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Thompson BL, Kieffer IA, Heiden ZM. Utilization of BODIPY-based redox events to manipulate the Lewis acidity of fluorescent boranes. Chem Commun (Camb) 2022; 58:2646-2649. [PMID: 34981098 DOI: 10.1039/d1cc06400b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This report describes the implementation of a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) dye into the ligand framework of a borane. The redox-active nature of the BODIPY dye is utilized to generate a family of molecular boranes that are capable of exhibiting tunable Lewis acidities through BODIPY-based redox events.
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Affiliation(s)
- Brena L Thompson
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Ian A Kieffer
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Zachariah M Heiden
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
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2
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Golub IE, Filippov OA, Kulikova VA, Belkova NV, Epstein LM, Shubina ES. Thermodynamic Hydricity of Small Borane Clusters and Polyhedral closo-Boranes. Molecules 2020; 25:molecules25122920. [PMID: 32630429 PMCID: PMC7357072 DOI: 10.3390/molecules25122920] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 06/21/2020] [Accepted: 06/23/2020] [Indexed: 01/02/2023] Open
Abstract
Thermodynamic hydricity (HDAMeCN) determined as Gibbs free energy (ΔG°[H]−) of the H− detachment reaction in acetonitrile (MeCN) was assessed for 144 small borane clusters (up to 5 boron atoms), polyhedral closo-boranes dianions [BnHn]2−, and their lithium salts Li2[BnHn] (n = 5–17) by DFT method [M06/6-311++G(d,p)] taking into account non-specific solvent effect (SMD model). Thermodynamic hydricity values of diborane B2H6 (HDAMeCN = 82.1 kcal/mol) and its dianion [B2H6]2− (HDAMeCN = 40.9 kcal/mol for Li2[B2H6]) can be selected as border points for the range of borane clusters’ reactivity. Borane clusters with HDAMeCN below 41 kcal/mol are strong hydride donors capable of reducing CO2 (HDAMeCN = 44 kcal/mol for HCO2−), whereas those with HDAMeCN over 82 kcal/mol, predominately neutral boranes, are weak hydride donors and less prone to hydride transfer than to proton transfer (e.g., B2H6, B4H10, B5H11, etc.). The HDAMeCN values of closo-boranes are found to directly depend on the coordination number of the boron atom from which hydride detachment and stabilization of quasi-borinium cation takes place. In general, the larger the coordination number (CN) of a boron atom, the lower the value of HDAMeCN.
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Affiliation(s)
- Igor E Golub
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Oleg A Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Vasilisa A Kulikova
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
- Faculty of Chemistry, M.V. Lomonosov Moscow State University, 1/3 Leninskiye Gory, 119991 Moscow, Russia
| | - Natalia V Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Lina M Epstein
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Elena S Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
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3
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Thompson BL, Heiden ZM. Investigation of main group promoted carbon dioxide reduction. Tetrahedron 2019; 75:2099-2105. [PMID: 30936593 DOI: 10.1016/j.tet.2019.02.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The reduction of carbon dioxide (CO2) is of interest to the chemical industry, as many synthetic materials can be derived from CO2. To help determine the reagents needed for the functionalization of carbon dioxide this experimental and computational study describes the reduction of CO2 to formate and CO with hydride, electron, and proton sources in the presence of sterically bulky Lewis acids and bases. The insertion of carbon dioxide into a main group hydride, generating a main group formate, was computed to be more thermodynamically favorable for more hydridic (reducing) main group hydrides. A ten kcal/mol increase in hydricity (more reducing) of a main group hydride resulted in a 35% increase in the main group hydride's ability to insert CO2 into the main group hydride bond. The resulting main group formate exhibited a hydricity (reducing ability) about 10% less than the respective main group hydride prior to CO2 insertion. Coordination of a second identical Lewis acid to a main group formate complex further reduced the hydricity by about another 20%. The addition of electrons to the CO adduct of t Bu3P and B(C6F5)3 resulted in converting the sequestered CO2 molecule to CO. Reduction of the CO2 adduct of t Bu3P and B(C6F5)3 with both electrons and protons resulted in only proton reduction.
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Affiliation(s)
- Brena L Thompson
- Department of Chemistry, Washington State University, Pullman, WA 99164 USA
| | - Zachariah M Heiden
- Department of Chemistry, Washington State University, Pullman, WA 99164 USA
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Bateman CM, Beal H, Barker JE, Thompson BL, Donovan D, Grant BJ, Shooter J, Arakawa JH, Johnson S, Allen CJ, Yates JL, Kato R, Tinsley CWK, Zakharov LN, Abbey ER. One-Step Conversion of Potassium Organotrifluoroborates to Metal Organoborohydrides. Org Lett 2018; 20:3784-3787. [PMID: 29944380 DOI: 10.1021/acs.orglett.8b01373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This letter describes the one-step conversion of heteroatom-substituted potassium organotrifluoroborates (KRBF3) to metal monoorganoborohydrides (MRBH3) using alkali metal aluminum hydrides. The method tolerates a variety of functional groups, expanding MRBH3 diversity. Hydride removal with Me3SiCl in the presence of dimethylaminopyridine (DMAP) affords the organoborane·DMAP (RBH2·DMAP) adducts.
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Affiliation(s)
- Christopher M Bateman
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Hailey Beal
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Joshua E Barker
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Brena L Thompson
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Drake Donovan
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Bradley J Grant
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Jesse Shooter
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Jordan H Arakawa
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Spencer Johnson
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Caleb J Allen
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - James L Yates
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Ryota Kato
- Department of Chemistry for Materials , Mie University , Tsu , Mie 514-8507 , Japan
| | - Colby W K Tinsley
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
| | - Lev N Zakharov
- Department of Chemistry and Biochemistry, CAMCOR , University of Oregon , Eugene , Oregon 97403 , United States
| | - Eric R Abbey
- Department of Chemistry, Biochemistry, & Physics , Eastern Washington University , Cheney , Washington 99004 , United States
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Đorđević N, Ganguly R, Petković M, Vidović D. E–H (E = B, Si, C) Bond Activation by Tuning Structural and Electronic Properties of Phosphenium Cations. Inorg Chem 2017; 56:14671-14681. [DOI: 10.1021/acs.inorgchem.7b02579] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nemanja Đorđević
- SPMS-CBC, Nanyang Technological University, 21 Nanyang Link, Singapore 638737
| | - Rakesh Ganguly
- SPMS-CBC, Nanyang Technological University, 21 Nanyang Link, Singapore 638737
| | - Milena Petković
- Faculty
of Physical Chemistry, University of Belgrade, 11000 Belgrade, Republic of Serbia
| | - Dragoslav Vidović
- SPMS-CBC, Nanyang Technological University, 21 Nanyang Link, Singapore 638737
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Lathem AP, Rinne BL, Maldonado MA, Heiden ZM. Comparison of Intramolecular and Intermolecular Ammonium and Phosphonium Borohydrides in Hydrogen‐, Proton‐, and Hydride‐Transfer Reactions. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- A. Paige Lathem
- Department of Chemistry Washington State University 99164 Pullman WA USA
| | - Benjamin L. Rinne
- Department of Chemistry Washington State University 99164 Pullman WA USA
| | - Marc A. Maldonado
- Department of Chemistry Washington State University 99164 Pullman WA USA
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Rinne BL, Lathem AP, Heiden ZM. Influence of intramolecular vs. intermolecular phosphonium-borohydrides in catalytic hydrogen, hydride, and proton transfer reactions. Dalton Trans 2017; 46:9382-9393. [DOI: 10.1039/c7dt01693j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermodynamics of hydrogen, hydride, and proton transfer from 22 intramolecular and intermolecular phosphonium-borohydrides to eight substrates are described.
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Affiliation(s)
| | - A. Paige Lathem
- Department of Chemistry
- Washington State University
- Pullman
- USA
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8
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Heiden ZM, Lathem AP. Establishing the Hydride Donor Abilities of Main Group Hydrides. Organometallics 2015. [DOI: 10.1021/om5011512] [Citation(s) in RCA: 136] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Zachariah M. Heiden
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - A. Paige Lathem
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
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