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Andrews MJ, Ewing PMDA, Henry MC, Reeves M, Kamer PCJ, Müller BH, McIntosh RD, Mansell SM. Neutral Ni(II) Catalysts Based on Maple-Lactone Derived [N,O] Ligands for the Polymerization of Ethylene. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew J. Andrews
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Paul M. D. A. Ewing
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Martyn C. Henry
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Mark Reeves
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Paul C. J. Kamer
- Leibniz-Institut für Katalyse e.V. (LIKAT) an der Universität Rostock, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
| | - Bernd H. Müller
- Leibniz-Institut für Katalyse e.V. (LIKAT) an der Universität Rostock, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
| | - Ruaraidh D. McIntosh
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Stephen M. Mansell
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
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Zborowski KK, Jezierski G, Kim Y, Proniewicz LM. Tautomerism of Neutral α-Tropolone and its Protonated and Deprotonated Forms. Z PHYS CHEM 2013. [DOI: 10.1524/zpch.2013.0351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Possible structures of α-tropolone (2-hydroxy-2,4,6-cycloheptatrien-1-one) tautomers: four neutral, thirteen protonated, and four deprotonated, are studied at the B3LYP/6-311++G∗∗ computational level. The energies and the free energies calculated for the studied tautomers show that for each of the three forms, among all the possible tautomers in the tautomeric mixture, only one structure is expected: a keto-enol structure with an intramolecular hydrogen bond (neutral α-tropolone molecule), the structure with two deprotonated exocyclic oxygen atoms (tropolonate, deprotonated tropolone), and the structure with two hydroxyl group forming an intramolecular hydrogen bond (protonated tropolone). The relative energies of the studied tautomers are rationalized based on the results from the atomic energy integration performed within the frame of the Quantum Theory of Atoms in Molecules.
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Affiliation(s)
| | | | - Younkoyoo Kim
- Hankuk University of Foreign Studies, Department of Chemistry, Republik Korea
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Zborowski KK, Mohammadpour M, Sadeghi A, Proniewicz LM. Theoretical study on the molecular tautomerism of the 3-hydroxy-pyridin-4-one system. Mol Phys 2013. [DOI: 10.1080/00268976.2012.760052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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