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Mills HA, Alsarhan F, Ong TC, Gembicky M, Rheingold AL, Spokoyny AM. Icosahedral m-Carboranes Containing Exopolyhedral B-Se and B-Te Bonds. Inorg Chem 2021; 60:19165-19174. [PMID: 34855370 DOI: 10.1021/acs.inorgchem.1c02981] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Chalcogen-containing carboranes have been known for several decades and possess stable exopolyhedral B(9)-Se and B(9)-Te σ bonds despite the electron-donating ability of the B(9) vertex. While these molecules are known, little has been done to thoroughly evaluate their electrophilic and nucleophilic behavior. Herein, we report an assessment of the electrophilic reactivity of m-carboranylselenyl(II), -tellurenyl(II), and -tellurenyl(IV) chlorides and establish their reactivity pattern with Grignard reagents, alkenes, alkynes, enolates, and electron-rich arenes. These electrophilic reactions afford unique electron-rich B-Y-C (Y = Se, Te) bonding motifs not commonly found before. Furthermore, we show that m-carboranylselenolate, and even m-carboranyltellurolate, can be competent nucleophiles and participate in nucleophilic aromatic substitution reactions. Arene substitution chemistry is shown to be further extended to electron-rich species via palladium-mediated cross-coupling chemistry.
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Affiliation(s)
- Harrison A Mills
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Fadi Alsarhan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Ta-Chung Ong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Milan Gembicky
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States.,California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, California 90095, United States
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Application of Heteronuclear NMR Spectroscopy to Bioinorganic and Medicinal Chemistry ☆. REFERENCE MODULE IN CHEMISTRY, MOLECULAR SCIENCES AND CHEMICAL ENGINEERING 2018. [PMCID: PMC7157447 DOI: 10.1016/b978-0-12-409547-2.10947-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Selenium speciation in the Fountain Creek Watershed and its effects on fish diversity. J Biol Inorg Chem 2017; 22:751-763. [DOI: 10.1007/s00775-017-1457-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 04/11/2017] [Indexed: 10/19/2022]
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Wrackmeyer B, Klimkina EV. Reactivity of alkynylsilanes towards B-halogeno-1,3,2-diselenaborolanes with an annelated dicarba- closo-dodecaborane(12) unit. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2016. [DOI: 10.1515/znb-2016-0098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The C≡C bond of alkynylsilanes undergoes 1,2-haloboration with 2-halogeno-1,3,2-diselenaborolano-4,5-[1,2-dicarba-closo-dodecaborane(12)], in competition with reversible insertion into one of the B–Se bonds (selenoboration) to afford a seven-membered ring and finally, by elimination of Me3Si–X (X = Cl, Br, I), the corresponding B-alkynyl derivatives. The reactions were monitored by NMR spectroscopy (11B, 13C, 29Si and 77Se NMR). The proposed solution-state structures are also supported by DFT calculations of single molecule geometries and NMR parameters [B3LYP/6-311 + G(d,p) level of theory].
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Affiliation(s)
- Bernd Wrackmeyer
- Anorganische Chemie II, Universität Bayreuth, Universitätsstr. 30, D-95440 Bayreuth, Germany , Fax: +49-921-552157
| | - Elena V. Klimkina
- Anorganische Chemie II, Universität Bayreuth, Universitätsstr. 30, D-95440 Bayreuth, Germany
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Weekley CM, Shanu A, Aitken JB, Vogt S, Witting PK, Harris HH. XAS and XFM studies of selenium and copper speciation and distribution in the kidneys of selenite-supplemented rats. Metallomics 2014; 6:1602-15. [DOI: 10.1039/c4mt00088a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Se and Cu were colocalised in the kidneys of selenite-fed rats, but there was no evidence of Se–Cu bonding.
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Affiliation(s)
- Claire M. Weekley
- School of Chemistry and Physics
- The University of Adelaide
- , Australia
| | - Anu Shanu
- The Discipline of Pathology
- The University of Sydney
- , Australia
| | | | - Stefan Vogt
- X-Ray Science Division
- Advanced Photon Source
- Argonne National Laboratory
- Lemont, USA
| | - Paul K. Witting
- The Discipline of Pathology
- The University of Sydney
- , Australia
| | - Hugh H. Harris
- School of Chemistry and Physics
- The University of Adelaide
- , Australia
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Weekley CM, Harris HH. Which form is that? The importance of selenium speciation and metabolism in the prevention and treatment of disease. Chem Soc Rev 2013; 42:8870-94. [DOI: 10.1039/c3cs60272a] [Citation(s) in RCA: 371] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Selenium interactions and toxicity: a review. Cell Biol Toxicol 2011; 28:31-46. [DOI: 10.1007/s10565-011-9203-9] [Citation(s) in RCA: 180] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Accepted: 09/02/2011] [Indexed: 02/07/2023]
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