. J Phys Chem A 2018; 122:5223-5237. [DOI: 10.1021/acs.jpca.8b01794] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph Ivanic
- Advanced Biomedical Computational Sciences Group, Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute, Frederick, Maryland 21702, United States
| | - Michael W. Schmidt
- Department of Chemistry and Ames Laboratory (US-DOE), Iowa State University, Ames, Iowa 50011, United States
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25
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Valentine AJ, Mazziotti DA. Analytical nuclear derivatives for the parametric two-electron reduced density matrix method. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Espinosa Ferao A. Comparative Computational Study on the Reaction of Chloroacetone with Trimethylphosphite: Perkow versus Michaelis–Arbuzov Reaction Paths. J Phys Chem A 2017; 121:6517-6522. [DOI: 10.1021/acs.jpca.7b06262] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arturo Espinosa Ferao
- Departmento de Química
Orgánica, Universidad de Murcia, Campus de Espinardo, 30071 Murcia, Spain
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27
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Espinosa Ferao A, Streubel R. A Computational Study on the Stability of Oxaphosphirane Rings towards Closed-Shell Valence Isomerization. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700177] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Arturo Espinosa Ferao
- Departamento de Química Orgánica; Facultad de Química; Universidad de Murcia; Campus de Espinardo 30100 Murcia Spain
| | - Rainer Streubel
- Institut für Anorganische Chemie; Rheinischen Friedrich-Wilhelms-Universität Bonn; Gerhardt-Domagk-Strasse 1 53121 Bonn Germany
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28
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Espinosa Ferao A, Streubel R. Coordination of N2
and Other Small Molecules to the Phosphorus Centre of RPW(CO)5
: A Theoretical Study on the Janus Facets of the Stabilization/Activation Problem. Chemistry 2017; 23:8632-8643. [DOI: 10.1002/chem.201700524] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Arturo Espinosa Ferao
- Departamento de Química Orgánica, Facultad de Química; Universidad de Murcia; Campus de Espinardo 30100 Murcia Spain
| | - Rainer Streubel
- Institut für Anorganische Chemie; Rheinischen Friedrich-Wilhelms-Universität Bonn; Gerhardt-Domagk-Strasse 1 53121 Bonn Germany
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29
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Tsuchimochi T, Ten-no S. Bridging Single- and Multireference Domains for Electron Correlation: Spin-Extended Coupled Electron Pair Approximation. J Chem Theory Comput 2017; 13:1667-1681. [DOI: 10.1021/acs.jctc.7b00073] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Tsuchimochi
- Graduate
School of Science, Technology, and Innovation, and ‡Graduate School
of System Informatics, Kobe University, Kobe, Hyogo 657-0025, Japan
| | - Seiichiro Ten-no
- Graduate
School of Science, Technology, and Innovation, and ‡Graduate School
of System Informatics, Kobe University, Kobe, Hyogo 657-0025, Japan
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30
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Espinosa Ferao A, Streubel R. Thiaphosphiranes and Their Complexes: Systematic Study on Ring Strain and Ring Cleavage Reactions. Inorg Chem 2016; 55:9611-9619. [PMID: 27618483 DOI: 10.1021/acs.inorgchem.6b01322] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arturo Espinosa Ferao
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo 30100 Murcia, Spain
| | - Rainer Streubel
- Institut für Anorganische Chemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
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31
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Köppl C, Werner HJ. Parallel and Low-Order Scaling Implementation of Hartree–Fock Exchange Using Local Density Fitting. J Chem Theory Comput 2016; 12:3122-34. [DOI: 10.1021/acs.jctc.6b00251] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christoph Köppl
- Institut
für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Hans-Joachim Werner
- Institut
für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
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32
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Mullinax JW, Sokolov AY, Schaefer HF. Can density cumulant functional theory describe static correlation effects? J Chem Theory Comput 2016; 11:2487-95. [PMID: 26575548 DOI: 10.1021/acs.jctc.5b00346] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We evaluate the performance of density cumulant functional theory (DCT) for capturing static correlation effects. In particular, we examine systems with significant multideterminant character of the electronic wave function, such as the beryllium dimer, diatomic carbon, m-benzyne, 2,6-pyridyne, twisted ethylene, as well as the barrier for double-bond migration in cyclobutadiene. We compute molecular properties of these systems using the ODC-12 and DC-12 variants of DCT and compare these results to multireference configuration interaction and multireference coupled-cluster theories, as well as single-reference coupled-cluster theory with single, double (CCSD), and perturbative triple excitations [CCSD(T)]. For all systems the DCT methods show intermediate performance between that of CCSD and CCSD(T), with significant improvement over the former method. In particular, for the beryllium dimer, m-benzyne, and 2,6-pyridyne, the ODC-12 method along with CCSD(T) correctly predict the global minimum structures, while CCSD predictions fail qualitatively, underestimating the multireference effects. Our results suggest that the DC-12 and ODC-12 methods are capable of describing emerging static correlation effects but should be used cautiously when highly accurate results are required. Conveniently, the appearance of multireference effects in DCT can be diagnosed by analyzing the DCT natural orbital occupations, which are readily available at the end of the energy computation.
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Affiliation(s)
- J Wayne Mullinax
- Center for Computational Quantum Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Alexander Yu Sokolov
- Center for Computational Quantum Chemistry, University of Georgia , Athens, Georgia 30602, United States.,Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, University of Georgia , Athens, Georgia 30602, United States
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33
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García CM, Ferao AE, Schnakenburg G, Streubel R. CPh3 as a functional group in P-heterocyclic chemistry: elimination of HCPh3 in the reaction of P-CPh3 substituted Li/Cl phosphinidenoid complexes with Ph2CO. Dalton Trans 2016; 45:2378-85. [DOI: 10.1039/c5dt04595a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Li/Cl phosphinidenoid complexes 2a–c react with benzaldehyde to give 3a–c, but with benzophenone formation of complexes 4 and 5 was observed, the latter revealing the elimination of HCPh3.
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Affiliation(s)
- C. Murcia García
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- D-53121 Bonn
- Germany
| | - A. Espinosa Ferao
- Departamento de Química Orgánica
- Facultad de Química
- Universidad de Murcia
- E-30071 Murcia
- Spain
| | - G. Schnakenburg
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- D-53121 Bonn
- Germany
| | - R. Streubel
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- D-53121 Bonn
- Germany
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34
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Dalessandro EV, Collin HP, Valle MS, Pliego JR. Mechanism and free energy profile of base-catalyzed Knoevenagel condensation reaction. RSC Adv 2016. [DOI: 10.1039/c6ra10393f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A reliable theoretical calculation of the free energy profile of a base-catalyzed Knoevenagel reaction shows that hydroxide ion elimination step is rate determining.
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Affiliation(s)
- Ellen V. Dalessandro
- Departamento de Ciências Naturais
- Universidade Federal de São João del-Rei
- São João del-Rei
- Brazil
| | - Hugo P. Collin
- Departamento de Ciências Naturais
- Universidade Federal de São João del-Rei
- São João del-Rei
- Brazil
| | - Marcelo S. Valle
- Departamento de Ciências Naturais
- Universidade Federal de São João del-Rei
- São João del-Rei
- Brazil
| | - Josefredo R. Pliego
- Departamento de Ciências Naturais
- Universidade Federal de São João del-Rei
- São João del-Rei
- Brazil
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35
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Klein M, Schnakenburg G, Espinosa Ferao A, Streubel R. Rearrangement and deoxygenation of 3,3-bis(2-pyridyl)oxaphosphirane complexes. Dalton Trans 2016; 45:2085-94. [DOI: 10.1039/c5dt03404c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The reaction of Li/Cl phosphinidenoid pentacarbonylmetal(0) complexes with bis(2-pyridyl)ketone led to overcrowded oxaphosphirane derivatives. They can undergo deoxygenation by Ti(iii) reagents or ring expansion via P–C cleavage followed by P–N cyclization.
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Affiliation(s)
- Melina Klein
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- 53121 Bonn
- Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- 53121 Bonn
- Germany
| | - Arturo Espinosa Ferao
- Departamento de Química Orgánica. Facultad de Química. Universidad de Murcia
- 30100 Murcia
- Spain
| | - Rainer Streubel
- Institut für Anorganische Chemie
- Rheinische Friedrich-Wilhelms-Universität Bonn
- 53121 Bonn
- Germany
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36
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Copan AV, Sokolov AY, Schaefer HF. Benchmark Study of Density Cumulant Functional Theory: Thermochemistry and Kinetics. J Chem Theory Comput 2015; 10:2389-98. [PMID: 26580759 DOI: 10.1021/ct5002895] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present an extensive benchmark study of density cumulant functional theory (DCFT) for thermochemistry and kinetics of closed- and open-shell molecules. The performance of DCFT methods (DC-06, DC-12, ODC-06, and ODC-12) is compared to that of coupled-electron pair methods (CEPA0 and OCEPA0) and coupled-cluster theory (CCSD and CCSD(T)) for the description of noncovalent interactions (A24 database), barrier heights of hydrogen-transfer reactions (HTBH38), radical stabilization energies (RSE30), adiabatic ionization energies (AIE), and covalent bond stretching in diatomic molecules. Our results indicate that out of four DCFT methods the ODC-12 method is the most reliable and accurate DCFT formulation to date. Compared to CCSD, ODC-12 shows superior results for all benchmark tests employed in our study. With respect to coupled-pair theories, ODC-12 outperforms CEPA0 and shows similar accuracy to the orbital-optimized CEPA0 variant (OCEPA0) for systems at equilibrium geometries. For covalent bond stretching, ODC-12 is found to be more reliable than OCEPA0. For the RSE30 and AIE data sets, ODC-12 shows competitive performance with CCSD(T). In addition to benchmark results, we report new reference values for the RSE30 data set computed using coupled cluster theory with up to perturbative quadruple excitations.
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Affiliation(s)
- Andreas V Copan
- Center for Computational Quantum Chemistry, The University of Georgia , Athens, Georgia 30602, United States
| | - Alexander Yu Sokolov
- Center for Computational Quantum Chemistry, The University of Georgia , Athens, Georgia 30602, United States
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, The University of Georgia , Athens, Georgia 30602, United States
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37
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Klein M, Schnakenburg G, Espinosa Ferao A, Tokitoh N, Streubel R. Reactions of Li/Cl Phosphinidenoid Complexes with 1,3,4,5-Tetramethylimidazol-2-ylidene: A New Route to N-Heterocyclic Carbene Adducts of Terminal Phosphinidene Complexes and an Unprecedented Transformation of an Oxaphosphirane Complex. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500959] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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Pinski P, Riplinger C, Valeev EF, Neese F. Sparse maps—A systematic infrastructure for reduced-scaling electronic structure methods. I. An efficient and simple linear scaling local MP2 method that uses an intermediate basis of pair natural orbitals. J Chem Phys 2015. [DOI: 10.1063/1.4926879] [Citation(s) in RCA: 174] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Peter Pinski
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Christoph Riplinger
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Edward F. Valeev
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470 Mülheim an der Ruhr, Germany
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39
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Villalba Franco JM, Schnakenburg G, Sasamori T, Espinosa Ferao A, Streubel R. Stimuli-Responsive Frustrated Lewis-Pair-Type Reactivity of a Tungsten Iminoazaphosphiridine Complex. Chemistry 2015; 21:9650-5. [PMID: 26031623 DOI: 10.1002/chem.201501628] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Indexed: 11/09/2022]
Affiliation(s)
- José Manuel Villalba Franco
- Institut für Anorganische Chemie, Reinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany), Fax:(+49) 228-739616
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie, Reinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany), Fax:(+49) 228-739616
| | - Takahiro Sasamori
- Institut for Chemical Research, Kyoto University, Gokasho Uji, Kyoto, 611-0011 (Japan)
| | - Arturo Espinosa Ferao
- Departamento de Química Orgánica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia (Spain), Fax:(+34) 868-884149.
| | - Rainer Streubel
- Institut für Anorganische Chemie, Reinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany), Fax:(+49) 228-739616.
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40
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Sokolov AY, Schaefer HF, Kutzelnigg W. Density cumulant functional theory from a unitary transformation: N-representability, three-particle correlation effects, and application to O4(+). J Chem Phys 2015; 141:074111. [PMID: 25149779 DOI: 10.1063/1.4892946] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A new approach to density cumulant functional theory is developed that derives density cumulant N-representability conditions from an approximate Fock space unitary transformation. We present explicit equations for the third- and fourth-order two-particle cumulant N-representability, as well as the second-order contributions that depend on the connected three-particle density cumulant. These conditions are used to formulate the ODC-13 method and the non-iterative (λ3) correction that employ an incomplete description of the fourth-order two-particle cumulant N-representability and the second-order three-particle correlation effects, respectively. We perform an analysis of the ODC-13 N-representability description for the dissociation of H2 and apply the ODC-13 method and the (λ3) correction to diatomic molecules with multiple bond character and the symmetry-breaking tetraoxygen cation (O4(+)). For the O4(+) molecule, the vibrational frequencies of the ODC-13(λ3) method do not exhibit spatial symmetry breaking and are in a good agreement with the recent infrared photodissociation experiment. We report the O4(+) equilibrium structure, harmonic frequencies, and dissociation energy computed using ODC-13(λ3) with a diffuse, core-correlated aug-cc-pCVTZ basis set.
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Affiliation(s)
- Alexander Yu Sokolov
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | - Werner Kutzelnigg
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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41
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Chan B, Radom L. W2X and W3X-L: Cost-Effective Approximations to W2 and W4 with kJ mol–1 Accuracy. J Chem Theory Comput 2015; 11:2109-19. [DOI: 10.1021/acs.jctc.5b00135] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bun Chan
- School of Chemistry and ARC Centre
of Excellence for Free Radical Chemistry and Biotechnology, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Leo Radom
- School of Chemistry and ARC Centre
of Excellence for Free Radical Chemistry and Biotechnology, University of Sydney, Sydney, New South Wales 2006, Australia
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42
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Small DW, Sundstrom EJ, Head-Gordon M. Restricted Hartree Fock using complex-valued orbitals: A long-known but neglected tool in electronic structure theory. J Chem Phys 2015; 142:024104. [DOI: 10.1063/1.4905120] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- David W. Small
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Eric J. Sundstrom
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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43
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Ring- and side-group conformational properties of di-O-acylated xylopyranosides: A computational study. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2014.11.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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Alfonso M, Espinosa A, Tárraga A, Molina P. Multifunctional Benzothiadiazole-Based Small Molecules Displaying Solvatochromism and Sensing Properties toward Nitroarenes, Anions, and Cations. ChemistryOpen 2014; 3:242-9. [PMID: 25558442 PMCID: PMC4280823 DOI: 10.1002/open.201402022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Indexed: 11/10/2022] Open
Abstract
Aryl or heteroaryl 5-substituted imidazo-benzothiadiazole derivatives were synthesized and shown to display remarkable solvatofluorochromism and selectively sense mercury(II) cations, acetate anions, and nitroaromatic derivatives, with discrimination between p-nitrophenol and picric acid. These novel sensors are of importance these days, as the detection of explosives is a high priority in issues of national security and environmental protection. To determine the ion binding properties of the sensors, their absorption and fluorescence emission spectra upon binding different cations and anions were compared. Significant shifts in the spectra were only observed for mercury(II) and acetate. The binding of these two ions was further studied using (1)H NMR. The binding properties of different nitroaromatic compounds were also determined, and the results showed the importance of the presence of a phenol group in the guest molecule. Specifically, the two sensors were shown to discriminate between p-nitrophenol and picric acid. Finally, the mechanism of fluorescence quenching upon addition of nitrophenols was determined by computational methods.
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Affiliation(s)
- María Alfonso
- Departamento de Química Orgánica, Universidad de Murcia Campus de Espinardo, 30100 Murcia (Spain) E-mail:
| | - Arturo Espinosa
- Departamento de Química Orgánica, Universidad de Murcia Campus de Espinardo, 30100 Murcia (Spain) E-mail:
| | - Alberto Tárraga
- Departamento de Química Orgánica, Universidad de Murcia Campus de Espinardo, 30100 Murcia (Spain) E-mail:
| | - Pedro Molina
- Departamento de Química Orgánica, Universidad de Murcia Campus de Espinardo, 30100 Murcia (Spain) E-mail:
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45
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Teodoro TQ, Ferreira da Silva AB, Haiduke RLA. Relativistic Prolapse-Free Gaussian Basis Set of Quadruple-ζ Quality: (aug-)RPF-4Z. II. The d-Block Elements. J Chem Theory Comput 2014; 10:4761-4. [DOI: 10.1021/ct500804j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tiago Quevedo Teodoro
- Departamento de Química
e Física Molecular, Instituto de Química de São
Carlos, Universidade de São Paulo, Av. Trabalhador São-carlense
400, 13560-970 São
Carlos, SP, Brazil
| | - Albérico Borges Ferreira da Silva
- Departamento de Química
e Física Molecular, Instituto de Química de São
Carlos, Universidade de São Paulo, Av. Trabalhador São-carlense
400, 13560-970 São
Carlos, SP, Brazil
| | - Roberto Luiz Andrade Haiduke
- Departamento de Química
e Física Molecular, Instituto de Química de São
Carlos, Universidade de São Paulo, Av. Trabalhador São-carlense
400, 13560-970 São
Carlos, SP, Brazil
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46
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Yu F. Spin-Component-Scaled Double-Hybrid Density Functionals with Nonlocal van der Waals Correlations for Noncovalent Interactions. J Chem Theory Comput 2014; 10:4400-7. [DOI: 10.1021/ct500642x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Feng Yu
- Department of Physics, School
of Science, Xi’an Technological University, No. 4 Jinhua North Road, Xi’an, Shaanxi 710032, China
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47
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Jahangir S, Khan KM, Fabian WM. Absolute configuration of 1,5-diazepin-2-ones: A critical test case for density functional theory. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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48
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Sokolov AY, Schaefer HF. Orbital-optimized density cumulant functional theory. J Chem Phys 2014; 139:204110. [PMID: 24289347 DOI: 10.1063/1.4833138] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In density cumulant functional theory (DCFT) the electronic energy is evaluated from the one-particle density matrix and two-particle density cumulant, circumventing the computation of the wavefunction. To achieve this, the one-particle density matrix is decomposed exactly into the mean-field (idempotent) and correlation components. While the latter can be entirely derived from the density cumulant, the former must be obtained by choosing a specific set of orbitals. In the original DCFT formulation [W. Kutzelnigg, J. Chem. Phys. 125, 171101 (2006)] the orbitals were determined by diagonalizing the effective Fock operator, which introduces partial orbital relaxation. Here we present a new orbital-optimized formulation of DCFT where the energy is variationally minimized with respect to orbital rotations. This introduces important energy contributions and significantly improves the description of the dynamic correlation. In addition, it greatly simplifies the computation of analytic gradients, for which expressions are also presented. We offer a perturbative analysis of the new orbital stationarity conditions and benchmark their performance for a variety of chemical systems.
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Affiliation(s)
- Alexander Yu Sokolov
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, USA
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Espinosa A, de las Heras E, Streubel R. Oxaphosphirane-Borane Complexes: Ring Strain and Migratory Insertion/Ring-Opening Reactions. Inorg Chem 2014; 53:6132-40. [PMID: 24902079 DOI: 10.1021/ic500536h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Arturo Espinosa
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Edgar de las Heras
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain
| | - Rainer Streubel
- Institut für Anorganische Chemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str.
1, 53121 Bonn, Germany
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Soydaş E, Bozkaya U. Assessment of the orbital-optimized coupled-electron pair theory for thermochemistry and kinetics: Improving on CCSD and CEPA(1). J Comput Chem 2014; 35:1073-81. [DOI: 10.1002/jcc.23592] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/24/2014] [Accepted: 03/09/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Emine Soydaş
- Department of Chemistry; Atatürk University; Erzurum 25240 Turkey
| | - Uğur Bozkaya
- Department of Chemistry; Atatürk University; Erzurum 25240 Turkey
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