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Hermann M, Böttcher T, Schorpp M, Richert S, Wassy D, Krossing I, Esser B. Cations and Anions of Dibenzo[a,e]pentalene and Reduction of a Dibenzo[a,e]pentalenophane. Chemistry 2021; 27:4964-4970. [PMID: 33443300 PMCID: PMC7986162 DOI: 10.1002/chem.202005131] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Indexed: 11/25/2022]
Abstract
Dibenzo[a,e]pentalene (DBP) is a non-alternant conjugated hydrocarbon with antiaromatic character and ambipolar electrochemical behavior. Upon both reduction and oxidation, it becomes aromatic. We herein study the chemical oxidation and reduction of a planar DBP derivative and a bent DBP-phane. The molecular structures of its planar dication, cation radical and anion radical in the solid state demonstrate the gained aromaticity through bond length equalization, which is supported by nucleus independent chemical shift-calculations. EPR spectra on the cation radical confirm the spin delocalization over the DBP framework. A similar delocalization was not possible in the reduced bent DBP-phane, which stabilized itself by proton abstraction from a solvent molecule upon reduction. This is the first report on structures of a DBP cation radical and dication in the solid state and of a reduced bent DBP derivative. Our study provides valuable insight into the charged species of DBP for its application as semiconductor.
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Affiliation(s)
- Mathias Hermann
- Institute for Organic ChemistryUniversity of FreiburgAlbertstraße 2179104FreiburgGermany
| | - Tobias Böttcher
- Institute for Inorganic and Analytical ChemistryUniversity of FreiburgAlbertstraße 2179104FreiburgGermany
| | - Marcel Schorpp
- Institute for Inorganic and Analytical ChemistryUniversity of FreiburgAlbertstraße 2179104FreiburgGermany
| | - Sabine Richert
- Institute of Physical ChemistryUniversity of FreiburgAlbertstraße 2179104FreiburgGermany
| | - Daniel Wassy
- Institute for Organic ChemistryUniversity of FreiburgAlbertstraße 2179104FreiburgGermany
| | - Ingo Krossing
- Institute for Inorganic and Analytical ChemistryUniversity of FreiburgAlbertstraße 2179104FreiburgGermany
- Freiburg Materials Research CenterUniversity of FreiburgStefan-Meier-Str. 2179104FreiburgGermany
- Freiburg Center for Interactive Materials and Bioinspired TechnologiesUniversity of FreiburgGeorges-Köhler-Allee 10579110FreiburgGermany
| | - Birgit Esser
- Institute for Organic ChemistryUniversity of FreiburgAlbertstraße 2179104FreiburgGermany
- Freiburg Materials Research CenterUniversity of FreiburgStefan-Meier-Str. 2179104FreiburgGermany
- Freiburg Center for Interactive Materials and Bioinspired TechnologiesUniversity of FreiburgGeorges-Köhler-Allee 10579110FreiburgGermany
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2
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Konishi A, Yasuda M. Breathing New Life into Nonalternant Hydrocarbon Chemistry: Syntheses and Properties of Polycyclic Hydrocarbons Containing Azulene, Pentalene, and Heptalene Frameworks. CHEM LETT 2021. [DOI: 10.1246/cl.200650] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Akihito Konishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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3
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Boyt SM, Jenek NA, Hintermair U. Synthesis of organometallic pentalenide complexes. Dalton Trans 2019; 48:5107-5124. [PMID: 30897189 DOI: 10.1039/c9dt00689c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
While a number of reports have established the unique structures and electronic properties of mono- and dinuclear pentalenide complexes of s, p, d and f block elements, access to these intriguing compounds is restricted by synthetic challenges. Here we review various strategies for the synthesis, functionalisation and (trans)metalation of pentalenide complexes from a practical point of view, pointing out promising avenues for future research that may allow wider access to novel pentalenide complexes for application in many different areas.
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Affiliation(s)
- Stuart M Boyt
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
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4
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Antiaromatic character of cycloheptatriene-bis-annelated indenofluorene framework mainly originated from heptafulvene segment. Sci Rep 2018; 8:17663. [PMID: 30518917 PMCID: PMC6281641 DOI: 10.1038/s41598-018-35839-w] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 11/06/2018] [Indexed: 12/01/2022] Open
Abstract
Fully π-conjugated polycyclic hydrocarbons with antiaromatic character have attracted research attention because of their unique properties such as narrow energy gaps, and thus should find application as optical and electronic materials. Although antiaromatic 16π-electron frameworks can be constructed by the incorporation of multiple seven-membered rings in a fused fashion to install methylenecycloheptatriene (heptafulvene) segments, the development of corresponding benzo[1,2:4,5]di[7]annulene (BDA)-containing π-conjugated systems remains challenging due to the difficulty of their molecular design and synthesis. In this study, we develop an unprecedented chemical structure of cycloheptatriene-bis-annelated indenofluorene, which possesses both BDA and indenofluorene frameworks in a fused fashion. Physical measurements and X-ray analyses, along with theoretical calculations, indicated that antiaromaticity appeared in the BDA framework. By using the conjugated polycyclic hydrocarbon possessing both seven-membered and five-membered rings, this study provides fundamental insight into the strong antiaromatic nature of heptafulvene-based BDA framework.
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5
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Saito M. Creation of Exotic π-Electron Systems by Introduction of Heavy Elements and Expansion of the Concept of Aromaticity. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180047] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Masaichi Saito
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama 338-8570, Japan
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6
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Konishi A, Okada Y, Nakano M, Sugisaki K, Sato K, Takui T, Yasuda M. Synthesis and Characterization of Dibenzo[a,f]pentalene: Harmonization of the Antiaromatic and Singlet Biradical Character. J Am Chem Soc 2017; 139:15284-15287. [DOI: 10.1021/jacs.7b05709] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Akihito Konishi
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
- Center
for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yui Okada
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Motohiro Nakano
- Department
of Chemistry, Graduate School of Science, Osaka University, 1-1
Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kenji Sugisaki
- Department
of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Kazunobu Sato
- Department
of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Takeji Takui
- Department
of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Makoto Yasuda
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
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7
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Saito M, Suda Y, Furukawa S, Nakae T, Kojima T, Sakaguchi H. Formation of Dibenzopentalene-linking Polymers under the Two-zone CVD and Wet Conditions. CHEM LETT 2017. [DOI: 10.1246/cl.170396] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masaichi Saito
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama 338-8570
| | - Yuki Suda
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama 338-8570
| | - Shunsuke Furukawa
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama 338-8570
| | - Takahiro Nakae
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011
| | - Takahiro Kojima
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011
| | - Hiroshi Sakaguchi
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011
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8
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Kuwabara T, Kurokawa N, Saito M. Reactions of Dilithium Dibenzopentalenides with Cr(CO) 3 (CH 3 CN) 3 : Unexpected Formation of a Cubic Tetramer of an Anionic Hydrodibenzopentalenyl Complex. Chempluschem 2017; 82:1039-1042. [PMID: 31961600 DOI: 10.1002/cplu.201700043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/02/2017] [Indexed: 11/06/2022]
Abstract
To explore the coordination chemistry of dibenzopentalene dianion, reactions of two dilithium dibenzopentalenides having different silyl substituents with Cr(CO)3 (CH3 CN)3 were investigated. The products were unexpected anionic complexes, [Li(Et2 O)]+ [Cr(η5 -9-hydrodibenzopentalenyl)(CO)3 ]- . The proton at the 9-position is derived from Cr(CO)3 (CH3 CN)3 , as evidenced by the use of Cr(CO)3 (CD3 CN)3 . The X-ray diffraction analysis revealed that the chromium is coordinated by an anionic five-membered ring of the pentalene skeleton, and the lithium atom is coordinated by oxygen atoms of the carbonyl groups. The complexes form a dimer or a cage-like tetramer via carbonyl-lithium interactions, depending on the bulk of the silyl groups. The cubic tetramer appears to retain its cage structure in nonpolar solvents such as benzene.
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Affiliation(s)
- Takuya Kuwabara
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama, 338-8570, Japan
| | - Nobuaki Kurokawa
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama, 338-8570, Japan
| | - Masaichi Saito
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo, Sakura-ku, Saitama-city, Saitama, 338-8570, Japan
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9
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Wei B, Li H, Zhang WX, Xi Z. Calcium-Mediated C–H and C–F Bond Cleavage: Synthesis of Indenes and Perfluorodibenzopentalenes from 1,4-Dilithio-1,3-butadienes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00073] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Baosheng Wei
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, People’s Republic of China
| | - Heng Li
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, People’s Republic of China
| | - Wen-Xiong Zhang
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, People’s Republic of China
| | - Zhenfeng Xi
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry (SIOC), Chinese Academy of Sciences, Shanghai 200032, People’s Republic of China
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10
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Li C, Liu C, Li Y, Zhu X, Wang Z. Facile synthesis of a pyrrole-fused dibenzo[a,e]pentalene and its application as a new extended, ladder-type fused aromatic system. Chem Commun (Camb) 2015; 51:693-6. [PMID: 25418778 DOI: 10.1039/c4cc07721k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A novel ladder-type pyrrole-fused dibenzo[a,e]pentalene, in which two benzo[a,e]pentalene units are held coplanar by a nitrogen bridge, is synthesized via double intermolecular Pd-catalyzed cascade crossover annulations. The introduction of a nitrogen bridge not only has a substantial influence on the optoelectronic properties but also improves the processability and stability.
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Affiliation(s)
- Cheng Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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11
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Kawase T, Nishida JI. π-Extended Pentalenes: The Revival of the Old Compound from New Standpoints. CHEM REC 2015; 15:1045-59. [DOI: 10.1002/tcr.201402093] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Indexed: 01/05/2023]
Affiliation(s)
- Takeshi Kawase
- Graduate School of Engineering; University of Hyogo; 2167 Shosha Himeji Hyogo 671-2280 Japan
| | - Jun-ichi Nishida
- Graduate School of Engineering; University of Hyogo; 2167 Shosha Himeji Hyogo 671-2280 Japan
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