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Zalaltdinova AV, Sadykova YM, Gazizov AS, Smailov AK, Syakaev VV, Gerasimova DP, Chugunova EA, Akylbekov NI, Zhapparbergenov RU, Appazov NO, Burilov AR, Pudovik MA, Alabugin IV, Sinyashin OG. Superelectrophilic Activation of Phosphacoumarins towards Weak Nucleophiles via Brønsted Acid Assisted Brønsted Acid Catalysis. Int J Mol Sci 2024; 25:6327. [PMID: 38928034 PMCID: PMC11203683 DOI: 10.3390/ijms25126327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/28/2024] Open
Abstract
The electrophilic activation of various substrates via double or even triple protonation in superacidic media enables reactions with extremely weak nucleophiles. Despite the significant progress in this area, the utility of organophosphorus compounds as superelectrophiles still remains limited. Additionally, the most common superacids require a special care due to their high toxicity, exceptional corrosiveness and moisture sensitivity. Herein, we report the first successful application of the "Brønsted acid assisted Brønsted acid" concept for the superelectrophilic activation of 2-hydroxybenzo[e][1,2]oxaphosphinine 2-oxides (phosphacoumarins). The pivotal role is attributed to the tendency of the phosphoryl moiety to form hydrogen-bonded complexes, which enables the formation of dicationic species and increases the electrophilicity of the phosphacoumarin. This unmasks the reactivity of phosphacoumarins towards non-activated aromatics, while requiring only relatively non-benign trifluoroacetic acid as the reaction medium.
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Affiliation(s)
- Alena V. Zalaltdinova
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Yulia M. Sadykova
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Almir S. Gazizov
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Atabek K. Smailov
- Kazan National Research Technological University, Karl Marx Str., 68, 420015 Kazan, Russia
| | - Victor V. Syakaev
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Daria P. Gerasimova
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Elena A. Chugunova
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Nurgali I. Akylbekov
- Laboratory of Engineering Profile “Physical and Chemical Methods of Analysis”, Korkyt Ata Kyzylorda University, Aitekebie Str., 29A, Kyzylorda 120014, Kazakhstan; (N.I.A.)
- “CNEC” LLP, Dariger Ali Str., Kyzylorda 120001, Kazakhstan
| | - Rakhmetulla U. Zhapparbergenov
- Laboratory of Engineering Profile “Physical and Chemical Methods of Analysis”, Korkyt Ata Kyzylorda University, Aitekebie Str., 29A, Kyzylorda 120014, Kazakhstan; (N.I.A.)
- “DPS Kyzylorda” LLP, Amangeldy Imanov Str., 112A, Kyzylorda 120008, Kazakhstan
| | - Nurbol O. Appazov
- Laboratory of Engineering Profile “Physical and Chemical Methods of Analysis”, Korkyt Ata Kyzylorda University, Aitekebie Str., 29A, Kyzylorda 120014, Kazakhstan; (N.I.A.)
- “CNEC” LLP, Dariger Ali Str., Kyzylorda 120001, Kazakhstan
| | - Alexander R. Burilov
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Michail A. Pudovik
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA
| | - Oleg G. Sinyashin
- FRC Kazan Scientific Center, Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzova Str., 8, 420088 Kazan, Russia; (A.V.Z.); (V.V.S.); (D.P.G.); (A.R.B.)
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2
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Zapf L, Finze M. Lewis Acid Decorated Hexacyanodiborane(6) Dianion. Angew Chem Int Ed Engl 2024; 63:e202401681. [PMID: 38530744 DOI: 10.1002/anie.202401681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/03/2024] [Accepted: 03/04/2024] [Indexed: 03/28/2024]
Abstract
First examples of diborane(6) dianions decorated with weakly coordination B(C6F5)3 (BCF) groups and SiEt3 + moieties have been synthesized demonstrating the synthetic potential of the [B2(CN)6]2- dianion. [B2{CNB(C6F5)3}6]2- (1) was isolated as potassium and tetrabutylammonium salt. 1 is a rare example for a weakly coordinating dianion and it was used for the stabilization of the carbocation [Ph3C]+ and the oxonium acid [H(OEt2)2]+. Reaction of [Ph3C]21 with HSiEt3 resulted in the silylated neutral diborane(6) [B2{CNB(C6F5)3}4(CNSiEt3)2] (2) in which two BCF groups have been selectively replaced by SiEt3 + substituents, underscoring the stability and chemical versatility of the [B2(CN)6]2- dianion. The chemical properties and physicochemical data of 1 and 2 provide insight into electronic, coordinating, and steric properties of theses novel diborane(6) compounds.
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Affiliation(s)
- Ludwig Zapf
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Maik Finze
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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3
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Nelson YA, Irshad A, Kim S, Waddington MA, Salamat CZ, Gembicky M, Rheingold AL, Carta V, Tolbert S, Narayan SR, Spokoyny AM. Vertex Differentiation Strategy for Tuning the Physical Properties of closo-Dodecaborate Weakly Coordinating Anions. Inorg Chem 2023; 62:15084-15093. [PMID: 37667823 PMCID: PMC11152248 DOI: 10.1021/acs.inorgchem.3c01992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
We report the synthesis and characterization of various compounds containing the 1,7,9-hydroxylated closo-dodecahydrododecaborate (B12H9(OH)32-) cluster motif. Specifically, we show how the parent compound can be synthesized on the multigram scale and further perhalogenated, leading to a new class of vertex-differentiated weakly coordinating anions. We show that a postmodification of the hydroxyl groups by alkylation affords further opportunities for tailoring these anions' stability, steric bulk, and solubility properties. The resulting dodecaborate-based salts were subjected to a full thermal and electrochemical stability evaluation, showing that many of these anions maintain thermal stability up to 500 °C and feature no redox activity below ∼1 V vs Fc/Fc+. Mixed hydroxylated/halogenated clusters show enhanced solubility compared to their purely halogenated analogs and retain weakly coordinating properties in the solid state, as demonstrated by ionic conductivity measurements of their Li+ salts.
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Affiliation(s)
- Yessica A. Nelson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Ahamed Irshad
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA
| | - Sangmin Kim
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Mary A. Waddington
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Charlene Z. Salamat
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, USA
| | - Milan Gembicky
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA
| | - Veronica Carta
- Department of Chemistry and Biochemistry, University of California, Riverside, Riverside, California 92521, USA
| | - Sarah Tolbert
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, USA
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Sri R. Narayan
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA
| | - Alexander M. Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, USA
- California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
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4
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Kravchenko E, Gippius A, Tkachev A, Zhurenko S, Golubev A, Kubasov A, Selivanov N, Buzanov G, Bykov A, Zhizhin K, Kuznetsov N. Non-covalent Cl⋯X interactions in several silver compounds based on [B12Cl12]2− clusters: 35Cl NQR and X-ray diffraction. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2022.121231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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5
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Ma X, Rohdenburg M, Knorke H, Kawa S, Liu JKY, Aprà E, Asmis KR, Azov VA, Laskin J, Jenne C, Kenttamaa HI, Warneke J. Binding of Saturated and Unsaturated C6-Hydrocarbons to the Electrophilic Anion [B12Br11]−: A Systematic Mechanistic Study. Phys Chem Chem Phys 2022; 24:21759-21772. [DOI: 10.1039/d2cp01042a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The highly reactive gaseous ion [B12Br11]– is a metal-free closed-shell anion which spontaneously forms covalent bonds with hydrocarbon molecules, including alkanes. Herein, we systematically investigate the reaction mechanism for binding...
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6
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Tahaoğlu D, Alkan F, Durandurdu M. Theoretical investigation of substituent effects on the relative stabilities and electronic structure of [B nX n] 2- clusters. J Mol Model 2021; 27:365. [PMID: 34845522 DOI: 10.1007/s00894-021-04980-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 11/08/2021] [Indexed: 10/19/2022]
Abstract
In this study, we provide a theoretical evaluation of relative stabilities and electronic structure for [BnXn]2- clusters (n = 10, 12, 13, 14, 15, 16). Structural and electronic characteristics of [BnXn]2- clusters are examined by comparison with the [B12X12]2- counterparts with a focus on the substituent effects (X = H, F, Cl, Br, CN, BO, OH, NH2) on the electronic structure, electron detachment energies, formation enthalpies, and charge distributions. For the electronic structure and electron detachment energies, substituent effects on boron clusters are shown to follow a very similar trend to the mesomeric and inductive effects (± M and ± I) of π-conjugated systems, and the most stable derivatives in terms of HOMO/LUMO and electron detachment energies are calculated for CN and BO substituents due to strong -M effects. In the case of formation enthalpies for larger boron clusters (n ≥ 13), the icosahedral barrier is shown to increase with the halogen and CN substitution, whereas it is possible to reduce the icosahedral barrier for the cases of X = OH and NH2. It is shown that this reduction results from destabilizing the [B12X12]2- cluster with electronic (+ M) and symmetry effects induced by OH and NH2 ligands.
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Affiliation(s)
- Duygu Tahaoğlu
- Department of Nanotechnology Engineering, Abdullah Gül University, Kayseri, Turkey
| | - Fahri Alkan
- Department of Nanotechnology Engineering, Abdullah Gül University, Kayseri, Turkey.
| | - Murat Durandurdu
- Department of Nanotechnology Engineering, Abdullah Gül University, Kayseri, Turkey
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7
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Klare HFT, Oestreich M. The Power of the Proton: From Superacidic Media to Superelectrophile Catalysis. J Am Chem Soc 2021; 143:15490-15507. [PMID: 34520196 DOI: 10.1021/jacs.1c07614] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Superacidic media became famous in connection with carbocations. Yet not all reactive intermediates can be generated, characterized, and eventually isolated from these Brønsted acid/Lewis acid cocktails. The counteranion, that is the conjugate base, in these systems is often too nucleophilic and/or engages in redox chemistry with the newly formed cation. The Brønsted acidity, especially superacidity, is in fact often not even crucial unless protonation of extremely weak bases needs to be achieved. Instead, it is the chemical robustness of the aforementioned counteranion that determines the success of the protolysis. The advent of molecular Brønsted superacids derived from weakly coordinating, redox-inactive counteranions that do withstand the enormous reactivity of superelectrophiles such as silicon cations completely changed the whole field. This Perspective summarizes general aspects of medium and molecular Brønsted acidity and shows how applications of molecular Brønsted superacids have advanced from stoichiometric reactions to catalytic processes involving protons and in situ generated superelectrophiles.
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Affiliation(s)
- Hendrik F T Klare
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
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8
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Golub IE, Filippov OA, Belkova NV, Epstein LM, Shubina ES. The Reaction of Hydrogen Halides with Tetrahydroborate Anion and Hexahydro- closo-hexaborate Dianion. Molecules 2021; 26:molecules26123754. [PMID: 34202981 PMCID: PMC8235096 DOI: 10.3390/molecules26123754] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/13/2021] [Accepted: 06/15/2021] [Indexed: 11/16/2022] Open
Abstract
The mechanism of the consecutive halogenation of the tetrahydroborate anion [BH4]− by hydrogen halides (HX, X = F, Cl, Br) and hexahydro-closo-hexaborate dianion [B6H6]2− by HCl via electrophile-induced nucleophilic substitution (EINS) was established by ab initio DFT calculations [M06/6-311++G(d,p) and wB97XD/6-311++G(d,p)] in acetonitrile (MeCN), taking into account non-specific solvent effects (SMD model). Successive substitution of H− by X− resulted in increased electron deficiency of borohydrides and changes in the character of boron atoms from nucleophilic to highly electrophilic. This, in turn, increased the tendency of the B–H bond to transfer a proton rather than a hydride ion. Thus, the regularities established suggested that it should be possible to carry out halogenation more selectively with the targeted synthesis of halogen derivatives with a low degree of substitution, by stabilization of H2 complex, or by carrying out a nucleophilic substitution of B–H bonds activated by interaction with Lewis acids (BL3).
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9
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Poynder TB, Houston SD, Dutton JL. [Ag]
2
[B
12
Cl
12
] as a Catalyst in PhICl
2
Mediated Chlorination**. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tiffany B. Poynder
- Department of Chemistry and Physics La Trobe University Melbourne Victoria Australia
| | - Sevan D. Houston
- Department of Chemistry and Physics La Trobe University Melbourne Victoria Australia
| | - Jason L. Dutton
- Department of Chemistry and Physics La Trobe University Melbourne Victoria Australia
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10
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Klare HFT, Albers L, Süsse L, Keess S, Müller T, Oestreich M. Silylium Ions: From Elusive Reactive Intermediates to Potent Catalysts. Chem Rev 2021; 121:5889-5985. [PMID: 33861564 DOI: 10.1021/acs.chemrev.0c00855] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The history of silyl cations has all the makings of a drama but with a happy ending. Being considered reactive intermediates impossible to isolate in the condensed phase for decades, their actual characterization in solution and later in solid state did only fuel the discussion about their existence and initially created a lot of controversy. This perception has completely changed today, and silyl cations and their donor-stabilized congeners are now widely accepted compounds with promising use in synthetic chemistry. This review provides a comprehensive summary of the fundamental facts and principles of the chemistry of silyl cations, including reliable ways of their preparation as well as their physical and chemical properties. The striking features of silyl cations are their enormous electrophilicity and as such reactivity as super Lewis acids as well as fluorophilicity. Known applications rely on silyl cations as reactants, stoichiometric reagents, and promoters where the reaction success is based on their steady regeneration over the course of the reaction. Silyl cations can even be discrete catalysts, thereby opening the next chapter of their way into the toolbox of synthetic methodology.
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Affiliation(s)
- Hendrik F T Klare
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
| | - Lena Albers
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Strasse 9-11, 26129 Oldenburg, Germany
| | - Lars Süsse
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
| | - Sebastian Keess
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
| | - Thomas Müller
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Strasse 9-11, 26129 Oldenburg, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17 Juni 115, 10623 Berlin, Germany
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11
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12
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Asmis KR, Beele BB, Jenne C, Kawa S, Knorke H, Nierstenhöfer MC, Wang XB, Warneke J, Warneke Z, Yuan Q. Synthesis, Electronic Properties and Reactivity of [B 12 X 11 (NO 2 )] 2- (X=F-I) Dianions. Chemistry 2020; 26:14594-14601. [PMID: 33017100 PMCID: PMC7756457 DOI: 10.1002/chem.202003537] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/10/2020] [Indexed: 11/25/2022]
Abstract
Nitro‐functionalized undecahalogenated closo‐dodecaborates [B12X11(NO2)]2− were synthesized in high purities and characterized by NMR, IR, and Raman spectroscopy, single crystal X‐diffraction, mass spectrometry, and gas‐phase ion vibrational spectroscopy. The NO2 substituent leads to an enhanced electronic and electrochemical stability compared to the parent perhalogenated [B12X12]2− (X=F–I) dianions evidenced by photoelectron spectroscopy, cyclic voltammetry, and quantum‐chemical calculations. The stabilizing effect decreases from X=F to X=I. Thermogravimetric measurements of the salts indicate the loss of the nitric oxide radical (NO.). The homolytic NO. elimination from the dianion under very soft collisional excitation in gas‐phase ion experiments results in the formation of the radical [B12X11O]2−.. Theoretical investigations suggest that the loss of NO. proceeds via the rearrangement product [B12X11(ONO)]2−. The O‐bonded nitrosooxy structure is thermodynamically more stable than the N‐bonded nitro structure and its formation by radical recombination of [B12X11O]2−. and NO. is demonstrated.
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Affiliation(s)
- Knut R Asmis
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany
| | - Björn B Beele
- Fakultät für Mathematik und Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Carsten Jenne
- Fakultät für Mathematik und Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Sebastian Kawa
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany
| | - Harald Knorke
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany
| | - Marc C Nierstenhöfer
- Fakultät für Mathematik und Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99352, USA
| | - Jonas Warneke
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany.,Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318, Leipzig, Germany
| | - Ziyan Warneke
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany
| | - Qinqin Yuan
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99352, USA
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13
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Abstract
Alkanes and [B12X12]2- (X = Cl, Br) are both stable compounds which are difficult to functionalize. Here we demonstrate the formation of a boron-carbon bond between these substances in a two-step process. Fragmentation of [B12X12]2- in the gas phase generates highly reactive [B12X11]- ions which spontaneously react with alkanes. The reaction mechanism was investigated using tandem mass spectrometry and gas-phase vibrational spectroscopy combined with electronic structure calculations. [B12X11]- reacts by an electrophilic substitution of a proton in an alkane resulting in a B-C bond formation. The product is a dianionic [B12X11CnH2n+1]2- species, to which H+ is electrostatically bound. High-flux ion soft landing was performed to codeposit [B12X11]- and complex organic molecules (phthalates) in thin layers on surfaces. Molecular structure analysis of the product films revealed that C-H functionalization by [B12X11]- occurred in the presence of other more reactive functional groups. This observation demonstrates the utility of highly reactive fragment ions for selective bond formation processes and may pave the way for the use of gas-phase ion chemistry for the generation of complex molecular structures in the condensed phase.
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Li Z, Jiang Y, Yuan Q, Warneke J, Hu Z, Yang Y, Sun H, Sun Z, Wang XB. Photoelectron spectroscopy and computational investigations of the electronic structures and noncovalent interactions of cyclodextrin-closo-dodecaborate anion complexes χ-CD·B12X122− (χ = α, β, γ; X = H, F). Phys Chem Chem Phys 2020; 22:7193-7200. [DOI: 10.1039/d0cp00700e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report a joint negative ion photoelectron spectroscopy and computational study on the electronic structures and noncovalent interactions of a series of cyclodextrin-closo-dodecaborate dianion complexes, χ-CD·B12X122− (χ = α, β, γ; X = H, F).
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Affiliation(s)
- Zhipeng Li
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
- Physical Sciences Division
| | - Yanrong Jiang
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
| | - Qinqin Yuan
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Jonas Warneke
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Zhubin Hu
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
| | - Yan Yang
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
| | - Haitao Sun
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
- Collaborative Innovation Center of Extreme Optics
| | - Zhenrong Sun
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
- Collaborative Innovation Center of Extreme Optics
| | - Xue-Bin Wang
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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15
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Zhang Y, Wang L, Hu J, Duttwyler S, Cui X, Xing H. Solvent-dependent supramolecular self-assembly of boron cage pillared metal–organic frameworks for selective gas separation. CrystEngComm 2020. [DOI: 10.1039/d0ce00142b] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A family of microporous boron cage pillared supramolecular metal–organic frameworks are synthesized with the self-assembly behavior controlled by solvents. Interpenetrated BSF-4 is potential for highly selective C2H2/C2H4 and C2H2/CO2 separation.
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Affiliation(s)
- Yuanbin Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Lingyao Wang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Jianbo Hu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Simon Duttwyler
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Xili Cui
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Huabin Xing
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
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16
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Kamin AA, Juhasz MA. Exhaustive Cyanation of the Dodecaborate Dianion: Synthesis, Characterization, and X-ray Crystal Structure of [B12(CN)12]2–. Inorg Chem 2019; 59:189-192. [DOI: 10.1021/acs.inorgchem.9b03037] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Austin A. Kamin
- Department of Chemistry, Whitman College, 345 Boyer Avenue, Walla Walla, Washington 99362, United States
| | - Marcus A. Juhasz
- Department of Chemistry, Whitman College, 345 Boyer Avenue, Walla Walla, Washington 99362, United States
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17
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Saha A, Si MK, Ganguly B. A new strategy to generate super and hyper acids with simple organic molecules exploiting σ-hole interaction. Phys Chem Chem Phys 2019; 21:17772-17778. [PMID: 31368467 DOI: 10.1039/c9cp03881g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Super and hyper acidity can be achieved using σ-hole non-covalent interactions with simple organic systems. The σ-hole interaction can stabilize the conjugate base of acids to such an extent that cyclopentadiene yields a ΔHacid of 256 kcal mol-1, which is ∼100 kcal mol-1 lower than the reported results. The hyper acidic value of 209.0 kcal mol-1 of organic acids has been achieved without electron-withdrawing substituents rather exploiting only σ-hole interaction. Remarkably, the 1st and 2nd acidity values (∼229 kcal mol-1) of comparable strength in the hyperacid range have been observed for the first time using DFT computations. The simple organic acids were predicted to reach the pKa values in the range of -7.3 to -7.8 in DMSO, which is remarkably lower than previous reports. These stable anions can be a potential candidate for application as an effective electrolyte in lithium-ion batteries.
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Affiliation(s)
- Anusuya Saha
- Computation and Simulation Unit (Analytical Discipline and Centralized Instrument Facility), CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India.
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18
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Díaz-Tinoco M, Ortiz J. Carborane superhalide bases and their conjugate Brønsted-Lowry Superacids: Electron binding energies and Dyson orbitals. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2019.01.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Su P, Hu H, Warneke J, Belov ME, Anderson GA, Laskin J. Design and Performance of a Dual-Polarity Instrument for Ion Soft Landing. Anal Chem 2019; 91:5904-5912. [PMID: 30999743 DOI: 10.1021/acs.analchem.9b00309] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Pei Su
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Hang Hu
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Jonas Warneke
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnestr. 2, 04103 Leipzig, Germany
| | | | - Gordon A. Anderson
- GAA Custom Engineering, LLC, POB 335, Benton City, Washington 99320, United States
| | - Julia Laskin
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
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20
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Avdeeva V, Kravchenko E, Gippius A, Vologzhanina A, Ugolkova E, Minin V, Malinina E, Kuznetsov N. Synthesis, structure, and physicochemical properties of triply-bridged binuclear copper(II) complex [Cu2Phen2(µ-CH3CO2)2(µ-OH)]2[B10Cl10]. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.12.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Uhl W, Tolzmann M, Willeke K, Honacker C, Hepp A, Layh M, Würthwein E. Silicon–Halogen Bond Activation in Mixed Si/Al Compounds and an Approach to Intramolecular Stabilized Silylium Ions. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801273] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Werner Uhl
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
- Organisch‐Chemisches Institut and Center for Multiscale Theory and Computation (CMTC) Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Michael Tolzmann
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Kira Willeke
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Christian Honacker
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Marcus Layh
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Ernst‐Ulrich Würthwein
- Organisch‐Chemisches Institut and Center for Multiscale Theory and Computation (CMTC) Universität Münster Corrensstraße 40 48149 Münster Germany
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22
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Bartalucci N, Bortoluzzi M, Zacchini S, Pampaloni G, Marchetti F. Straightforward formation of carbocations from tertiary carboxylic acids via CO release at room temperature. Dalton Trans 2019; 48:1574-1577. [PMID: 30525172 DOI: 10.1039/c8dt04416c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We report an unprecedented mode of reactivity of carboxylic acids. A series of tertiary carboxylic acids, containing at least one phenyl α-substituent, undergo loss of carbon monoxide at room temperature (295 K), by a one pot reaction with 0.5-1 molar equivalents of WCl6 in dichloromethane. A plausible mechanism for the Ph3CCO2H/WCl6 reaction, leading to [CPh3][WOCl5] and Ph3CCl, is proposed on the basis of DFT calculations. The analogous reactions involving CEt(Ph)2CO2H, CMe(Ph)2CO2H and CMe2(Ph)CO2H selectively afforded stable hydrocarbons (alkene or indene, depending on the case), apparently resulting from the rearrangement of elusive tertiary carbocations.
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Affiliation(s)
- Niccolò Bartalucci
- University of Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy.
| | - Marco Bortoluzzi
- University Ca' Foscari Venezia, Dipartimento di Scienze Molecolari e Nanosistemi, Via Torino 155, I-30170 Mestre, VE, Italy
| | - Stefano Zacchini
- University of Bologna, Dipartimento di Chimica Industriale "Toso Montanari", Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Guido Pampaloni
- University of Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy.
| | - Fabio Marchetti
- University of Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy.
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23
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Kramer N, Wadepohl H, Greb L. Tris(dimethylamino)silylium ion: structure and reactivity of a dimeric silaguanidinium. Chem Commun (Camb) 2019; 55:7764-7767. [DOI: 10.1039/c9cc03625c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The formal dimer of an elusive silaguanidinium ion is described. It undergoes spontaneous electrophilic aromatic silylation of electron rich π-systems.
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Affiliation(s)
- Nina Kramer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Lutz Greb
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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24
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Bartalucci N, Marchetti F, Zacchini S, Pampaloni G. Decarbonylation of phenylacetic acids by high valent transition metal halides. Dalton Trans 2019; 48:5725-5734. [DOI: 10.1039/c9dt00551j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The unusual decarbonylation of α-phenyl carboxylic acids with suitable substituents is a general reaction promoted at room temperature by homoleptic halides of high valent transition metals.
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Affiliation(s)
- Niccolò Bartalucci
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- I-56124 Pisa
- Italy
| | - Fabio Marchetti
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- I-56124 Pisa
- Italy
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna
- I-40136 Bologna
- Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- I-56124 Pisa
- Italy
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25
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Warneke J, Konieczka SZ, Hou GL, Aprà E, Kerpen C, Keppner F, Schäfer TC, Deckert M, Yang Z, Bylaska EJ, Johnson GE, Laskin J, Xantheas SS, Wang XB, Finze M. Properties of perhalogenated {closo-B10} and {closo-B11} multiply charged anions and a critical comparison with {closo-B12} in the gas and the condensed phase. Phys Chem Chem Phys 2019; 21:5903-5915. [DOI: 10.1039/c8cp05313h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Dependence of electronic properties and reactivity of closo-borates with size and halogen substituent was investigated.
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26
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Zhang Y, Sun Y, Wang T, Liu J, Spingler B, Duttwyler S. Synthesis and Structural Characterization of Amidine, Amide, Urea and Isocyanate Derivatives of the Amino- closo-dodecaborate Anion [B 12H 11NH₃] . Molecules 2018; 23:molecules23123137. [PMID: 30501105 PMCID: PMC6321512 DOI: 10.3390/molecules23123137] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 11/14/2018] [Accepted: 11/16/2018] [Indexed: 11/17/2022] Open
Abstract
The synthesis and structural characterization of new derivatives of [B12H12]2− is of fundamental interest and is expected to allow for extended applications. Herein we report on the synthesis of a series of amidine, amide, urea and isocyanate derivatives based on the amino-closo-dodecaborate anion [B12H11NH3]−. Their structures have been confirmed by spectroscopic methods, and nine crystal structures are presented.
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Affiliation(s)
- Yuanbin Zhang
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Yuji Sun
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Tao Wang
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Bernhard Spingler
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
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27
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Zhang Y, Wang T, Wang L, Sun Y, Lin F, Liu J, Duttwyler S. RhIII
-Catalyzed Functionalization of closo
-Dodecaborates by Selective B−H Activation: Bypassing Competitive C−H Activation. Chemistry 2018; 24:15812-15817. [DOI: 10.1002/chem.201803455] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Yuanbin Zhang
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - Tao Wang
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - Lingyao Wang
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - Yuji Sun
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - Furong Lin
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - Jiyong Liu
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - Simon Duttwyler
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
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28
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Riddlestone IM, Kraft A, Schaefer J, Krossing I. Die Schöne (WCA) und das (kationische) Biest: Neues aus der Chemie von und mit schwach koordinierenden Anionen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710782] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ian M. Riddlestone
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
| | - Anne Kraft
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
| | - Julia Schaefer
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie; Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
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29
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Riddlestone IM, Kraft A, Schaefer J, Krossing I. Taming the Cationic Beast: Novel Developments in the Synthesis and Application of Weakly Coordinating Anions. Angew Chem Int Ed Engl 2018; 57:13982-14024. [PMID: 29266644 DOI: 10.1002/anie.201710782] [Citation(s) in RCA: 251] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Indexed: 12/11/2022]
Abstract
This Review gives a comprehensive overview of the most topical weakly coordinating anions (WCAs) and contains information on WCA design, stability, and applications. As an update to the 2004 review, developments in common classes of WCA are included. Methods for the incorporation of WCAs into a given system are discussed and advice given on how to best choose a method for the introduction of a particular WCA. A series of starting materials for a large number of WCA precursors and references are tabulated as a useful resource when looking for procedures to prepare WCAs. Furthermore, a collection of scales that allow the performance of a WCA, or its underlying Lewis acid, to be judged is collated with some advice on how to use them. The examples chosen to illustrate WCA developments are taken from a broad selection of topics where WCAs play a role. In addition a section focusing on transition metal and catalysis applications as well as supporting electrolytes is also included.
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Affiliation(s)
- Ian M Riddlestone
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Anne Kraft
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Julia Schaefer
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
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30
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Melánová K, Holub J, Hynek J, Fanfrlík J, Beneš L, Kutálek P, Krejčová A, Hnyk D, Zima V. Outerly functionalized and non-functionalized boron clusters intercalated into layered hydroxides with different modes of binding: materials for superacid storage. Dalton Trans 2018; 47:11669-11679. [PMID: 30101969 DOI: 10.1039/c8dt02251h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two binary boron hydrides (NH4)2B10H10 and Na2B12H12 and mono- and dicarboxy p- and m-carboranes (namely, 1-(COOH)-closo-1,7-C2B10H11, 1,12-(COOH)2-closo-1,12-C2B10H10 and 1,7-(COOH)2-closo-1,7-C2B10H10) were intercalated into ZnAl-layered double hydroxides (ZnAl-LDH) and into Zn5(OH)8(NO3)2·2H2O. The formed compounds were characterized using elemental analysis, thermogravimetry analysis, X-ray powder diffraction, infrared spectroscopy and solid state NMR. All the intercalated boron compounds are present in the interlayer space of the layered hosts as anions. It is presumed that in the case of B10H102-, B12H122- and 1,12-(COO)2-closo-1,12-C2B10H102-, the guest molecules form a monolayer, whereas in the case of 1-(COO)-closo-1,7-C2B10H111- and 1,7-(COO)2-closo-1,7-C2B10H102- a bilayer arrangement is more probable. In the case of 1,7-(COO)2-closo-1,7-C2B10H102-, the guest molecules are strongly interdigitated resulting in lowering of the interlayer distance. Two different modes of binding were found. Whereas the carboxylate derivatives of p- and m-carboranes are bonded through classical hydrogen bonds, the corresponding parent borane anions interact with the host structures by mainly dihydrogen bonding. In effect, both kinds of hydrogen bonding are mainly of an electrostatic nature. The dihydrogen bond is detected, e.g. in crystal engineering, and represents a driving force for interactions of boranes with biomolecules. Since the latter dicarboxylic acids were found to be superacids, their interactions with the host structures should be stronger than in the case of the benzoic and terephthalic acid intercalates.
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Affiliation(s)
- Klára Melánová
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic.
| | - Josef Holub
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec - ŘeŽ, Czech Republic.
| | - Jan Hynek
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec - ŘeŽ, Czech Republic.
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Ludvík Beneš
- Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
| | - Petr Kutálek
- Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
| | - Anna Krejčová
- Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec - ŘeŽ, Czech Republic.
| | - Vítězslav Zima
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic.
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31
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Malischewski M, Bukovsky EV, Strauss SH, Seppelt K. Structure of (SiEt3)2(B12F12). Another example of R3Si F E bridge bonding (E=B, Al, Si). J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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32
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Sun Y, Zhang J, Zhang Y, Liu J, van der Veen S, Duttwyler S. The closo-Dodecaborate Dianion Fused with Oxazoles Provides 3D Diboraheterocycles with Selective Antimicrobial Activity. Chemistry 2018; 24:10364-10371. [PMID: 29738073 DOI: 10.1002/chem.201801602] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/05/2018] [Indexed: 11/11/2022]
Abstract
The synthesis and application of icosahedral boron cluster compounds has been studied extensively since their discovery several decades ago; however, two aspects of their chemistry have received little attention: The possibility to form inorganic/organic fused boraheterocycles and their potential to act as antimicrobial agents. This work comprises the preparation of a class of 3D diborabenzoxazole analogues with the closo-dodecaborate in place of the benzene moiety. The presented synthetic procedures provide access to a wide range of diboraheterocycles under mild conditions. These 3D heterocycles exhibit strong and selective antimicrobial activity against Neisseria gonorrhoeae, a widespread bacterial pathogen that has shown increasing incidences of multidrug resistance and for which the development of new antimicrobial compounds is urgently needed.
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Affiliation(s)
- Yuji Sun
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
| | - Jianglin Zhang
- Department of Medical Microbiology and Parasitology, School of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Yuanbin Zhang
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
| | - Stijn van der Veen
- Department of Microbiology and Parasitology, Collaborative Innovation Center for Diagnosis, and Treatment of Infectious Diseases, School of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
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33
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Hepp A, Labbow R, Reiß F, Schulz A, Villinger A. Carba-closo
-dodecaborates - Synthesis, Structure, and Energetics. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800219] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander Hepp
- Institut für Anorganische und Analytische Chemie; Universität Münster; Correnstrasse 28-30 48149 Münster Germany
| | - René Labbow
- Institut für Chemie; Abteilung für Anorganische Chemie; Universität Rostock; Albert-Einstein-Strasse 3a 18059 Rostock Germany
| | - Fabian Reiß
- Leibniz-Institut für Katalyse e.V.; Universität Rostock; Albert-Einstein-Strasse 29a 18059 Rostock Deutschland
| | - Axel Schulz
- Institut für Chemie; Abteilung für Anorganische Chemie; Universität Rostock; Albert-Einstein-Strasse 3a 18059 Rostock Germany
- Leibniz-Institut für Katalyse e.V.; Universität Rostock; Albert-Einstein-Strasse 29a 18059 Rostock Deutschland
| | - Alexander Villinger
- Institut für Chemie; Abteilung für Anorganische Chemie; Universität Rostock; Albert-Einstein-Strasse 3a 18059 Rostock Germany
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34
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El Anwar S, Holub J, Tok O, Jelínek T, Růžičková Z, Fojt L, Šolínová V, Kašička V, Grüner B. Synthesis and selected properties of nonahalogenated 2-ammonio-decaborate anions and their derivatives substituted at N-centre. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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35
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Oliva-Enrich JM, Humbel S, Santaballa JA, Alkorta I, Notario R, Dávalos JZ, Canle-L. M, Bernhardt E, Holub J, Hnyk D. Predicted Gas-Phase and Liquid-Phase Acidities of Carborane Carboxylic and Dicarboxylic Acids. ChemistrySelect 2018. [DOI: 10.1002/slct.201800683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Stephane Humbel
- Aix Marseille University, CNRS, Centrale Marseille, iSm2; Marseille France
| | - J. Arturo Santaballa
- Grupo de Reactividade Química e Fotorreactividade; Departamento de Química; Facultade de Ciencias and CICA; Universidade da Coruña; ES-15071 A Coruña Spain
| | - Ibon Alkorta
- Instituto de Química Médica, CSIC; Juan de la Cierva 3 E-28006 Madrid Spain
| | - Rafael Notario
- Physical Chemistry Institute “Rocasolano”, CSIC; E-28006 Madrid Spain
| | - Juan Z. Dávalos
- Physical Chemistry Institute “Rocasolano”, CSIC; E-28006 Madrid Spain
| | - Moisés Canle-L.
- Grupo de Reactividade Química e Fotorreactividade; Departamento de Química; Facultade de Ciencias and CICA; Universidade da Coruña; ES-15071 A Coruña Spain
| | - Eduard Bernhardt
- Fakultät für Mathematik und Naturwissenschaften; Anorganische Chemie; Bergische Universität Wuppertal; Gaußstraße 20 42119 Wuppertal Germany
| | - Josef Holub
- Institute of Inorganic Chemistry of the Academy of Sciences of the Czech Republic, v.v.i.; 250 68 Husinec-Řež Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Academy of Sciences of the Czech Republic, v.v.i.; 250 68 Husinec-Řež Czech Republic
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36
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Axtell JC, Saleh LMA, Qian EA, Wixtrom AI, Spokoyny AM. Synthesis and Applications of Perfunctionalized Boron Clusters. Inorg Chem 2018; 57:2333-2350. [PMID: 29465227 PMCID: PMC5985200 DOI: 10.1021/acs.inorgchem.7b02912] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This Viewpoint describes major advances pertaining to perfunctionalized boron clusters in synthesis and their respective applications. The first portion of this work highlights key synthetic methods, allowing one to access a wide range of polyhedral boranes (B4 and B6-B12 cluster cores) that contain exhaustively functionalized vertices. The second portion of this Viewpoint showcases the historical developments in using these molecules for applications ranging from materials science to medicine. Last, we suggest potential new directions for these clusters as they apply to both synthetic methods and applications.
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Affiliation(s)
- Jonathan C. Axtell
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, United States
| | - Liban M. A. Saleh
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, United States
| | - Elaine A. Qian
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, United States
- Department of Bioengineering, University of California, Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, United States
- California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, United States
| | - Alex I. Wixtrom
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, United States
| | - Alexander M. Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095, United States
- California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, United States
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37
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Paenurk E, Kaupmees K, Himmel D, Kütt A, Kaljurand I, Koppel IA, Krossing I, Leito I. A unified view to Brønsted acidity scales: do we need solvated protons? Chem Sci 2017; 8:6964-6973. [PMID: 29147523 PMCID: PMC5642146 DOI: 10.1039/c7sc01424d] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 08/03/2017] [Indexed: 11/21/2022] Open
Abstract
The most comprehensive solvent acidity scale spanning 28 orders of magnitude of acidity was measured in the low-polarity solvent 1,2-dichloroethane (DCE). Its experimental core is linked to the unified acidity scale (pHabs) in an unprecedented and generalized approach only based on experimental values. This enables future measurements of acid strengths and acidity adjustments in low polarity solvents. The scale was cross-validated computationally. The purely experimental and computational data agree very well. The DCE scale includes 87 buffer systems with values between -13.0 and +15.4, i.e. similar to water at hypothetical and extreme pH values of -13.0 to +15.4. Unusually, such high acidities in DCE are not realized via solvated protons, but rather through strongly acidic molecules able to directly donate their proton, even to weak bases dissolved in the solution. Thus, in all examined cases, not a single solvated proton is present in one liter of DCE.
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Affiliation(s)
- Eno Paenurk
- Institute of Chemistry , University of Tartu , Ravila 14a Str , 50411 Tartu , Estonia .
| | - Karl Kaupmees
- Institute of Chemistry , University of Tartu , Ravila 14a Str , 50411 Tartu , Estonia .
| | - Daniel Himmel
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungs-zentrum (FMF) , Albert-Ludwigs-Universität Freiburg , Albertstr. 21 , 79104 Freiburg , Germany .
| | - Agnes Kütt
- Institute of Chemistry , University of Tartu , Ravila 14a Str , 50411 Tartu , Estonia .
| | - Ivari Kaljurand
- Institute of Chemistry , University of Tartu , Ravila 14a Str , 50411 Tartu , Estonia .
| | - Ilmar A Koppel
- Institute of Chemistry , University of Tartu , Ravila 14a Str , 50411 Tartu , Estonia .
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungs-zentrum (FMF) , Albert-Ludwigs-Universität Freiburg , Albertstr. 21 , 79104 Freiburg , Germany .
| | - Ivo Leito
- Institute of Chemistry , University of Tartu , Ravila 14a Str , 50411 Tartu , Estonia .
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38
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Li CX, Zhang HY, Wong TY, Cao HJ, Yan H, Lu CS. Pyridyl-Directed Cp*Rh(III)-Catalyzed B(3)–H Acyloxylation of o-Carborane. Org Lett 2017; 19:5178-5181. [DOI: 10.1021/acs.orglett.7b02450] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Chun-Xiao Li
- State Key Laboratory
of Coordination
Chemistry, School of Chemistry and Chemical Engineering, and Jiangsu
Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Hao-Yun Zhang
- State Key Laboratory
of Coordination
Chemistry, School of Chemistry and Chemical Engineering, and Jiangsu
Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Tsz-Yung Wong
- State Key Laboratory
of Coordination
Chemistry, School of Chemistry and Chemical Engineering, and Jiangsu
Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Hou-Ji Cao
- State Key Laboratory
of Coordination
Chemistry, School of Chemistry and Chemical Engineering, and Jiangsu
Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Hong Yan
- State Key Laboratory
of Coordination
Chemistry, School of Chemistry and Chemical Engineering, and Jiangsu
Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Chang-Sheng Lu
- State Key Laboratory
of Coordination
Chemistry, School of Chemistry and Chemical Engineering, and Jiangsu
Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
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39
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Polyhalogenated Decaborate and 1-Ammoniododecaborate Ions: An Improved Synthesis with Elemental Halogens, and Physicochemical and Chemical Properties. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700651] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Bolli C, Derendorf J, Jenne C, Keßler M. Halogenatedcloso-Dodecaborate Anions Stabilize Weakly Bound [(Me3NH)3X]2+(X = Cl, Br) Dications in the Solid State. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700620] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Christoph Bolli
- Fakultät für Mathematik und Naturwissenschaften; Anorganische Chemie; Bergische Universität Wuppertal; Gaussstr. 20 42119 Wuppertal Germany
| | - Janis Derendorf
- Fakultät für Mathematik und Naturwissenschaften; Anorganische Chemie; Bergische Universität Wuppertal; Gaussstr. 20 42119 Wuppertal Germany
| | - Carsten Jenne
- Fakultät für Mathematik und Naturwissenschaften; Anorganische Chemie; Bergische Universität Wuppertal; Gaussstr. 20 42119 Wuppertal Germany
| | - Mathias Keßler
- Fakultät für Mathematik und Naturwissenschaften; Anorganische Chemie; Bergische Universität Wuppertal; Gaussstr. 20 42119 Wuppertal Germany
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41
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Peryshkov DV, Strauss SH. Exceptional Structural Compliance of the B12F122– Superweak Anion. Inorg Chem 2017; 56:4072-4083. [DOI: 10.1021/acs.inorgchem.7b00051] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dmitry V. Peryshkov
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Steven H. Strauss
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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42
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Bertocco P, Derendorf J, Jenne C, Kirsch C. Improving the Solubility of Halogenated 1-Ammonio-closo-dodecaborate Anions. Inorg Chem 2017; 56:3459-3466. [DOI: 10.1021/acs.inorgchem.6b03006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Philipp Bertocco
- Fakultät für Mathematik und
Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Janis Derendorf
- Fakultät für Mathematik und
Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Carsten Jenne
- Fakultät für Mathematik und
Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Christoph Kirsch
- Fakultät für Mathematik und
Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
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43
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Zhang Y, Sun Y, Lin F, Liu J, Duttwyler S. Rhodium(III)-Catalyzed Alkenylation-Annulation ofcloso-Dodecaborate Anions through Double B−H Activation at Room Temperature. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607867] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yuanbin Zhang
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Yuji Sun
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Furong Lin
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Jiyong Liu
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Simon Duttwyler
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
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44
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Zhang Y, Sun Y, Lin F, Liu J, Duttwyler S. Rhodium(III)-Catalyzed Alkenylation-Annulation ofcloso-Dodecaborate Anions through Double B−H Activation at Room Temperature. Angew Chem Int Ed Engl 2016; 55:15609-15614. [DOI: 10.1002/anie.201607867] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 09/29/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Yuanbin Zhang
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Yuji Sun
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Furong Lin
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Jiyong Liu
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
| | - Simon Duttwyler
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P.R. China
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45
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Secondary interactions in decachloro-closo-decaborates R2[B10Cl10] (R = Et3NH+, Ph4P+, and [Ag(NH3)2]+): 35Cl NQR, PW-DFT, and X-ray studies. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.03.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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46
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Betancourt SK, Pilo AL, Bu J, McLuckey SA. Simplification of electrospray mass spectra of Polysorbate 80 via cation transfer to carborane anions. JOURNAL OF MASS SPECTROMETRY : JMS 2016; 51:453-458. [PMID: 27270869 DOI: 10.1002/jms.3775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/21/2016] [Accepted: 04/20/2016] [Indexed: 06/06/2023]
Abstract
Mass spectrometric analysis of polymer mixtures via electrospray ionization can be complicated due the presence of multiple ion types, multiple charge states and multiple oligomeric distributions that complicate the detection and identification of mixture components. Polysorbate 80 (commercially known as Tween(®) 80) provides an example of this type, where the presence of polyoxyethylene sorbitan monooleate (PSO) byproducts gives rise to overlapping polymer distributions. It is desirable to simplify the spectrum in order to identify each component of what is inherently a complex mixture of fatty esters bound to different head groups. In this work, we show that gas-phase ion/ion reactions with carborane anions allow for the charge reduction of Tween(®) 80 peaks by selectively removing metal adducts bound to the synthetic polymer. The resulting singly charged spectrum reduces overlapping distributions and thus simplifies the identification of the components found in a Tween(®) 80 sample. The overall approach described here would likely lead to similar benefits in the analysis of other polymers that tend to ionize via metal ion adduction. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Stella K Betancourt
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907-2084, USA
| | - Alice L Pilo
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907-2084, USA
| | - Jiexun Bu
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907-2084, USA
| | - Scott A McLuckey
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907-2084, USA
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47
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Warneke J, Jenne C, Bernarding J, Azov VA, Plaumann M. Evidence for an intrinsic binding force between dodecaborate dianions and receptors with hydrophobic binding pockets. Chem Commun (Camb) 2016; 52:6300-3. [PMID: 27087168 DOI: 10.1039/c6cc01233g] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A gas phase binding study revealed strong intrinsic intermolecular interactions between dianionic halogenated closo-dodecaborates [B12X12](2-) and several neutral organic receptors. Oxidation of a tetrathiafulvalene host allowed switching between two host-guest binding modes in a supramolecular complex. Complexes of β-cyclodextrin with [B12F12](2-) show remarkable stability in the gas phase and were successfully tested as carriers for the delivery of boron clusters into cancer cells.
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Affiliation(s)
- Jonas Warneke
- Universität Bremen, Institut für Angewandte und Physikalische Chemie, Leobener Str. NW 2, D-28334 Bremen, Germany.
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48
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Malischewski M, Bukovsky EV, Strauss SH, Seppelt K. Jahn–Teller Effect in the B12F12 Radical Anion and Energetic Preference of an Octahedral B6(BF2)6 Cluster Structure over an Icosahedral Structure for the Elusive Neutral B12F12. Inorg Chem 2015; 54:11563-6. [DOI: 10.1021/acs.inorgchem.5b02256] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Moritz Malischewski
- Freie Universität Berlin, Institut für
Chemie und Biochemie, Fabeckstrasse 34-36, 14195 Berlin, Germany
| | - Eric V. Bukovsky
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523 United States
| | - Steven H. Strauss
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523 United States
| | - Konrad Seppelt
- Freie Universität Berlin, Institut für
Chemie und Biochemie, Fabeckstrasse 34-36, 14195 Berlin, Germany
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49
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Zhang Y, Liu J, Duttwyler S. Synthesis and Structural Characterization of Ammonio/Hydroxo Undecachloro-closo-Dodecaborates [B12Cl11NH3]-/[B12Cl11OH]2-and Their Derivatives. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501009] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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Fagiani MR, Liu Zeonjuk L, Esser TK, Gabel D, Heine T, Asmis KR, Warneke J. Opening of an icosahedral boron framework: A combined infrared spectroscopic and computational study. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.02.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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