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Mikhaylov OA, Gridnev ID. Global Search for Stable C 4H 5NO Compounds-Guinness Molecules and Stability Islands. Molecules 2023; 28:molecules28020728. [PMID: 36677787 PMCID: PMC9860754 DOI: 10.3390/molecules28020728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/28/2022] [Accepted: 01/04/2023] [Indexed: 01/13/2023] Open
Abstract
Global reaction route mapping (GRRM) analysis for compounds with the formula C4H5NO allowed for the detection of the corresponding "Guinness molecules" 000 and 001, as well as around 150 other stable minima of the same composition. The results suggest that compounds of similar functionality form a kind of "Stability Island" with their free energies of formation falling within s relatively limited range.
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Suda K, Yokogawa D. Investigation of the metastable structures of polyiodide in acetonitrile studied using global reaction route mapping and the reference interaction site model self-consistent field explicitly including constrained spatial electron density distribution. Phys Chem Chem Phys 2022; 24:23712-23717. [PMID: 36149463 DOI: 10.1039/d2cp02719d] [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
In this study, we theoretically analyzed the metastable structures of polyiodide (I7-) in the gas and acetonitrile phases using global reaction route mapping and the reference interaction site model self-consistent field explicitly including constrained spatial electron density distribution. From the chemical reaction pathways of I7- in acetonitrile, it was found that there would be 2 types of isomerization pathways. One proceeds with constant stoichiometry and the other takes place by breaking and forming I-I bonds. In addition, we discovered that I7- had various metastable structures within ∼10 kcal mol-1. Comparing the most stable structure in the gas and acetonitrile phases, the tetrapot type is found to be the most stable structure in the gas phase; however, it is the zigzag type in acetonitrile. In order to understand this difference, we performed the decomposition analysis of the thermal correlation term in the gas and acetonitrile phases. It was found that thermal correction plays a key role in the stability and we could explain the difference in the population of the EQ states of I7- in each phase. Overall, we revealed that the solvation effect must be one of the crucial factors to stabilize the isomers of I7- and determine the chemical reaction pathways.
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Affiliation(s)
- Kayo Suda
- Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
| | - Daisuke Yokogawa
- Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
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Midoro Y, Oki T, Kodaya Y, Yamakado H. Search for Crystal Structure Candidates by Applying the Generalized Scaled Hypersphere Search Method to Volume of Unit Cell Containing Quasi Rigid Body Approximated Atoms and Molecules. CHEM LETT 2021. [DOI: 10.1246/cl.210227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuuki Midoro
- Graduate School of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan
| | - Takuto Oki
- Graduate School of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan
| | - Yoshitomo Kodaya
- Graduate School of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan
| | - Hideo Yamakado
- Graduate School of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan
- Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan
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Ohno K, Kishimoto N, Iwamoto T, Satoh H, Watanabe H. High performance global exploration of isomers and isomerization channels on quantum chemical potential energy surface of H 5 C 2 NO 2. J Comput Chem 2021; 42:192-204. [PMID: 33146910 DOI: 10.1002/jcc.26446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 10/14/2020] [Accepted: 10/16/2020] [Indexed: 11/07/2022]
Abstract
High performance global exploration of isomers and isomerization channels on the quantum chemical potential energy surface (PES) is performed for H5 C2 NO2 by using the scaled hypersphere search-anharmonic downward distortion following (SHS-ADDF) method. A multi-node operation, NeoGRRM, has achieved high performance exploration calculations for the large system by submitting SHS-ADDF sub-jobs into many cores in parallel and unifying the results of sub-jobs into the total lists of the main-job. Global exploration of equilibrium (EQ) and transition-state structures at the level of B3LYP/6-31G(d) gave 3210 EQs and 23278 TSs. Nine compounds were found in the low energy regions of 0-100 kJ/mol; the lowest energy compound is N-methylcarbamic acid, the second is methyl carbamate, and the third is glycine (the most fundamental amino acid). Interconversion pathways between the conformers of each of the low energy compounds were surveyed. Isomerization channels around glycine were explored in detail. The lowest energy barriers around some of the EQs turned to be negative after zero-point energy corrections. This indicates that those structures cannot exist as independent structures because they spontaneously collapse into more stable structures. The global PES search showed various interesting dissociating channels which indicate synthon reaction pathways in the reverse directions.
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Affiliation(s)
- Koichi Ohno
- Institute for Quantum Chemical Exploration, Tokyo, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Naoki Kishimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Hiroko Satoh
- Institute for Quantum Chemical Exploration, Tokyo, Japan.,Department of Chemistry, University of Zurich, Zurich, Switzerland.,Research Organization of Information and Systems (ROIS), Tokyo, Japan
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Ohno K, Satoh H, Iwamoto T. Quantum chemical exploration of dimeric forms of polycyclic aromatic hydrocarbons, naphthalene, perylene, and coronene. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.12.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ohno K, Kishimoto N, Iwamoto T, Satoh H. Global exploration of isomers and isomerization channels on the quantum chemical potential energy surface of H3
CNO3. J Comput Chem 2017; 38:669-687. [DOI: 10.1002/jcc.24732] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 12/23/2016] [Accepted: 12/29/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Koichi Ohno
- Institute for Quantum Chemical Exploration, Kaigan 3-9-15; Minato-ku Tokyo 108-0022 Japan
- Department of Chemistry; Graduate School of Science, Tohoku University, Aramaki Aza-Aoba 6-3, Aoba-ku; Sendai Miyagi 980-8577 Japan
| | - Naoki Kishimoto
- Department of Chemistry; Graduate School of Science, Tohoku University, Aramaki Aza-Aoba 6-3, Aoba-ku; Sendai Miyagi 980-8577 Japan
| | - Takeaki Iwamoto
- Department of Chemistry; Graduate School of Science, Tohoku University, Aramaki Aza-Aoba 6-3, Aoba-ku; Sendai Miyagi 980-8577 Japan
| | - Hiroko Satoh
- Institute for Quantum Chemical Exploration, Kaigan 3-9-15; Minato-ku Tokyo 108-0022 Japan
- Department of Chemistry; University of Zurich; Zurich 8057 Switzerland
- Research Organization of Information and Systems (ROIS); Tokyo 105-0001 Japan
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Satoh H, Oda T, Nakakoji K, Uno T, Tanaka H, Iwata S, Ohno K. Potential Energy Surface-Based Automatic Deduction of Conformational Transition Networks and Its Application on Quantum Mechanical Landscapes of d-Glucose Conformers. J Chem Theory Comput 2016; 12:5293-5308. [PMID: 27673598 DOI: 10.1021/acs.jctc.6b00439] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper describes our approach that is built upon the potential energy surface (PES)-based conformational analysis. This approach automatically deduces a conformational transition network, called a conformational reaction route map (r-map), by using the Scaled Hypersphere Search of the Anharmonic Downward Distortion Following method (SHS-ADDF). The PES-based conformational search has been achieved by using large ADDF, which makes it possible to trace only low transition state (TS) barriers while restraining bond lengths and structures with high free energy. It automatically performs sampling the minima and TS structures by simply taking into account the mathematical feature of PES without requiring any a priori specification of variable internal coordinates. An obtained r-map is composed of equilibrium (EQ) conformers connected by reaction routes via TS conformers, where all of the reaction routes are already confirmed during the process of the deduction using the intrinsic reaction coordinate (IRC) method. The postcalculation analysis of the deduced r-map is interactively carried out using the RMapViewer software we have developed. This paper presents computational details of the PES-based conformational analysis and its application to d-glucose. The calculations have been performed for an isolated glucose molecule in the gas phase at the RHF/6-31G level. The obtained conformational r-map for α-d-glucose is composed of 201 EQ and 435 TS conformers and that for β-d-glucose is composed of 202 EQ and 371 TS conformers. For the postcalculation analysis of the conformational r-maps by using the RMapViewer software program we have found multiple minimum energy paths (MEPs) between global minima of 1C4 and 4C1 chair conformations. The analysis using RMapViewer allows us to confirm the thermodynamic and kinetic predominance of 4C1 conformations; that is, the potential energy of the global minimum of 4C1 is lower than that of 1C4 (thermodynamic predominance) and that the highest energy of those of all the TS structures along a route from 4C1 to 1C4 is lower than that of 1C4 to 4C1 (kinetic predominance).
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Affiliation(s)
- Hiroko Satoh
- Research Organization of Information and Systems (ROIS), Tokyo 105-0001, Japan.,Department of Chemistry, University of Zurich , 8057 Zurich, Switzerland.,National Institute of Informatics (NII), Tokyo 101-8430, Japan.,Institute for Quantum Chemical Exploration (IQCE), Tokyo 108-0022, Japan
| | - Tomohiro Oda
- Software Research Associates Inc., Tokyo 171-8513, Japan
| | - Kumiyo Nakakoji
- Center for the Promotion of Interdisciplinary Education and Research, Kyoto University , Kyoto 606-8501, Japan
| | - Takeaki Uno
- National Institute of Informatics (NII), Tokyo 101-8430, Japan
| | - Hiroaki Tanaka
- Department of Mathematical Informatics, University of Tokyo , Tokyo 113-8654, Japan
| | - Satoru Iwata
- Department of Mathematical Informatics, University of Tokyo , Tokyo 113-8654, Japan
| | - Koichi Ohno
- Institute for Quantum Chemical Exploration (IQCE), Tokyo 108-0022, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University , Sendai 980-8578, Japan
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