1
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Pei Z, Connor KPE, Magann NL, Gardiner MG, Coote ML, Sherburn MS. Radical versus Non-Radical Reactivity in ortho- and para-Quinonedimethides and Implications for Cycloaddition Mechanisms. Org Lett 2024; 26:8110-8114. [PMID: 39283019 DOI: 10.1021/acs.orglett.4c03001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2024]
Abstract
The latent singlet diradical character of the parent ortho-quinonedimethide (o-QDM), as revealed by valence bond calculations, is demonstrated experimentally by trapping with the kinetically stable free radical TEMPO at room temperature. In the absence of TEMPO, the main pathway for decomposition at ambient temperature is not (as previously proposed in the literature) a radical reaction but instead a concerted Diels-Alder dimerization, which through ωB97X-D/aug-cc-pVTZ/SMD//M06-2X-D3/6-31+G(d,p)/SMD calculations is shown to proceed through an ambimodal bispericyclic transition state. The predominantly non-radical reactivity of o-QDM at room temperature differs from that of its isomeric para-quinonedimethide (p-QDM) congener, which self-reacts exclusively through radical pathways. These findings suggest the potential for tunable concerted/stepwise cycloadditions.
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Affiliation(s)
- Zhipeng Pei
- Institute for Nanoscale Science & Technology, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Kieran P E Connor
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Nicholas L Magann
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Michael G Gardiner
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Michelle L Coote
- Institute for Nanoscale Science & Technology, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Michael S Sherburn
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 2601, Australia
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2
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Hearn JC, Rice BM, Barnes BC, Chung PW. Predicting Hydrocarbon Strain Energy via a Group Equivalent Machine Learning Approach. J Phys Chem A 2024; 128:7489-7497. [PMID: 39186460 DOI: 10.1021/acs.jpca.4c03867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
Strain energy is a fundamental measure of the steric and configurational properties of organic molecules. The ability to estimate strain energy through quantum chemical simulations requires at minimum the knowledge of an initial set of nuclear coordinates. In general, such knowledge is not categorically known when screening or generating large numbers of molecule candidates in the context of molecular design. We present a machine learning approach to predict hydrocarbon strain energies using Benson group equivalents. A featurization strategy is crafted by concatenating the molecule group equivalent counts with easily computable molecular fingerprints. The data are obtained from electronic structure calculations we performed on a set of 166 previously synthesized strained hydrocarbons. These data are provided and include gas phase enthalpies of formation and associated optimized atomic coordinates. The strain energy prediction accuracy of several statistical learning methods is evaluated, and their respective merits and limitations are discussed.
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Affiliation(s)
- Jesse C Hearn
- Center for Engineering Concepts Development, Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Betsy M Rice
- U.S. DEVCOM Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Brian C Barnes
- U.S. DEVCOM Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Peter W Chung
- Center for Engineering Concepts Development, Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
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3
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Abstract
AbstractFor a long time, allenes—and cumulenic systems in general—played a relatively minor role in Diels–Alder cycloadditions. This situation has changed, since allenes are more readily available and as their unique stereochemical features in [4+2]cycloadditions are more widely recognized. This review presents a comprehensive overview of allenes in Diels–Alder processes using selected examples. Allenes in dienes, dienophiles and cycloadducts are covered, inter- and intramolecular Diels–Alder cycloadditions are discussed, and stereochemical features of the addition process are described. Areas of emerging importance are also covered, including allenic components in dehydro-Diels–Alder processes, and dendralenic allenes in Diels–Alder sequences for the rapid generation of target-relevant molecular complexity. Preparatively useful methods for allenic precursor synthesis are also discussed.1 Introduction2 Allenic Dienes2.1 Vinylallenes2.2 Bisallenes2.3 Cross-conjugated Allenes3 Allenic Dienophiles4 Intramolecular Diels–Alder Cycloadditions5 Allenic Cycloadducts6 Conclusions and Outlook
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Affiliation(s)
- Henning Hopf
- Institut für Organische Chemie, Technische Universität Braunschweig
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4
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Kunioka N, Furukawa M, Hashimoto S, Tahara K. Synthesis, electronic properties, and self-assembly of an alkylated dibenzo(biscorannulene). Org Chem Front 2022. [DOI: 10.1039/d2qo00428c] [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
The synthesis and properties of a novel fully-conjugated biscorannulene derivative were reported. This biscorannulene derivative shows self-association in solution and adopts a stacked geometry in crystal.
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Affiliation(s)
- Natsumi Kunioka
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571, Japan
| | - Masazumi Furukawa
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571, Japan
| | - Shingo Hashimoto
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571, Japan
| | - Kazukuni Tahara
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571, Japan
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5
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Li B, Yang C, Wang X, Li G, Peng W, Xiao H, Luo S, Xie S, Wu J, Zeng Z. Synthesis and Structural Elucidation of Bisdibenzocorannulene in Multiple Redox States. Angew Chem Int Ed Engl 2021; 60:19790-19796. [PMID: 33956394 DOI: 10.1002/anie.202104520] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/28/2021] [Indexed: 11/08/2022]
Abstract
We report an anti-folded bowl-shaped bisdibenzocorannulene (BDBC) featuring a new chair-cyclohexane-like hexagon as a bridge of two dibenzocorannulene moieties. The neutral compound showed multiple redox-active properties and could be converted to the corresponding redox states through chemical reduction or oxidation. Chemical reduction of BDBC by stoichiometric addition of metallic potassium in the presence of [18]crown-6 ether, provided a radical anion BDBC.- and a dianion BDBC2- , respectively; while chemical oxidation by silver hexafluoroantimonate(V), converted the neutral compound to an open-shell singlet diradical dication (BDBC.. )2+ . The structural consequences of both electron-reduction and oxidation were closely related to the release of ring-strain of the bowl-shaped π-scaffold and imposed steric hindrance of the hexagonal bridge. In addition, the unusual open-shell nature of the dication could mainly be attributed to the changing of localized antiaromaticity in the closed-shell structure to delocalized character in the biradical, and thus the emergence of weakly bonded π-electrons.
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Affiliation(s)
- Bo Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China.,School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, P. R. China
| | - Chenxin Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xinhao Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Guangwu Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Wangwang Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Huiping Xiao
- School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, P. R. China
| | - Shenglian Luo
- School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, P. R. China
| | - Sheng Xie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Jishan Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Zebing Zeng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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6
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Li B, Yang C, Wang X, Li G, Peng W, Xiao H, Luo S, Xie S, Wu J, Zeng Z. Synthesis and Structural Elucidation of Bisdibenzocorannulene in Multiple Redox States. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bo Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
- School of Materials Science and Engineering Nanchang Hangkong University Nanchang 330063 P. R. China
| | - Chenxin Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
| | - Xinhao Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
| | - Guangwu Li
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore Singapore
| | - Wangwang Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
| | - Huiping Xiao
- School of Materials Science and Engineering Nanchang Hangkong University Nanchang 330063 P. R. China
| | - Shenglian Luo
- School of Materials Science and Engineering Nanchang Hangkong University Nanchang 330063 P. R. China
| | - Sheng Xie
- State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
| | - Jishan Wu
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore Singapore
| | - Zebing Zeng
- State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
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7
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Urushizaki A, Yumura T, Kitagawa Y, Hasegawa Y, Imoto H, Naka K. Dithieno[3,4- b
:3',4'- d
]arsole: A Novel Class of Hetero[5]radialenes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Aya Urushizaki
- Faculty of Molecular Chemistry and Engineering; Graduate School of Science and Technology; Kyoto Institute of Technology; Goshokaido-cho, Matsugasaki, Sakyo-ku 606-8585 Kyoto Japan
| | - Takashi Yumura
- Faculty of Material Science and Technology Graduate School of Science and Technology; Kyoto Institute of Technology; Goshokaido-cho, Matsugasaki, Sakyo-ku 606-8585 Kyoto Japan
| | - Yuichi Kitagawa
- Faculty of Engineering; Hokkaido University; Kita-13 Jo, Nishi-8 Chome, Kita-ku 060-8628 Sapporo Hokkaido Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD); Hokkaido University; 001-0021 Sapporo Hokkaido Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering; Hokkaido University; Kita-13 Jo, Nishi-8 Chome, Kita-ku 060-8628 Sapporo Hokkaido Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD); Hokkaido University; 001-0021 Sapporo Hokkaido Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering; Graduate School of Science and Technology; Kyoto Institute of Technology; Goshokaido-cho, Matsugasaki, Sakyo-ku 606-8585 Kyoto Japan
- Materials Innovation Lab; Kyoto Institute of Technology; Goshokaido-cho, Matsugasaki, Sakyo-ku 606-8585 Kyoto Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering; Graduate School of Science and Technology; Kyoto Institute of Technology; Goshokaido-cho, Matsugasaki, Sakyo-ku 606-8585 Kyoto Japan
- Materials Innovation Lab; Kyoto Institute of Technology; Goshokaido-cho, Matsugasaki, Sakyo-ku 606-8585 Kyoto Japan
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8
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Sowden MJ, Ward JS, Sherburn MS. Synthesis and Properties of 2,3-Diethynyl-1,3-Butadienes. Angew Chem Int Ed Engl 2020; 59:4145-4153. [PMID: 31872518 DOI: 10.1002/anie.201914807] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Indexed: 11/08/2022]
Abstract
The first general preparative access to compounds of the 2,3-diethynyl-1,3-butadiene (DEBD) class is reported. The synthesis involves a one-pot, twofold Sonogashira-type, Pd0 -catalyzed coupling of two terminal alkynes and a carbonate derivative of a 2-butyne-1,4-diol. The synthesis is broad in scope and members of this structural family are kinetically stable enough to be handled using standard laboratory techniques at ambient temperature. They decompose primarily through heat-promoted cyclodimerizations, which are impeded by alkyl substitution and accelerated by aryl or alkenyl substitution. An iterative sequence of these unprecedented Sonogashira-type couplings generates a new type of expanded dendralene. A suitably substituted DEBD carrying two terminal alkyne groups undergoes Glaser-Eglinton cyclo-oligomerization to produce a new class of expanded radialenes, which are chiral due to restricted rotation about their 1,3-butadiene units. The structural features giving rise to atropisomerism in these compounds are distinct from those reported previously.
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Affiliation(s)
- Madison J Sowden
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Jas S Ward
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Michael S Sherburn
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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9
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10
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Yu J, Tang C, Gu X, Zheng X, Yu ZQ, He Z, Li XG, Tang BZ. Highly emissive phenylene-expanded [5]radialene. Chem Commun (Camb) 2020; 56:3911-3914. [DOI: 10.1039/d0cc00122h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Star: a pentagonal conjugated radialene macrocycle was one-pot synthesized for the first time. The fantastic pentagonal architecture is revealed by its single crystal structure, and affords the smallest ring strain and the best conjugation.
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Affiliation(s)
- Jie Yu
- School of Science and School of Materials Science and Engineering
- Harbin Institute of Technology
- Shenzhen
- China
| | - Chunlin Tang
- School of Science and School of Materials Science and Engineering
- Harbin Institute of Technology
- Shenzhen
- China
| | - Xinggui Gu
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Hong Kong
- China
| | - Xiaoyan Zheng
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- 100081 Beijing
- China
| | - Zhen-Qiang Yu
- Shenzhen Key Laboratory of Functional Polymers
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- China
| | - Zikai He
- School of Science and School of Materials Science and Engineering
- Harbin Institute of Technology
- Shenzhen
- China
| | - Xin-Gui Li
- School of Science and School of Materials Science and Engineering
- Harbin Institute of Technology
- Shenzhen
- China
- State Key Laboratory of Pollution Control and Resource Reuse, and Shanghai Institute of Pollution Control and Ecological Security
| | - Ben Zhong Tang
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Hong Kong
- China
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11
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Ueda M, Misaki Y. Synthesis and Redox Properties of 1,3-Dithiole[<i>n</i>]radialenes. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.1234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masafumi Ueda
- Department of Chemistry, School of Science, Kitasato University
| | - Yohji Misaki
- Department of Applied Chemistry, Graduate School of Engineering, Ehime University
- Research Unit for Power Generation and Storage Materials, Ehime University
- Research Unit for Development of Organic Superconductors, Ehime University
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12
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George J, Sherburn MS. Diene-Transmissive Enantioselective Diels-Alder Reactions and Sequences Involving Substituted Dendralenes. J Org Chem 2019; 84:14712-14723. [PMID: 31614081 DOI: 10.1021/acs.joc.9b02296] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Readily available and stable substituted [3]dendralenes undergo highly chemo-, regio-, diastereo-, and enantioselective organocatalyzed Diels-Alder reactions with acrolein to form enantiomerically enriched cycloadducts. These monocycloadducts carry semicyclic dienes that undergo a second, substrate-controlled diastereoselective Diels-Alder reaction with a different dienophile to form 2-fold cycloadducts. Overall, annulated, functional group rich, chiral Δ1(9)-octalin building blocks are accessed in one-pot operations that significantly extend the preparative value of diene-transmissive Diels-Alder sequences since they offer products of regio- and stereochemistry complementary to those generated from the parent, unsubstituted [3]dendralene.
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Affiliation(s)
- Josemon George
- Research School of Chemistry , The Australian National University , Canberra , ACT 2601 , Australia
| | - Michael S Sherburn
- Research School of Chemistry , The Australian National University , Canberra , ACT 2601 , Australia
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13
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Gu J, Wu W, Stuyver T, Danovich D, Hoffmann R, Tsuji Y, Shaik S. Cross Conjugation in Polyenes and Related Hydrocarbons: What Can Be Learned from Valence Bond Theory about Single-Molecule Conductance? J Am Chem Soc 2019; 141:6030-6047. [DOI: 10.1021/jacs.9b01420] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Junjing Gu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Wei Wu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Thijs Stuyver
- Department of Organic Chemistry and the Lise Meitner-Minerva Centre for Computational Quantum Chemistry, The Hebrew University, Jerusalem 91904, Israel
- Algemene Chemie, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - David Danovich
- Department of Organic Chemistry and the Lise Meitner-Minerva Centre for Computational Quantum Chemistry, The Hebrew University, Jerusalem 91904, Israel
| | - Roald Hoffmann
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Yuta Tsuji
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Sason Shaik
- Department of Organic Chemistry and the Lise Meitner-Minerva Centre for Computational Quantum Chemistry, The Hebrew University, Jerusalem 91904, Israel
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14
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Feng J, Gopalakrishna TY, Phan H, Wu J. Hexakis(3,6-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)cyclohexane: Closed-Shell [6]Radialene or Open-Shell Hexa-Radicaloid? Chemistry 2018; 24:9499-9503. [PMID: 29671910 DOI: 10.1002/chem.201801889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Indexed: 11/09/2022]
Abstract
A star-shaped hexaquinocyclohexane molecule 4 c is reported, which turns out to be a closed-shell extended [6]radialene with a twisted-boat conformation according to X-ray crystallographic analysis. It was formed by an unusually slow decay of its in situ generated open-shell valence isomer, the hexa-radicaloid 4 o, with a half-life time of about 156 min at room temperature. Reaction progress kinetic analysis revealed a large energy barrier of about 95.5±4.3 kJ mol-1 at room temperature from the hexa-radical form 4 o to the contorted [6]radialene form 4 c, because the transformation needs to overcome large steric repulsion between the neighboring phenoxyl units. Compound 4 c can be chemically reduced to radical anion and dianion, and the dianion is actually a diradical dianion, with a calculated diradical character of 71.9 %. This study demonstrates the unique chemical bonding nature of contorted quinoidal π-conjugated molecules and a very unusual valence isomerization process.
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Affiliation(s)
- Jiaqi Feng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Tullimilli Y Gopalakrishna
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Hoa Phan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Jishan Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
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15
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Ueda M, Shirahata T, Misaki Y. Crystal and Electronic Structures of [5]Radialene Substituted with Quintuple 1,3-Dithiol-2-ylidenes and Its Oxidative Species. ChemistrySelect 2017. [DOI: 10.1002/slct.201700288] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Masafumi Ueda
- Department of Applied Chemistry; Graduate School of Engineering; Ehime University; Matsuyama, Ehime 790-8577 Japan
| | - Takashi Shirahata
- Department of Applied Chemistry; Graduate School of Engineering; Ehime University; Matsuyama, Ehime 790-8577 Japan
- Research Unit for Power Generation and Storage Materials; Ehime University; Matsuyama, Ehime 790-8577 Japan
| | - Yohji Misaki
- Department of Applied Chemistry; Graduate School of Engineering; Ehime University; Matsuyama, Ehime 790-8577 Japan
- Research Unit for Power Generation and Storage Materials; Ehime University; Matsuyama, Ehime 790-8577 Japan
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16
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Dias JR. Radialenes are minimally conjugated cyclic π-systems. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1284358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Jerry Ray Dias
- Department of Chemistry, University of Missouri, Kansas City, MO, USA
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17
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Liu NN, Xue YY, Ding YH. Theoretical Prediction on [5]Radialene Sandwich Complexes (CpM) 2(C 10H 10) (Cp = η 5-C 5H 5; M = Fe, Co, Ni): Geometry, Spin States, and Bonding. J Phys Chem A 2017; 121:1106-1112. [DOI: 10.1021/acs.jpca.6b11066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nan-nan Liu
- Chemistry
Center, College of Food Engineering, Harbin University of Commerce, Harbin 150076, China
| | - Ying-ying Xue
- Institute
of Theoretical Chemistry, Jilin University, Changchun 130023, China
| | - Yi-hong Ding
- Institute
of Theoretical Chemistry, Jilin University, Changchun 130023, China
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18
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Mandal N, Pratik SM, Datta A. Exploring Ultrashort Hydrogen-Hydrogen Nonbonded Contacts in Constrained Molecular Cavities. J Phys Chem B 2017; 121:825-834. [PMID: 28055206 DOI: 10.1021/acs.jpcb.6b12391] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Confined molecular chambers such as macrocycle bridged E1-H···H-E2 (E1(E2) = Si(Si), 1) exhibit rare ultrashort H···H nonbonded contacts (d(H···H) = 1.56 Å). In this article, on the basis of density functional theory and ab initio molecular dynamics simulations, we propose new molecular motifs where d(H···H) can be reduced to 1.44 Å (E1(E2) = Si(Ge), 3). Further tuning the structure of the macrocycle by replacing the bulky phenyl groups by ethylenic spacers and substitution of the H-atoms by -CN groups makes the cavity more compact and furnishes even shorter d(H···H) = 1.38 Å (E1(E2) = Ge(Ge), 8). These unusually close H···H nonbonded contacts originate from the strong attractive noncovalent interactions between them, which are evident from various computational indicators, namely, NCI, Wiberg bond index, relaxed force constant, quantum theory of atoms in molecules, and natural orbitals for chemical valence combined with the extended transition state method analyses. Substantial stabilization of the in,in-configuration (exhibiting short H···H contacts) compared with the out,out-configuration (by ∼5.7 kcal/mol) and statistically insignificant fluctuations in ⟨d(H···H)⟩ and ⟨θav⟩(θ(E1(E2)-H···H = 152°) at room temperature confirm that the ultrashort H···H distances in these molecules are thermodynamically stable and would be persistent under ambient experimental conditions.
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Affiliation(s)
- Nilangshu Mandal
- Department of Spectroscopy, Indian Association for the Cultivation of Science , 2A and 2B Raja S. C. Mullick Road, Jadavpur, 700032 Kolkata, West Bengal, India
| | - Saied Md Pratik
- Department of Spectroscopy, Indian Association for the Cultivation of Science , 2A and 2B Raja S. C. Mullick Road, Jadavpur, 700032 Kolkata, West Bengal, India
| | - Ayan Datta
- Department of Spectroscopy, Indian Association for the Cultivation of Science , 2A and 2B Raja S. C. Mullick Road, Jadavpur, 700032 Kolkata, West Bengal, India
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19
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Liu N, Yu S, Ding Y. Theoretical study on [3]- and [4]radialene complexes CpM(C 2n H 2n ) (n = 3, 4; M = Sc∼Ni): Special metal-aromatic interaction along with metal-alkene bonds. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.11.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Ueda M, Tahara A, Shirahata T, Misaki Y. Molecular and Crystal Structures of Dicationic Tetrakis(1,3-benzodithiol-2-ylidene)cyclopentanone. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Ghosh T, Mondal S, Karmakar S, Mandal B. Symmetry-adapted linear combinations for the eigenvalues and eigenvectors of reciprocal graphs. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1229872] [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]
Affiliation(s)
- Tapanendu Ghosh
- Department of Chemistry, The University of Burdwan, Burdwan-713104, India
| | - Sukanya Mondal
- Department of Chemistry, The University of Burdwan, Burdwan-713104, India
| | - Somnath Karmakar
- Department of Chemistry, The University of Burdwan, Burdwan-713104, India
| | - Bholanath Mandal
- Department of Chemistry, The University of Burdwan, Burdwan-713104, India
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22
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Yuan B, Zhuang J, Kirmess KM, Bridgmohan CN, Whalley AC, Wang L, Plunkett KN. Pentaleno[1,2-a:4,5']diacenaphthylenes: Uniquely Stabilized Pentalene Derivatives. J Org Chem 2016; 81:8312-8. [PMID: 27559925 DOI: 10.1021/acs.joc.6b01480] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate the preparation of diacenaphthopentalene derivatives via a palladium-catalyzed dimerization of 1-iodo-2-arylethynyl-acenaphthylenes. The resulting 7,14-diarylpentaleno[1,2-a:4,5a']diacenaphthylenes, which contain four linearly fused five-membered rings, are benchtop stable and behave as hole-transporting or ambipolar semiconductors in organic field effect transistors. The X-ray crystal structure shows the important role of the fused naphthalene unit that enforces a formal pentalene subunit at the central five-membered rings and [5]-radialene-like structures at the proximal five-membered rings. Nucleus-independent chemical shift (NICS) calculations show the internal pentalene rings are intermediate in antiaromaticity character between known pentalene and dibenzopentalenes derivatives. The diacenaphthopentalene derivatives give high optical gap materials owing to a forbidden HOMO to LUMO transition, yet have narrow electrochemical gaps and are reduced at small negative potentials giving LUMO energy levels of -3.57 to -3.74 eV.
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Affiliation(s)
- Bingxin Yuan
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University , Carbondale, Illinois 62901, United States
| | - Junpeng Zhuang
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University , Carbondale, Illinois 62901, United States
| | - Kristopher M Kirmess
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University , Carbondale, Illinois 62901, United States
| | - Chelsea N Bridgmohan
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University , Carbondale, Illinois 62901, United States
| | - Adam C Whalley
- Department of Chemistry, The University of Vermont , Burlington, Vermont 05405, United States
| | - Lichang Wang
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University , Carbondale, Illinois 62901, United States
| | - Kyle N Plunkett
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University , Carbondale, Illinois 62901, United States
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23
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Oloba-Whenu OA, Albright TA, Soubra-Ghaoui C. Ring-whizzing in polyene-PtL2 complexes revisited. Beilstein J Org Chem 2016; 12:1410-20. [PMID: 27559391 PMCID: PMC4979650 DOI: 10.3762/bjoc.12.135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 06/23/2016] [Indexed: 01/21/2023] Open
Abstract
Ring-whizzing was investigated by hybrid DFT methods in a number of polyene-Pt(diphosphinylethane) complexes. The polyenes included cyclopropenium(+), cyclobutadiene, cyclopentadienyl(+), hexafluorobenzene, cycloheptatrienyl(+), cyclooctatetraene, octafluorooctatetraene, 6-radialene, pentalene, phenalenium(+), naphthalene and octafluoronaphthalene. The HOMO of a d(10) ML2 group (with b2 symmetry) interacting with the LUMO of the polyene was used as a model to explain the occurrence of minima and maxima on the potential energy surface.
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Affiliation(s)
| | - Thomas A Albright
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, USA
| | - Chirine Soubra-Ghaoui
- Department of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006, USA
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24
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Saglam MF, Fallon T, Paddon-Row MN, Sherburn MS. Discovery and Computational Rationalization of Diminishing Alternation in [n]Dendralenes. J Am Chem Soc 2016; 138:1022-32. [PMID: 26721640 DOI: 10.1021/jacs.5b11889] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The [n]dendralenes are a family of acyclic hydrocarbons which, by virtue of their ability to rapidly generate structural complexity, have attracted significant recent synthetic attention. [3]Dendralene through [8]dendralene have been previously prepared but no higher member of the family has been reported to date. Here, we describe the first chemical syntheses of the "higher" dendralenes, [9]dendralene through [12]dendralene. We also report a detailed investigation into the spectroscopic properties and chemical reactivity of the complete family of fundamental hydrocarbons, [3]dendralene to [12]dendralene. These studies reveal the first case of diminishing alternation in behavior in a series of related structures. We also report a comprehensive series of computational studies, which trace this dampening oscillatory effect in both spectroscopic measurements and chemical reactivity to conformational preferences.
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Affiliation(s)
- Mehmet F Saglam
- Research School of Chemistry, Australian National University , Canberra, Australian Capital Territory 2601, Australia
| | - Thomas Fallon
- Research School of Chemistry, Australian National University , Canberra, Australian Capital Territory 2601, Australia
| | - Michael N Paddon-Row
- School of Chemistry, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - Michael S Sherburn
- Research School of Chemistry, Australian National University , Canberra, Australian Capital Territory 2601, Australia
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