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Hirakawa F, Nakagawa H, Honda S, Ishida S, Iwamoto T. Trialkylphosphines Having a Bulky Phosphacyclopentane Backbone: Structural and Redox Properties Depending on the Exocyclic Alkyl Groups and EPR Observation of a Persistent Trialkylphosphine Radical Cation. J Org Chem 2020; 85:14634-14642. [PMID: 32700539 DOI: 10.1021/acs.joc.0c01393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bulky phosphines and their redox properties have received increased attention in the view of useful auxiliary ligands for transition metal catalysts and Lewis-base components of frustrated Lewis pairs for chemical transformations. Herein we report the synthesis, structure, and properties of a series of trialkylphosphines 2R (R = methyl, ethyl, isopropyl, tert-butyl, 1-adamantyl) that possess the bulky 2,2,5,5-tetrakis(trimethylsilyl)-1-phosphacyclopentane as a structural backbone. Among these phosphines, 2Ad, which contains an adamantyl moiety, has a very large buried volume (%Vbur) for a trialkylphosphine (62.0) and shows a quasi-reversible oxidative wave at a lower oxidation potential (-0.12 V in CH2Cl2, vs ferrocene/ferrocenium couple) by cyclic voltammetry. The reaction of 2Ad with AgPF6 afforded a cationic silver aquo complex [Ag(2Ad)(H2O)]+[PF6]-, whereas the reaction with NOSbF6 gave a persistent phosphine radical cation [2Ad]•+. Based on the EPR spectra and DFT studies, the spin and positive charge of [2Ad]•+ are localized on the phosphorus atom.
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Affiliation(s)
- Fumiya Hirakawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Hiroshi Nakagawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Shunya Honda
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Shintaro Ishida
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
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2
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Ishida S, Hirakawa F, Iwamoto T. A Series of Two-Coordinate Group-15 Element (P, As, Sb, Bi) Centered Radicals Having Bulky Alkyl Groups. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180057] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shintaro Ishida
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Fumiya Hirakawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
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3
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Höhne M, Müller BH, Peulecke N, Spannenberg A, Jiao H, Rosenthal U. A Mixed Valent Trinuclear Nickel Complex. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Martha Höhne
- Leibniz Institute for Catalysis at the University of Rostock; Albert-Einstein-Str. 29A 18059 Rostock Germany
| | - Bernd H. Müller
- Leibniz Institute for Catalysis at the University of Rostock; Albert-Einstein-Str. 29A 18059 Rostock Germany
| | - Normen Peulecke
- Leibniz Institute for Catalysis at the University of Rostock; Albert-Einstein-Str. 29A 18059 Rostock Germany
| | - Anke Spannenberg
- Leibniz Institute for Catalysis at the University of Rostock; Albert-Einstein-Str. 29A 18059 Rostock Germany
| | - Haijun Jiao
- Leibniz Institute for Catalysis at the University of Rostock; Albert-Einstein-Str. 29A 18059 Rostock Germany
| | - Uwe Rosenthal
- Leibniz Institute for Catalysis at the University of Rostock; Albert-Einstein-Str. 29A 18059 Rostock Germany
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4
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Tan G, Li J, Zhang L, Chen C, Zhao Y, Wang X, Song Y, Zhang YQ, Driess M. The Charge Transfer Approach to Heavier Main-Group Element Radicals in Transition-Metal Complexes. Angew Chem Int Ed Engl 2017; 56:12741-12745. [PMID: 28801962 DOI: 10.1002/anie.201707501] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Indexed: 11/11/2022]
Abstract
The CoII and FeII complexes 1Co and 1Fe with a coordinated phosphorus radical were easily obtained through a charge-transfer approach from the MI precursors LMI (tol) (M=Co, Fe; L=CH(MeC=NDipp)2 , Dipp=2,6-iPr2 C6 H3 ) to the diazafluorenylidene-substituted phosphaalkene 1. Structural, magnetic, and computational studies on 1Co and 1Fe indicate a weak antiferromagnetic interaction between the high-spin MII ion and the phosphorus radical, resulting in a triplet and quartet ground state, respectively. Complexes 1Co and 1Fe are the first examples of phosphorus-radical-coordinated transition-metal complexes synthesized by charge transfer, providing a new approach to access radicals of heavier main-group elements.
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Affiliation(s)
- Gengwen Tan
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China
| | - Jing Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China
| | - Li Zhang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China
| | - Chao Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China
| | - You Song
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210023, China
| | - Matthias Driess
- Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
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5
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Tan G, Li J, Zhang L, Chen C, Zhao Y, Wang X, Song Y, Zhang Y, Driess M. The Charge Transfer Approach to Heavier Main‐Group Element Radicals in Transition‐Metal Complexes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707501] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gengwen Tan
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Jing Li
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Li Zhang
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Chao Chen
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - You Song
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 China
| | - Yi‐Quan Zhang
- Jiangsu Key Laboratory for NSLSCS School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China
| | - Matthias Driess
- Department of Chemistry: Metalorganics and Inorganic Materials Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
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Ishida S, Ichikawa H, Iwamoto T. Coordination-induced Hydrogen Abstraction in the Reactions of a Stable Dialkylphosphinyl Radical with BH3-Lewis Base Adducts. CHEM LETT 2017. [DOI: 10.1246/cl.170248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shintaro Ishida
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578
| | - Hitomi Ichikawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578
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7
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Suzuki S, Kira S, Kozaki M, Yamamura M, Hasegawa T, Nabeshima T, Okada K. An efficient synthetic method for organometallic radicals: structures and properties of gold(i)-(nitronyl nitroxide)-2-ide complexes. Dalton Trans 2017; 46:2653-2659. [DOI: 10.1039/c6dt04685a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
One-pot synthesis of (nitronyl nitroxide)-gold(i)-phosphine (NN-Au-P) complexes has been developed using chloro(tetrahydrothiophene)gold(i), phosphine ligands, nitronyl nitroxide radicals, and sodium hydroxide.
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Affiliation(s)
- Shuichi Suzuki
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
- Graduate School of Engineering Science
| | - Sayaka Kira
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | | | - Masaki Yamamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Toru Hasegawa
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Tatsuya Nabeshima
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Keiji Okada
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
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Sunada Y, Ishida S, Hirakawa F, Shiota Y, Yoshizawa K, Kanegawa S, Sato O, Nagashima H, Iwamoto T. Persistent four-coordinate iron-centered radical stabilized by π-donation. Chem Sci 2016; 7:191-198. [PMID: 28758000 PMCID: PMC5515065 DOI: 10.1039/c5sc02601f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Accepted: 09/25/2015] [Indexed: 11/21/2022] Open
Abstract
Dinuclear iron carbonyl complex 2, which contains an elongated unsupported Fe-Fe bond, was synthesized by the reaction between Fe2(CO)9 and phosphinyl radical 1. Thermal Fe-Fe bond homolysis led to the generation of a four-coordinate carbonyl-based iron-centered radical, 3, which is stabilized by π-donation. Complex 3 exhibited high reactivity toward organic radicals to form diamagnetic five-coordinate Fe(ii) complexes.
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Affiliation(s)
- Yusuke Sunada
- Institute for Materials Chemistry and Engineering , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan
| | - Shintaro Ishida
- Department of Chemistry , Graduate School of Science , Tohoku University , Aoba-ku , Sendai 980-8578 , Japan
| | - Fumiya Hirakawa
- Department of Chemistry , Graduate School of Science , Tohoku University , Aoba-ku , Sendai 980-8578 , Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering , Kyushu University , Nishi-ku , Fukuoka 819-0395 , Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering , Kyushu University , Nishi-ku , Fukuoka 819-0395 , Japan
| | - Shinji Kanegawa
- Institute for Materials Chemistry and Engineering , Kyushu University , Nishi-ku , Fukuoka 819-0395 , Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering , Kyushu University , Nishi-ku , Fukuoka 819-0395 , Japan
| | - Hideo Nagashima
- Institute for Materials Chemistry and Engineering , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan.,CREST , Japan Science and Technology Agency (JST) , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan
| | - Takeaki Iwamoto
- Department of Chemistry , Graduate School of Science , Tohoku University , Aoba-ku , Sendai 980-8578 , Japan
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9
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Giffin NA, Hendsbee AD, Masuda JD. Reactions of a persistent phosphinyl radical/diphosphine with heteroallenes. Dalton Trans 2016; 45:12636-8. [DOI: 10.1039/c6dt02790c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The persistent phosphinyl radical, (H2C)2(NDipp)2P˙, formed from the diphosphane [(H2C)2(NDipp)2P]2, was reacted with three heteroallenes.
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Affiliation(s)
- Nick A. Giffin
- The Atlantic Centre for Green Chemistry and the Department of Chemistry. Saint Mary's University
- Halifax
- Canada B3H 3C3
| | - Arthur D. Hendsbee
- The Atlantic Centre for Green Chemistry and the Department of Chemistry. Saint Mary's University
- Halifax
- Canada B3H 3C3
| | - Jason D. Masuda
- The Atlantic Centre for Green Chemistry and the Department of Chemistry. Saint Mary's University
- Halifax
- Canada B3H 3C3
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10
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Hirakawa F, Ichikawa H, Ishida S, Iwamoto T. Redox Reactions of a Stable Dialkylphosphinyl Radical. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00323] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fumiya Hirakawa
- Department of Chemistry,
Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Hitomi Ichikawa
- Department of Chemistry,
Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Shintaro Ishida
- Department of Chemistry,
Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Takeaki Iwamoto
- Department of Chemistry,
Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
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11
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Ishida S, Hirakawa F, Iwamoto T. Reactions of a Stable Phosphinyl Radical with Stable Aminoxyl Radicals. CHEM LETT 2015. [DOI: 10.1246/cl.140885] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shintaro Ishida
- Department of Chemistry, Graduate School of Science, Tohoku University
| | - Fumiya Hirakawa
- Department of Chemistry, Graduate School of Science, Tohoku University
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University
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12
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Ishida S. Phosphorus-centered Radical Stabilized by Bulky Alkyl Group and Related Compounds. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.885] [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]
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13
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Suzuki S, Yokoi H, Kozaki M, Kanzaki Y, Shiomi D, Sato K, Takui T, Okada K. Synthesis and Properties of a Bis[(nitronyl nitroxide)-2-ide radical anion]-Palladium Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402564] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Ishida S, Hirakawa F, Furukawa K, Yoza K, Iwamoto T. Persistent Antimony- and Bismuth-Centered Radicals in Solution. Angew Chem Int Ed Engl 2014; 53:11172-6. [DOI: 10.1002/anie.201405509] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Indexed: 11/07/2022]
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15
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Ishida S, Hirakawa F, Furukawa K, Yoza K, Iwamoto T. Persistent Antimony- and Bismuth-Centered Radicals in Solution. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405509] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Molitor S, Feichtner KS, Kupper C, Gessner VH. Substitution effects on the formation of T-shaped palladium carbene and thioketone complexes from Li/Cl carbenoids. Chemistry 2014; 20:10752-62. [PMID: 24664573 DOI: 10.1002/chem.201304927] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Indexed: 11/05/2022]
Abstract
The preparation of palladium thioketone and T-shaped carbene complexes by treatment of thiophosphoryl substituted Li/Cl carbenoids with a Pd(0) precursor is reported. Depending on the steric demand, the anion-stabilizing ability of the silyl moiety (by negative hyperconjugation effects) and the remaining negative charge at the carbenic carbon atom, isolation of a three-coordinate, T-shaped palladium carbene complex is possible. In contrast, insufficient charge stabilization results in the transfer of the sulfur of the thiophosphoryl moiety and thus in the formation of a thioketone complex. While the thioketones are stable compounds the carbene complexes are revealed to be highly reactive and decompose under elimination of Pd metal. Computational studies revealed that both complexes are formed by a substitution mechanism. While the ketone turned out to be the thermodynamically favored product, the carbene is kinetically favored and thus preferentially formed at low reaction temperatures.
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Affiliation(s)
- Sebastian Molitor
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany)
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