1
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Wehmschulte RJ, Bayliss B, Reed S, Wesenberg C, Morgante P, Peverati R, Neal S, Chouinard CD, Tolosa D, Powell DR. Zinc Ammonio-dodecaborates: Synthesis, Lewis Acid Strength, and Reactivity. Inorg Chem 2022; 61:7032-7042. [PMID: 35471017 DOI: 10.1021/acs.inorgchem.2c00464] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Two series of zinc salts, [EtZn][A] and Zn[A]2, with weakly coordinating anions [A]- as counterions have been prepared, and their activities as catalysts for hydrosilylation reactions of 1-hexene, benzophenone, and acetophenone have been investigated. The counterions and per- and partially chlorinated 1-ammonio-closo-dodecaborate anions [Me3NB12Cl11]- [1]-, [Pr3NB12H5Cl6]- [2]-, [Bu3NB12H4Cl7]- [3]-, and [Hex3NB12H5Cl6]- [4]- were chosen as potential and more readily available alternatives to carborate anions such as [CHB11Cl11]- and [HexCB11Cl11]-. The basicity of anion [4]- was determined as being close to that of the triflimide anion [N(SO2CF3)2]-, and the fluoride ion affinities (FIAs) of compounds [EtZn][2] and Zn[2]2 are lower than those of the Lewis acids B(C6F5)3 and Zn[HexCB11Cl11]2. The higher anion basicity and the resulting lower Lewis acidity of the zinc centers result in low activity in 1-hexene hydrosilylation catalysis and only moderate activity in the hydrosilylation catalysis of benzophenone and acetophenone.
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Affiliation(s)
- Rudolf J Wehmschulte
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Brittany Bayliss
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Sydney Reed
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Corey Wesenberg
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Pierpaolo Morgante
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Roberto Peverati
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Shon Neal
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Christopher D Chouinard
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Daniela Tolosa
- Chemistry Program, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Douglas R Powell
- Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019-5251, United States
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2
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Synthesis and structure of 1-(p-cyanophenyl)-1-carba-closo-decaborate [1-(p-NCC6H4)-1-CB9H9]−. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3425-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Li S, Zhang Y, Ma Y, Qiu P, Chen X. Improved and Scalable Synthesis of [Et4N][closo-1-CHB9H9]. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00478] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shouhu Li
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yichun Zhang
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yiming Ma
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
| | - Pengtao Qiu
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuenian Chen
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
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4
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Berger A, Buckley CE, Paskevicius M. Synthesis of closo-CB 11H 12- Salts Using Common Laboratory Reagents. Inorg Chem 2021; 60:14744-14751. [PMID: 34514784 DOI: 10.1021/acs.inorgchem.1c01896] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Lithium and sodium salts of the closo-carbadodecaborate anion [CB11H12]- have been shown to form stable solid-state electrolytes with excellent ionic conductivity for all-solid-state batteries (ASSB). However, potential commercial application is currently hindered by the difficult, low-yielding, and expensive synthetic pathways. We report a novel and cost-effective method to synthesize the [CB11H12]- anion in a 40% yield from [B11H14]-, which can be synthesized using common laboratory reagents. The method avoids the use of expensive and dangerous reagents such as NaH, decaborane, and CF3SiMe3 and shows excellent reproducibility in product yield and purity.
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Affiliation(s)
- Amanda Berger
- Department of Physics and Astronomy, Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
| | - Craig E Buckley
- Department of Physics and Astronomy, Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
| | - Mark Paskevicius
- Department of Physics and Astronomy, Fuels and Energy Technology Institute, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
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5
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Abstract
The crystal structures of inorganic hydroborates (salts and coordination compounds with anions containing hydrogen bonded to boron) except for the simplest anion, borohydride BH4−, are analyzed regarding their structural prototypes found in the inorganic databases such as Pearson’s Crystal Data [Villars and Cenzual (2015), Pearson’s Crystal Data. Crystal Structure Database for Inorganic Compounds, Release 2019/2020, ASM International, Materials Park, Ohio, USA]. Only the compounds with hydroborate as the only type of anion are reviewed, although including compounds gathering more than one different hydroborate (mixed anion). Carbaborane anions and partly halogenated hydroborates are included. Hydroborates containing anions other than hydroborate or neutral molecules such as NH3 are not discussed. The coordination polyhedra around the cations, including complex cations, and the hydroborate anions are determined and constitute the basis of the structural systematics underlying hydroborates chemistry in various variants of anionic packing. The latter is determined from anion–anion coordination with the help of topology analysis using the program TOPOS [Blatov (2006), IUCr CompComm. Newsl. 7, 4–38]. The Pauling rules for ionic crystals apply only to smaller cations with the observed coordination number within 2–4. For bigger cations, the predictive power of the first Pauling rule is very poor. All non-molecular hydroborate crystal structures can be derived by simple deformation of the close-packed anionic lattices, i.e., cubic close packing (ccp) and hexagonal close packing (hcp), or body-centered cubic (bcc), by filling tetrahedral or octahedral sites. This review on the crystal chemistry of hydroborates is a contribution that should serve as a roadmap for materials engineers to design new materials, synthetic chemists in their search for promising compounds to be prepared, and materials scientists in understanding the properties of novel materials.
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6
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Shmal’ko AV, Sivaev IB. Chemistry of Carba-closo-decaborate Anions [CB9H10]– (Review). RUSS J INORG CHEM+ 2020. [DOI: 10.1134/s0036023619140067] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Pecyna J, Rončević I, Michl J. Insertion of Carbenes into Deprotonated nido-Undecaborane, B 11H 13(2-). Molecules 2019; 24:E3779. [PMID: 31640159 PMCID: PMC6833071 DOI: 10.3390/molecules24203779] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/09/2019] [Accepted: 10/09/2019] [Indexed: 11/17/2022] Open
Abstract
We have examined the insertion of carbenes carrying leaving groups into the [nido-B11H13]2- dianion to form the [closo-1-CB11H12]- anion. The best procedure uses CF3SiMe3 and LiCl as the source of CF2. It is simple, convenient and scalable and proceeds with 70-90% yield. Density functional calculations have been used to develop a mechanistic proposal that accounts for the different behavior of CF2, requiring only one equivalent of base for successful conversion of Na[nido-B11H14]- to [closo-1-CB11H12]-, and CCl2 and CBr2, which require more.
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Affiliation(s)
- Jacek Pecyna
- Department of Chemistry, University of Colorado, Boulder, CO 80309-0215, USA.
| | - Igor Rončević
- Institute of Organic Chemistry and Biochemistry Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic.
| | - Josef Michl
- Department of Chemistry, University of Colorado, Boulder, CO 80309-0215, USA.
- Institute of Organic Chemistry and Biochemistry Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic.
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8
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Lin F, Yu JL, Shen Y, Zhang SQ, Spingler B, Liu J, Hong X, Duttwyler S. Palladium-Catalyzed Selective Five-Fold Cascade Arylation of the 12-Vertex Monocarborane Anion by B–H Activation. J Am Chem Soc 2018; 140:13798-13807. [DOI: 10.1021/jacs.8b07872] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Furong Lin
- Department of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China
| | - Jing-Lu Yu
- Department of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China
| | - Yunjun Shen
- Department of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China
| | - Shuo-Qing Zhang
- Department of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China
| | - Bernhard Spingler
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China
| | - Xin Hong
- Department of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s Republic of China
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9
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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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10
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Liang X, Shen Y, Zhang K, Liu J, Duttwyler S. Rhodium(iii)-catalyzed dehydrogenative dialkenylation of the monocarba-closo-decaborate cluster by regioselective B–H activation. Chem Commun (Camb) 2018; 54:12451-12454. [DOI: 10.1039/c8cc05983g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The regioselective double B–H activation of the {CB9} carborane by rhodium catalysis is reported, affording novel inorganic–organic hybrid clusters.
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Affiliation(s)
- Xuewei Liang
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P. R. China
| | - Yunjun Shen
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P. R. China
| | - Kang Zhang
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P. R. China
| | - Jiyong Liu
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P. R. China
| | - Simon Duttwyler
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P. R. China
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11
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Lin F, Shen Y, Zhang Y, Sun Y, Liu J, Duttwyler S. Fusing Carborane Carboxylic Acids with Alkynes: 3D Analogues of Isocoumarins via Regioselective B−H Activation. Chemistry 2017; 24:551-555. [DOI: 10.1002/chem.201703802] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Furong Lin
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - Yunjun Shen
- Department of Chemistry; Zhejiang University; 38 Zheda Road 310027 Hangzhou P. R. China
| | - 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
| | - 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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12
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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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13
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Shen Y, Pan Y, Zhang K, Liang X, Liu J, Spingler B, Duttwyler S. B–H functionalization of the monocarba-closo-dodecaborate anion by rhodium and iridium catalysis. Dalton Trans 2017; 46:3135-3140. [DOI: 10.1039/c7dt00269f] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The regioselective derivatization of the monocarba-closo-dodecaborate anion via catalytic B–H bond activation is reported.
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Affiliation(s)
- Yunjun Shen
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Yani Pan
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Kang Zhang
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Xuewei Liang
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Jiyong Liu
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | | | - Simon Duttwyler
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
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14
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Saleh M, Powell DR, Wehmschulte RJ. Chlorination of 1-Carba-closo-dodecaborate and 1-Ammonio-closo-dodecaborate Anions. Inorg Chem 2016; 55:10617-10627. [DOI: 10.1021/acs.inorgchem.6b01867] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mahmoud Saleh
- Department of Chemistry, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
| | - Douglas R. Powell
- Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019-5251, United States
| | - Rudolf J. Wehmschulte
- Department of Chemistry, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, United States
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15
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Tok OL, Bakardjiev M, Štíbr B, Hnyk D, Holub J, Padělková Z, Růžička A. Click Dehydrogenation of Carbon-Substituted nido-5,6-C2B8H12 Carboranes: A General Route to closo-1,2-C2B8H10 Derivatives. Inorg Chem 2016; 55:8839-43. [PMID: 27551885 DOI: 10.1021/acs.inorgchem.6b01386] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Triethylamine-catalyzed dehydrogenation of carbon-disubstituted dicarbaboranes 5,6-R2-nido-5,6-C2B8H10 [1, where R = H (1a), Me (1b), and Ph (1c)] in refluxing acetonitrile leads to a high-yield (up to 85-95%) formation of a series of dicarbaboranes 1,2-R2-closo-1,2-C2B8H8 (2). The monosubstituted 6-R-nido-5,6-C2B8H11 (3) analogues [where R = Ph (3a), naph (1-naphthyl; 3b), Bu (3c)] afforded 1-R-1,2-closo C2B8H9 (4) isomers [where R = Ph (4a), naph (4b), n-Bu (4c)] as the main products; compounds 4a and 4c were accompanied by 2-R-1,2-C2B8H9 (5) isomers (total yields up to 90%), with the 4/5 molar ratio being strongly dependent on the nature of R (4:1 and 1:1, respectively). All of these cage-closure reactions are supposed to proceed via the stage of the corresponding Et3NH(+) salts of nido anions [5,6-R2-5,6-C2B8H9](-) (1(-)) and [6-R-5,6-C2B8H10](-) (3(-)), which lose H2 and Et3N upon heating (dehydrodeamination). The cage-closure mechanisms leading to closo isomers 2, 4, and 5 have been substantiated by B3LYP/6-31+G* calculations of the reaction profile for a simple 1a(-) → 2a + H(-) conversion. All of the compounds isolated have been characterized by multinuclear ((11)B, (1)H, and (13)C) NMR spectroscopy, mass spectrometry, and elemental analyses, and the structure of 1-Ph-closo-1,2-C2B8H9 (4a) was established by an X-ray diffraction study.
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Affiliation(s)
- Oleg L Tok
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic , 25068 Řež, Czech Republic
| | - Mario Bakardjiev
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic , 25068 Řež, Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic , 25068 Řež, Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic , 25068 Řež, Czech Republic
| | - Josef Holub
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic , 25068 Řež, Czech Republic
| | - Zdenka Padělková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice , Studentská 573, 53210 Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice , Studentská 573, 53210 Pardubice, Czech Republic
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16
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Affiliation(s)
- Naoki Tanaka
- Laboratory for Chemistry
and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yoshiaki Shoji
- Laboratory for Chemistry
and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Takanori Fukushima
- Laboratory for Chemistry
and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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17
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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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18
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Bakardjiev M, Štíbr B, Holub J, Padělková Z, Růžička A. Simple Synthesis, Halogenation, and Rearrangement of closo-1,6-C2B8H10. Organometallics 2015. [DOI: 10.1021/om500988z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mario Bakardjiev
- Institute of Inorganic
Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
| | - Bohumil Štíbr
- Institute of Inorganic
Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
| | - Josef Holub
- Institute of Inorganic
Chemistry, Academy of Sciences of the Czech Republic, 250 68 Řež, Czech Republic
| | - Zdenka Padělková
- Department of General and Inorganic Chemistry, Faculty of Chemical
Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical
Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
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19
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Bolli C, Derendorf J, Jenne C, Scherer H, Sindlinger CP, Wegener B. Synthesis and Properties of the Weakly Coordinating Anion [Me
3
NB
12
Cl
11
]
−. Chemistry 2014; 20:13783-92. [DOI: 10.1002/chem.201403625] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Christoph Bolli
- Fachbereich C – Anorganische Chemie, Bergische Universität Wuppertal, Gaussstrasse 20, 42119 Wuppertal (Germany), Fax: (+49) 202‐439‐3503
| | - Janis Derendorf
- Fachbereich C – Anorganische Chemie, Bergische Universität Wuppertal, Gaussstrasse 20, 42119 Wuppertal (Germany), Fax: (+49) 202‐439‐3503
| | - Carsten Jenne
- Fachbereich C – Anorganische Chemie, Bergische Universität Wuppertal, Gaussstrasse 20, 42119 Wuppertal (Germany), Fax: (+49) 202‐439‐3503
| | - Harald Scherer
- Institut für Anorganische und Analytische Chemie, Albert‐Ludwigs Universität Freiburg (Germany)
| | | | - Bianca Wegener
- Fachbereich C – Anorganische Chemie, Bergische Universität Wuppertal, Gaussstrasse 20, 42119 Wuppertal (Germany), Fax: (+49) 202‐439‐3503
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20
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Douvris C, Michl J. Update 1 of:Chemistry of the Carba-closo-dodecaborate(−) Anion, CB11H12–. Chem Rev 2014; 113:PR179-233. [PMID: 23944158 DOI: 10.1021/cr400059k] [Citation(s) in RCA: 159] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christos Douvris
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, 16610 Prague, Czech Republic
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Josef Michl
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, 16610 Prague, Czech Republic
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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21
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Ringstrand B, Kaszynski P. Functionalization of the [closo-1-CB9H10]- anion for the construction of new classes of liquid crystals. Acc Chem Res 2013; 46:214-25. [PMID: 23098274 DOI: 10.1021/ar300081b] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The [closo-1-CB(9)H(10)](-) anion is a member of an extensive family of σ-aromatic closo-boranes that possess impressive stability and functionalization characteristics. In contrast to its bigger, more extensively studied brother, the [closo-1-CB(11)H(12)](-) anion, convenient access to the [closo-1-CB(9)H(10)](-) anion has only been recently established, and researchers have only begun to develop and understand its fundamental chemistry. The geometrical and electronic properties of the [closo-1-CB(9)H(10)](-) anion make it an attractive structural element of novel classes of either zwitterionic or ionic liquid crystals suitable for electro-optical and ion transport applications, respectively. Such materials require a 1,10-difunctionalized [closo-1-CB(9)H(10)](-) anion that permits for the formation of molecules of elongated shape. The covalent attachment of an onium fragment or the use of a counterion compensates for the negative charge. This Account highlights the progress made in the advancement and understanding of the fundamental chemistry of the [closo-1-CB(9)H(10)](-) anion. We also describe the development of 1,10-difunctionalized derivatives as key intermediates in the preparation of new classes of liquid crystalline materials. We obtained the first isomerically pure 1,10-difunctionalized derivative of the [closo-1-CB(9)H(10)](-) anion, iodo acid [closo-1-CB(9)H(8)-1-COOH-10-I](-), from decaborane through the Brellochs reaction. Functional group transformation of the C(1)-carboxyl group led to a 1-amino derivative and, subsequently, to a synthetically valuable 1-dinitrogen derivative. The latter exhibits reactivity typical for PhN(2)(+) and undergoes diazocoupling and Gomberg-Bachmann arylation reactions. The B(10)-iodine participated in Negishi alkylation and Buchwald-Hartwig amination reactions, leading to 10-hexyl and 10-amino carboxylic acids, respectively. We converted the 10-amino carboxylic acid to a 10-dinitrogen acid [closo-1-CB(9)H(8)-1-COOH-10-N(2)], which proved to be synthetically valuable in the preparation of 10-pyridinium and 10-sulfonium zwitterionic acids and their liquid crystalline esters. We investigated several intermediates using structural, spectroscopic, and kinetic methods.
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Affiliation(s)
- Bryan Ringstrand
- Organic Materials Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Piotr Kaszynski
- Organic Materials Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Faculty of Chemistry, University of Łódź, Tamka 12, 91403 Łódź, Poland
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Boeré RT, Bolli C, Finze M, Himmelspach A, Knapp C, Roemmele TL. Quantum-Chemical and Electrochemical Investigation of the Electrochemical Windows of Halogenated Carborate Anions. Chemistry 2012; 19:1784-95. [DOI: 10.1002/chem.201202475] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 10/05/2012] [Indexed: 11/07/2022]
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Bragin VI, Korlyukov AA, Petrovskii PV, Sivaev IB, Bregadze VI. Synthesis and structure of fluorophenyl derivatives of the 10-vertex monocarbaborane anions [1-CB9H10]− and [2-CB9H10]−. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2012.06.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ringstrand B, Jankowiak A, Johnson LE, Kaszynski P, Pociecha D, Górecka E. Anion-driven mesogenicity: a comparative study of ionic liquid crystals based on the [closo-1-CB9H10]− and [closo-1-CB11H12]− clusters. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15448j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Farràs P, Viñas C, Sillanpää R, Teixidor F, Rey M. The nature of the chlorination reaction in [1-C6H5-1-CB9H9]− boron clusters. Dalton Trans 2010; 39:7684-91. [DOI: 10.1039/c0dt00433b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Finze M, Sprenger JAP, Schaack BB. Salts of the 1-cyanocarba-closo-dodecaborate anions [1-NC-closo-1-CB11X11]− (X = H, F, Cl, Br, I). Dalton Trans 2010; 39:2708-16. [DOI: 10.1039/b922720b] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Finze M, Sprenger J. Anionic Gold(I) Complexes-Twelve- and Ten-Vertex Monocarba-closo-borate Anions with Carbon-Gold σ Bonds. Chemistry 2009; 15:9918-27. [DOI: 10.1002/chem.200901130] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Körbe S, Schreiber PJ, Michl J. Chemistry of the Carba-closo-dodecaborate(−) Anion, CB11H12-. Chem Rev 2006; 106:5208-49. [PMID: 17165686 DOI: 10.1021/cr050548u] [Citation(s) in RCA: 218] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefanie Körbe
- Institute of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic, 16610 Prague, Czech Republic
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Moxham GL, Douglas TM, Brayshaw SK, Kociok-Köhn G, Lowe JP, Weller AS. The role of halogenated carborane monoanions in olefin hydrogenation catalysed by cationic iridium phosphine complexes. Dalton Trans 2006:5492-505. [PMID: 17117219 DOI: 10.1039/b612049k] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iridium hydridophosphine complexes of general formula [Ir(PR3)2H2(anion)](PR3= PPh3, PMe2Ph; anion =[1-closo-CB(11)H(6)Cl(6)]-, [1-closo-CB(11)H(6)I(6)]-, [BAr(F)4]-) have been prepared by hydrogenation of cyclooctadiene precursor complexes. Solid-state structures of selected examples of these complexes reveal intimate contacts between the carborane anion and cation, with the anion binding through two lower-hemisphere halogen ligands. In CD2Cl2 solution the very weakly coordinating anions [1-closo-CB(11)H(6)Cl(6)]- and [BAr(F)4]- are suggested to favour the formation of solvent complexes such as [Ir(PR3)2H2(solvent)n][anion], while the [1-closo-CB(11)H(6)I(6)]- anion forms a tightly bound complex with the cationic iridium fragment. Calculated DeltaG values for anion reorganisation in d8-toluene reflect this difference in interaction between the anions and cation. With the bulky anion [1-closo-CB(11)Me(5)I(6)]- different complexes are formed: Ir(PPh3)H2(1-closo-HCB(11)Me(5)I(6)) and [(PPh3)3Ir(H2)H2][1-closo-HCB(11)Me(5)I(6)] which have been characterised spectroscopically. Diffusion measurements in CD2Cl2 are also consistent with larger, solvent coordinated, complexes for the more weakly coordinating anions and a tighter interaction between anion and cation for [1-closo-CB(11)H(6)I(6)]-. All the complexes show some ion-paring in solution. Comparison with data previously reported for the [1-closo-CB(11)H(6)Br(6)]- anion shows that this anion--as expected--fits between [1-closo-CB(11)H(6)Cl(6)]- and [1-closo-CB(11)H(6)I(6)]- in terms of coordinating ability. Although not coordinating, the large [1-closo-CB(11)H(6)Cl(6)]- and [BAr(F)4)]- anions do provide some stabilisation towards the metal centre, as decomposition to the hydride bridged dimer [Ir2(PPh3)4H5]+ is retarded. This is in contrast to the [PF6]- salt where decomposition is immediate. As expected, complexes with the smaller phosphine PMe2Ph form tighter interactions with the carborane anions. These observations on the interaction between anion and cation in solution are reflected in benchmark hydrogenation studies that show a significant attenuation in rate of hydrogenation of cyclohexane on using the [1-closo-CB(11)H(6)I(6)]- anion or complexes with the PMe2Ph phosphine. We also comment on the reusability of the catalysts and their tolerance to water and oxygen impurities. Overall the catalyst with the [1-closo-CB(11)H(6)Br(6)]- anion shows the best combination of rate of hydrogenation, reusability and tolerance to impurities.
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Affiliation(s)
- Gemma L Moxham
- Department of Chemistry, University of Bath, Bath, UKBA2 7AY
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