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Xu H, Wang B, Liao L, Wang Y, Zhu Q, Ren H. High-Throughput Predictions of Accurate Enthalpies of Formation for Larger Molecules Utilizing the Bond Difference Correction Method. J Phys Chem Lett 2024; 15:998-1005. [PMID: 38252697 DOI: 10.1021/acs.jpclett.3c03390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
The prediction of standard enthalpies of formation (EOFs) for larger molecules involves a trade-off between accuracy and cost, often resulting in non-negligible errors. The connectivity-based hierarchy (CBH) and simple bond additivity correction (BAC) are two promising means for evaluating EOFs, although they cannot achieve strict chemical accuracy. Calculated errors in the CBH are confirmed from accumulated systematic errors associated with bond differences in chemical environments. On the basis of a new set of bond descriptors, our developed bond difference correction (BDC) method effectively solves incremental errors with molecular size and inability applications for aromatic molecules. To balance the accuracy between non-aromatic and aromatic molecules, a more accurate BAC-based method with unpaired electrons and p hybrid orbitals (BAC-EP) is developed. With the incorporation of the two methods above, strict chemical accuracy by the largest deviation is achieved at low costs. These universal, ultrafast, and high-throughput methods greatly contribute to self-consistent thermodynamic parameters in combustion mechanisms.
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Affiliation(s)
- Huajie Xu
- Research Institute of Frontier Science, Southwest Jiao Tong University, Chengdu, Sichuan 610065, People's Republic of China
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Bo Wang
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Lingxian Liao
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Yang Wang
- Research Institute of Frontier Science, Southwest Jiao Tong University, Chengdu, Sichuan 610065, People's Republic of China
| | - Quan Zhu
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Haisheng Ren
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
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2
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Xu Z, Xu H, Liu L, Jiang R, Ren H, Li X. High-precision standard enthalpy of formation for polycyclic aromatic hydrocarbons predicting from general connectivity based hierarchy with discrete correction of atomization energy. Front Chem Sci Eng 2022. [DOI: 10.1007/s11705-022-2184-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Tetranitro-diazinodiazines as high energy materials: computational investigation of structural aspects of fused heterocyclic backbone and isomerism. Struct Chem 2021. [DOI: 10.1007/s11224-021-01791-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Xu S, Wang QD, Sun MM, Yin G, Liang J. Benchmark calculations for bond dissociation energies and enthalpy of formation of chlorinated and brominated polycyclic aromatic hydrocarbons. RSC Adv 2021; 11:29690-29701. [PMID: 35479574 PMCID: PMC9040899 DOI: 10.1039/d1ra05391d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 08/31/2021] [Indexed: 01/22/2023] Open
Abstract
Thermodynamic properties, i.e., bond dissociation energies and enthalpy of formation, of chlorinated and brominated polycyclic aromatic hydrocarbons play a fundamental role in understanding their formation mechanisms and reactivity. Computational electronic structure calculations routinely used to predict thermodynamic properties of various species are limited for these compounds due to large computational cost to obtain accurate results by employing high-level wave function theory methods. In this work, a number of composite model chemistry methods (CBS-QB3, G3MP2, G3, and G4) are used to compute bond dissociation energies and enthalpies of formation of small to medium-size chlorinated and brominated polycyclic aromatic hydrocarbon compounds. The enthalpy of formation is derived via the atomization method and compared against the recommended values. Statistical analysis indicates that G4 is the best method. For comparison, three commonly used density functional theory (DFT) methods (M06-2X, ωB97X-D and B2PLYP-D3) with various basis sets including 6-311++G(d, p), cc-pVTZ, and cc-pVQZ in the prediction of bond dissociation energies and enthalpies of formation have been tested using the optimized geometries at the same M06-2X/6-311++G(d, p) level of theory. It is found that ωB97X-D/6-311++G(d, p) shows the best performance in computing the bond dissociation energies, while ωB97X-D/cc-pVTZ exhibits the best prediction in enthalpy of formation of the studied reaction systems. The structural effect on the bond dissociation energies and enthalpy of formation of chlorinated and brominated polycyclic aromatic hydrocarbons are then systematically analyzed. Based on comparisons of the various methods, reliable DFT methods are recommended for future theoretical studies on large chlorinated and brominated polycyclic aromatic hydrocarbons considering both accuracy and computational cost. This work, to the authors' knowledge, is the first to systematically benchmark theoretical methods for the accurate prediction of thermodynamic properties for chlorinated and brominated polycyclic aromatic hydrocarbons. Benchmark calculations using state-of-the-art DFT functionals and composite methods for bond dissociation energy and enthalpy of formation of halogenated polycyclic aromatic hydrocarbons are performed.![]()
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Affiliation(s)
- Shenying Xu
- Faculty of Materials and Chemical Engineering, Yibin University Yibin Sichuan 644000 People's Republic of China
| | - Quan-De Wang
- Faculty of Materials and Chemical Engineering, Yibin University Yibin Sichuan 644000 People's Republic of China .,Low Carbon Energy Institute and School of Chemical Engineering, China University of Mining and Technology Xuzhou 221008 People's Republic of China
| | - Mao-Mao Sun
- Low Carbon Energy Institute and School of Chemical Engineering, China University of Mining and Technology Xuzhou 221008 People's Republic of China
| | - Guoliang Yin
- Faculty of Materials and Chemical Engineering, Yibin University Yibin Sichuan 644000 People's Republic of China
| | - Jinhu Liang
- Faculty of Materials and Chemical Engineering, Yibin University Yibin Sichuan 644000 People's Republic of China .,School of Environment and Safety Engineering, North University of China Taiyuan 030051 People's Republic of China
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5
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Chan B, Karton A. Polycyclic aromatic hydrocarbons: from small molecules through nano-sized species towards bulk graphene. Phys Chem Chem Phys 2021; 23:17713-17723. [PMID: 34378574 DOI: 10.1039/d1cp01659h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have examined the use of systematic bond-separation reactions and purposely constructed chemistry-preserving isodesmic reactions for the thermochemical calculation of aromatic hydrocarbon species. The bond-separation approach yields somewhat disappointing accuracy even when the reaction energies are obtained with generally robust composite and double-hybrid (DH) density functional theory (DFT) methods. In contrast, for the purposely constructed reactions, we find a dramatic improvement in the accuracy for energies calculated with all methods examined. Notably, for medium-sized aromatic hydrocarbons, we find that an effective approach for formulating a well-balanced reaction is to split the target species into two halves with an aromatic overlapping region. Overall, the G4(MP2)-XK, MPW2PLYP, MN15, PBE, and DC-DFTB3 methods are reasonable within their respective classes of methods for the calculation of bond-separation as well as chemistry-preserving isodesmic reactions. We have further computed per-carbon atomization energy (AE) for a series of D6h benzene-type molecules, and thus obtained a formula for extrapolation to the graphene limit [AEn = 711.5 × (1 - 1/n0.640) kJ mol-1, where n = number of carbons]. It suggests that nano-graphene with a length larger than 10 nm would resemble properties of bulk graphene, and conversely, downsizing a nano-graphene beyond this point may lead to considerably altered properties from the bulk.
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Affiliation(s)
- Bun Chan
- Graduate School of Engineering, Nagasaki University, Bunkyo 1-14, Nagasaki-Shi, Nagasaki 852-8521, Japan.
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6
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Chan B, Collins E, Raghavachari K. Applications of isodesmic‐type reactions for computational thermochemistry. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2020. [DOI: 10.1002/wcms.1501] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Bun Chan
- Graduate School of Engineering Nagasaki University Nagasaki Japan
| | - Eric Collins
- Department of Chemistry Indiana University Bloomington Indiana USA
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Jara-Cortés J, Landeros-Rivera B, Hernández-Trujillo J. Unveiling the role of intra and interatomic interactions in the energetics of reaction schemes: a quantum chemical topology analysis. Phys Chem Chem Phys 2018; 20:27558-27570. [PMID: 30371704 DOI: 10.1039/c8cp03775b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this work we present a detailed analysis of selected reaction schemes in terms of the atomic components of the electronic energy defined by the quantum theory of atoms in molecules and the interacting quantum atoms method. The aim is to provide an interpretation tool for the energy change involved in a chemical reaction by means of the atomic and interaction contributions to the energies of the molecules involved. Ring strain in cyclic alkanes, the resonance energy of aromatic and antiaromatic molecules, local aromaticity in polycyclic aromatic hydrocarbons, intermolecular bonding in hydrogen fluoride clusters, and hydration of d-block metal dications were selected for the study. It was found that in addition to the changes in the strong C-C interactions in the carbon skeleton of the organic molecular rings, other contributions not usually considered to be important such as those between C and H atoms (either bonded or not) need to be considered in order to account for the net energy changes. The analysis unveils the role of the ionic and covalent contributions to the hydrogen bonding in HF clusters and the energetic origin and extent of cooperative effects involved. Moreover, the "double-hump" behavior observed for the hydration energy trend of [M(H2O)6]2+ complexes is explained in terms of the deformation energy of the metal cation and the increasingly covalent metal-water interactions. In addition, proper comparisons with the description provided by other methodologies are briefly discussed. The topological approach proposed in this contribution proves to be useful for the description of energy changes of apposite reaction schemes in chemically meaningful terms.
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Affiliation(s)
- Jesús Jara-Cortés
- Departamento de Física y Química Teórica, Facultad de Química, UNAM, México City, 04510, Mexico.
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Bumpus JA. Gas-Phase Heat of Formation Values for Buckminsterfullerene (C 60), C70 Fullerene (C 70), Corannulene, Coronene, Sumanene, and Other Polycyclic Aromatic Hydrocarbons Calculated Using Density Functional Theory (M06 2X) Coupled with a Versatile Inexpensive Group-Equivalent Approach. J Phys Chem A 2018; 122:6615-6632. [PMID: 30070846 DOI: 10.1021/acs.jpca.8b03321] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A straightforward procedure using density functional theory (M06 2X) coupled with a group-equivalent approach is described that was used to calculate gas-phase heat of formation (Δf H°g,298) values for buckminsterfullerene (C60), C70 fullerene (C70), corannulene, coronene, and sumanene. This procedure was also used to calculate exceptionally accurate Δf H°g,298 values for a variety of single-ring aromatic and 2-7 ring polycyclic aromatic hydrocarbons (PAHs) as well as a large selection of other hydrocarbons and phenols. The approach described herein is internally consistent, and results for C60, C70, corannulene, coronene, and sumanene are in very close agreement with results reported by others who used higher-level computational theory. Statistical analysis of a test set containing benzene and 18 two to seven ring PAHs demonstrated that by using this approach a mean absolute deviation (MAD) and a root-mean-square deviation (RMSD) of 0.8 and 1.3 kJ/mol, respectively, were achieved for reference/experimental Δf H°g,298 values versus calculated/predicted Δf H°g,298 values. For statistical analysis of a larger test set containing 235 aromatic and aliphatic hydrocarbons and phenols, a MAD and a RMSD of 1.2 and 1.9 kJ/mol, respectively, were achieved for reference/experimental Δf H°g,298 values versus calculated/predicted Δf H°g,298 values.
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Affiliation(s)
- John A Bumpus
- Department of Chemistry and Biochemistry , University of Northern Iowa , Cedar Falls , Iowa 50614 , United States
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9
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Dorofeeva OV, Osina EL. Performance of DFT, MP2, and composite ab initio methods for the prediction of enthalpies of formations of CHON compounds using isodesmic reactions. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.03.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Thermochemistry of halogen-containing organic compounds with influence on atmospheric chemistry. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2016.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Karton A. How reliable is DFT in predicting relative energies of polycyclic aromatic hydrocarbon isomers? comparison of functionals from different rungs of jacob's ladder. J Comput Chem 2016; 38:370-382. [DOI: 10.1002/jcc.24669] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 10/21/2016] [Accepted: 10/27/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Amir Karton
- School of Chemistry and BiochemistryThe University of Western AustraliaPerthWestern Australia 6009 Australia
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12
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Narayan A, Wang B, Nava Medina IB, Mannan MS, Cheng Z, Wang Q. Prediction of heat of formation for exo -Dicyclopentadiene. J Loss Prev Process Ind 2016. [DOI: 10.1016/j.jlp.2016.10.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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13
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Allison TC, Burgess DR. First-Principles Prediction of Enthalpies of Formation for Polycyclic Aromatic Hydrocarbons and Derivatives. J Phys Chem A 2015; 119:11329-65. [PMID: 26485436 PMCID: PMC5769711 DOI: 10.1021/acs.jpca.5b07908] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this article, the first-principles prediction of enthalpies of formation is demonstrated for 669 polycyclic aromatic hydrocarbon (PAH) compounds and a number of related functionalized molecules. It is shown that by extrapolating density functional theory calculations to a large basis set limit and then applying a group based correction scheme that good results may be obtained. Specifically, a mean unsigned deviation and root mean squared deviation from the experimental enthalpies of formation data of 5.0 and 6.4 kJ/mol, respectively, are obtained using this scheme. This computational scheme is economical to compute and straightforward to apply, while yielding results of reasonable reliability. The results are also compared for a smaller set of molecules to the predictions given by the G3B3 and G3MP2B3 variants of the Gaussian-3 model chemistry with a mean unsigned deviation and root mean squared deviation from the experimental enthalpies of formation of 4.5 and 4.8 kJ/mol, respectively.
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Affiliation(s)
- Thomas C. Allison
- Chemical Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8320, Gaithersburg, Maryland 20899-8320, United States
| | - Donald R. Burgess
- Chemical Science Division, Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8320, Gaithersburg, Maryland 20899-8320, United States
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14
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Bakowies D. Assessment of Density Functional Theory for Thermochemical Approaches Based on Bond Separation Reactions. J Phys Chem A 2012; 117:228-43. [DOI: 10.1021/jp310735h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dirk Bakowies
- Laboratory of Physical
Chemistry, ETH Zürich, CH 8093 Zürich, Switzerland
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15
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Prediction of hydrocarbon enthalpies of formation by various thermochemical schemes. J Comput Chem 2012; 33:2032-42. [DOI: 10.1002/jcc.23038] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Revised: 05/11/2012] [Accepted: 05/19/2012] [Indexed: 11/07/2022]
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16
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Comandini A, Malewicki T, Brezinsky K. Chemistry of polycyclic aromatic hydrocarbons formation from phenyl radical pyrolysis and reaction of phenyl and acetylene. J Phys Chem A 2012; 116:2409-34. [PMID: 22339468 DOI: 10.1021/jp207461a] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An experimental investigation of phenyl radical pyrolysis and the phenyl radical + acetylene reaction has been performed to clarify the role of different reaction mechanisms involved in the formation and growth of polycyclic aromatic hydrocarbons (PAHs) serving as precursors for soot formation. Experiments were conducted using GC/GC-MS diagnostics coupled to the high-pressure single-pulse shock tube present at the University of Illinois at Chicago. For the first time, comprehensive speciation of the major stable products, including small hydrocarbons and large PAH intermediates, was obtained over a wide range of pressures (25-60 atm) and temperatures (900-1800 K) which encompass the typical conditions in modern combustion devices. The experimental results were used to validate a comprehensive chemical kinetic model which provides relevant information on the chemistry associated with the formation of PAH compounds. In particular, the modeling results indicate that the o-benzyne chemistry is a key factor in the formation of multi-ring intermediates in phenyl radical pyrolysis. On the other hand, the PAHs from the phenyl + acetylene reaction are formed mainly through recombination between single-ring aromatics and through the hydrogen abstraction/acetylene addition mechanism. Polymerization is the common dominant process at high temperature conditions.
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Affiliation(s)
- A Comandini
- Department of Mechanical Engineering, University of Illinois at Chicago, 842 West Taylor Street, Chicago, Illinois 60607, USA
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17
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Heats of formation and hydrogenation of fused bicyclic benzene isomers: The use of Ring Conserving Isodesmic Reactions. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Dávalos JZ, Ribeiro da Silva MDDMC, Ribeiro da Silva MAV, Freitas VLS, Jiménez P, Roux MV, Cabildo P, Claramunt RM, Elguero J. Computational Thermochemistry of Six Ureas, Imidazolidin-2-one, N,N′-Trimethyleneurea, Benzimidazolinone, Parabanic Acid, Barbital (5,5′-Diethylbarbituric Acid), and 3,4,4′-Trichlorocarbanilide, with an Extension to Related Compounds. J Phys Chem A 2010; 114:9237-45. [DOI: 10.1021/jp103514f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Juan Z. Dávalos
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - Maria das Dores M. C. Ribeiro da Silva
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - Manuel A. V. Ribeiro da Silva
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - Vera L. S. Freitas
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - Pilar Jiménez
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - Maria Victoria Roux
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - Pilar Cabildo
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - Rosa M. Claramunt
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - José Elguero
- Centro de Investigação em Química, Department of Chemistry and Biochemistryy, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, Instituto de Química Física “Rocasolano”, CSIC, Serrano, 119, E-28006 Madrid, Spain, Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Senda del Rey, 9, E-28040 Madrid, Spain, and Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain
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Dávalos JZ, Guerrero A, Herrero R, Jimenez P, Chana A, Abboud JLM, Lima CFRAC, Santos LMNBF, Lago AF. Neutral, ion gas-phase energetics and structural properties of hydroxybenzophenones. J Org Chem 2010; 75:2564-71. [PMID: 20297783 DOI: 10.1021/jo100085b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have carried out a study of the energetics, structural, and physical properties of o-, m-, and p-hydroxybenzophenone neutral molecules, C(13)H(10)O(2), and their corresponding anions. In particular, the standard enthalpies of formation in the gas phase at 298.15 K for all of these species were determined. A reliable experimental estimation of the enthalpy associated with intramolecular hydrogen bonding in chelated species was experimentally obtained. The gas-phase acidities (GA) of benzophenones, substituted phenols, and several aliphatic alcohols are compared with the corresponding aqueous acidities (pK(a)), covering a range of 278 kJ.mol(-1) in GA and 11.4 in pK(a). A computational study of the various species shed light on structural effects and further confirmed the self-consistency of the experimental results.
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Affiliation(s)
- Juan Z Dávalos
- Instituto de Quimica-Fisica Rocasolano, CSIC, Serrano 119, 28006, Madrid, Spain.
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20
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Ali MA, Krishnan MS. Computational studies on cyclic [n]paraphenyleneacetylenes using homodesmotic reactions. Mol Phys 2009. [DOI: 10.1080/00268970903193002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Abou-Rachid H, Song Y, Hu A, Dudiy S, Zybin SV, Goddard WA. Predicting Solid-State Heats of Formation of Newly Synthesized Polynitrogen Materials by Using Quantum Mechanical Calculations. J Phys Chem A 2008; 112:11914-20. [DOI: 10.1021/jp8026644] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. Abou-Rachid
- Defence R&D-Canada, Valcartier 2459 Blv. Pie-XI North, Quebec, QC, Canada, G3J 1X5, Q-Science Inc., 8331 Rue Ouimet, Brossard, QC, Canada, J4Y 3B4, QuantuModeling Inc., Suite 608, 1255 Rue University, Montreal, QC, Canada, H3B 3V9, and Materials and Process Simulation Center, 139-74, California Institute of Technology, Pasadena, California 91125
| | - Y. Song
- Defence R&D-Canada, Valcartier 2459 Blv. Pie-XI North, Quebec, QC, Canada, G3J 1X5, Q-Science Inc., 8331 Rue Ouimet, Brossard, QC, Canada, J4Y 3B4, QuantuModeling Inc., Suite 608, 1255 Rue University, Montreal, QC, Canada, H3B 3V9, and Materials and Process Simulation Center, 139-74, California Institute of Technology, Pasadena, California 91125
| | - A. Hu
- Defence R&D-Canada, Valcartier 2459 Blv. Pie-XI North, Quebec, QC, Canada, G3J 1X5, Q-Science Inc., 8331 Rue Ouimet, Brossard, QC, Canada, J4Y 3B4, QuantuModeling Inc., Suite 608, 1255 Rue University, Montreal, QC, Canada, H3B 3V9, and Materials and Process Simulation Center, 139-74, California Institute of Technology, Pasadena, California 91125
| | - S. Dudiy
- Defence R&D-Canada, Valcartier 2459 Blv. Pie-XI North, Quebec, QC, Canada, G3J 1X5, Q-Science Inc., 8331 Rue Ouimet, Brossard, QC, Canada, J4Y 3B4, QuantuModeling Inc., Suite 608, 1255 Rue University, Montreal, QC, Canada, H3B 3V9, and Materials and Process Simulation Center, 139-74, California Institute of Technology, Pasadena, California 91125
| | - S. V. Zybin
- Defence R&D-Canada, Valcartier 2459 Blv. Pie-XI North, Quebec, QC, Canada, G3J 1X5, Q-Science Inc., 8331 Rue Ouimet, Brossard, QC, Canada, J4Y 3B4, QuantuModeling Inc., Suite 608, 1255 Rue University, Montreal, QC, Canada, H3B 3V9, and Materials and Process Simulation Center, 139-74, California Institute of Technology, Pasadena, California 91125
| | - W. A. Goddard
- Defence R&D-Canada, Valcartier 2459 Blv. Pie-XI North, Quebec, QC, Canada, G3J 1X5, Q-Science Inc., 8331 Rue Ouimet, Brossard, QC, Canada, J4Y 3B4, QuantuModeling Inc., Suite 608, 1255 Rue University, Montreal, QC, Canada, H3B 3V9, and Materials and Process Simulation Center, 139-74, California Institute of Technology, Pasadena, California 91125
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Lago AF, Jimenez P, Herrero R, Dávalos JZ, Abboud JLM. Thermochemistry and gas-phase ion energetics of 2-hydroxy-4-methoxy-benzophenone (oxybenzone). J Phys Chem A 2008; 112:3201-8. [PMID: 18341312 DOI: 10.1021/jp7111999] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have investigated the thermochemistry and ion energetics of the oxybenzone (2-hydroxy-4-methoxy-benzophenone, C14H12O3, 1H) molecule. The following parameters have been determined for this species: gas-phase enthalpy for the of neutral molecule at 298.15K, (Delta(f)H0(m)(g) = -303.5 +/- 5.1 kJ x mol-1), the intrinsic (gas-phase) acidity (GA(1H) = 1402.1 +/- 8.4 kJ x mol-1), enthalpy of formation for the oxybenzone anion (Delta(f)H0(m)(1-,g) = -402.3 +/- 9.8 kJ x mol-1). We also have obtained the enthalpy of formation of, 4-hydroxy-4'-methoxybenzophenone (Delta(f)H0(m)(g) = -275.4 +/- 10 kJ x mol-1) and 3-methoxyphenol anion (Delta(f)H0(m)(C7H7O2-,g) = -317.7 +/- 8.7 kJ x mol-1). A reliable experimental estimation of enthalpy related to intramolecular hydrogen bonding in oxybenzone has also been obtained (30.1 +/- 6.3 kJ x mol-1) and compared with our theoretical calculations at the B3LYP/6-311++G** level of theory, by means of an isodesmic reaction scheme. In addition, heat capacities, temperature, and enthalpy of fusion have been determined for this molecule by differential scanning calorimetry.
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Affiliation(s)
- A F Lago
- Laboratório Nacional de Luz Síncrotron (LNLS), Box 6192, CEP 13084-971, Campinas-SP, Brazil
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Lewis A, Kazantzis N, Fishtik I, Wilcox J. Integrating process safety with molecular modeling-based risk assessment of chemicals within the REACH regulatory framework: benefits and future challenges. JOURNAL OF HAZARDOUS MATERIALS 2007; 142:592-602. [PMID: 16930827 DOI: 10.1016/j.jhazmat.2006.06.089] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Registration, evaluation and authorization of chemicals (REACH) represents a recent regulatory initiative by the European union commission to protect human health and the environment from potentially hazardous chemicals. Under REACH, all stakeholders must submit (thermo)physical, thermochemical, and toxicological data for certain chemicals. The commission's impact assessment studies estimate that the costs of REACH will be approximately 3-5 billion Euros. The present study advocates the systematic incorporation of computational chemistry and computer-assisted chemical risk assessment methods into REACH to reduce regulatory compliance costs. Currently powerful computer-aided ab initio techniques can be used to generate predictions of key properties of broad classes of chemicals, without resorting to costly experimentation and potentially hazardous testing. These data could be integrated into a centralized IT decision and compliance support system, and stored in a retrievable, easily communicable manner should new regulatory and/or production requirements necessitate the introduction of different uses of chemicals under different conditions. For illustration purposes, ab initio calculations are performed on heterocyclic nitrogen-containing compounds which currently serve as high energy density materials in the chemical industry. Since investigations of these compounds are still in their infancy, stability studies are imperative regarding their safe handling and storage, as well as registration under REACH.
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Affiliation(s)
- Amanda Lewis
- Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609-2280, USA.
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Sivaramakrishnan R, Tranter RS, Brezinsky K. High Pressure Pyrolysis of Toluene. 2. Modeling Benzyl Decomposition and Formation of Soot Precursors. J Phys Chem A 2006; 110:9400-4. [PMID: 16869689 DOI: 10.1021/jp0608224] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The pyrolysis of toluene, the simplest methyl-substituted aromatic molecule, has been studied behind reflected shock waves using a single pulse shock tube. Part 1 in this two-part series focused on the high-pressure experimental results and the high-pressure limiting rate coefficients for the primary steps in toluene decomposition. The present work focuses on the modeling of benzyl decomposition and the growth of key soot precursors (C2H2, C4H2, C8H6, and indene) from toluene pyrolysis with 81 among the 262 reactions in the detailed toluene model representing the chemistry that describes the formation and decomposition of these species. Feasible pathways for benzyl decomposition as well as phenylacetylene and indene formation have been tested. The simulations also show very good agreement with the single pulse shock tube profiles for the growth of key soot precursors such as C2H2, C4H2, C8H6, and indene.
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Affiliation(s)
- R Sivaramakrishnan
- Department of Mechanical & Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA
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25
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Fishtik I, Urban D, Wilcox J. The effect of stoichiometry on ab initio-based thermochemistry predictions. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2005.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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