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Buddensiek D, Mlostoń G, Matczak P, Voss J. A DFT study on the mechanism of the formation of 1,4,2,3‐dithiadiazinanes by head‐to‐head [3 + 3] cyclodimerization of thiocarbonyl
S
‐imides. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dirk Buddensiek
- Department of Chemistry, University of Hamburg, Hamburg, Germany
| | | | | | - Jürgen Voss
- Department of Chemistry, University of Hamburg, Hamburg, Germany
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Voss J, Buddensiek D, Adiwidjaja G. Preparation and structure of 4-(dimethylamino)thiopivalophenone – intermolecular interactions in the crystal. Zeitschrift für Naturforschung B 2019. [DOI: 10.1515/znb-2019-0113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
4-(Dimethylamino)thiopivalophenone was prepared from 4-bromo-N,N-dimethylaniline, pivalonitrile and carbon disulfide. Its crystal and molecular structure was determined by single-crystal X-ray diffraction. The experimentally determined bond distances, bond angles and torsion angles are indicative of a significant contribution of a dipolar (“quinodimethane”) resonance structure to the electron distribution in the molecule. Quantum chemical calculations corroborate these results. The calculations, furthermore, provide an explanation of the arrangement of the molecules in the crystal.
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Affiliation(s)
- Jürgen Voss
- Fachbereich Chemie – Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6 , D-20146 Hamburg , Germany , Fax: +49 (0) 40 42838 5592
| | - Dirk Buddensiek
- Fachbereich Chemie – Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6 , D-20146 Hamburg , Germany
| | - Gunadi Adiwidjaja
- Fachbereich Chemie – Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6 , D-20146 Hamburg , Germany
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Affiliation(s)
- Grzegorz Mlostoń
- Department of Organic and Applied Chemistry, University of Łódź, Łódź, Poland
| | - Paulina Pipiak
- Department of Organic and Applied Chemistry, University of Łódź, Łódź, Poland
| | - Jürgen Voss
- Department of Chemistry, University of Hamburg, Hamburg, Germany
| | - Dirk Buddensiek
- Department of Chemistry, University of Hamburg, Hamburg, Germany
| | - Alexander Senning
- Department of Chemistry, Technical University of Denmark, Lyngby, Denmark
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Voss J, Buddensiek D, Senning A. The dimerization of thiophosgene and trichlorothioacetyl chloride S-imides – Head-to-head and/or head-to-tail? PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2015.1064923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Jürgen Voss
- Department of Chemistry, University of Hamburg, Hamburg, Germany
| | - Dirk Buddensiek
- Department of Chemistry, University of Hamburg, Hamburg, Germany
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Voss J, Pesel T, Buddensiek D, Lehtivarjo J. EPR Studies on Carboxylic Esters, 22 [1, 2]. Preparation of New Alkyl Azulenecarboxylates and EPR-spectroscopic Study of Their Radical Anions. Zeitschrift für Naturforschung B 2014. [DOI: 10.5560/znb.2014-3303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Five regio-isomeric alkyl azulenecarboxylates were prepared. Additional substituents such as tertbutyl groups or deuterium were introduced in certain positions of the azulene skeleton in order to facilitate the assignment of the proton hyperfine structure (hfs) coupling constants of the EPR spectra. The electrochemical behavior of the esters was studied by means of differential pulse polarography and cyclovoltammetry. In-situ electroreduction of the azulenecarboxylic esters led to the corresponding radical anions, the EPR spectra of which were recorded. The spin density distribution in these non-alternant systems as determined from hfs coupling constants was compared with the results of MO calculations and discussed with respect to the influence of substituents.
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Affiliation(s)
- Jürgen Voss
- Fachbereich Chemie – Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
| | - Thomas Pesel
- Fachbereich Chemie – Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
| | - Dirk Buddensiek
- Fachbereich Chemie – Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
| | - Juuso Lehtivarjo
- School of Pharmacy, University of Eastern Finland, P. O. Box 1627, FI-70211 Kuopio, Finland
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Voss J, Buddensiek D, Rosenboom JF. EPR Spectra and Spin Density Distribution of O, S-Dimethyl 4,4-Dithioterephthalate Radical Anions. PHOSPHORUS SULFUR 2012. [DOI: 10.1080/10426507.2011.615771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Jürgen Voss
- a Department of Chemistry , University of Hamburg , Hamburg , Germany
| | - Dirk Buddensiek
- a Department of Chemistry , University of Hamburg , Hamburg , Germany
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Buddensiek D, Köpke B, Voß J. Thioketyle, 9 ESR-Untersuchungen und semi-empirische MO-Rechnungen an aliphatischen Mono- und Dithiosemidion-Radikalanionen. ACTA ACUST UNITED AC 1987. [DOI: 10.1002/cber.19871200418] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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