1
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Jurt P, Gamboa-Carballo JJ, Schweinzer C, Himmelbauer D, Thöny D, Gianetti TL, Trincado M, Grützmacher H. Selective dehydrogenation of ammonia borane to borazine and derivatives by rhodium olefin complexes. Dalton Trans 2024; 53:14212-14218. [PMID: 39140315 PMCID: PMC11323292 DOI: 10.1039/d4dt01520g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 07/24/2024] [Indexed: 08/15/2024]
Abstract
This report presents a selective synthetic approach towards borazine from ammonia borane using a dinuclear rhodium olefin homogeneous catalyst. The synthesis and spectroscopic characterization of a dirhodium ammonia borane complex as an intermediate provides insight into a possible mode of activation.
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Affiliation(s)
- Pascal Jurt
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
| | - Juan José Gamboa-Carballo
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
- Higher Institute of Technologies and Applied Sciences (InSTEC), University of Havana, Ave. S. Allende 1110, 10600 Havana, Cuba
| | - Clara Schweinzer
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
| | - Daniel Himmelbauer
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, A-1060 Vienna, Austria
| | - Debora Thöny
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
| | - Thomas L Gianetti
- Department of Chemistry and Biochemistry, University of Arizona, University Blvd., Tucson, AZ 85719, USA.
| | - Monica Trincado
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, CH-8049 Zurich, Switzerland.
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2
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Greño M, Pérez-Redondo A, Torrijos J, Varela-Izquierdo V, Yélamos C. Half-Sandwich Zirconium and Hafnium Amidoborane Complexes: Precursors of Hydride Derivatives. Inorg Chem 2024; 63:6576-6588. [PMID: 38567753 PMCID: PMC11022180 DOI: 10.1021/acs.inorgchem.3c02826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 03/08/2024] [Accepted: 03/13/2024] [Indexed: 04/16/2024]
Abstract
Half-sandwich zirconium(IV) and hafnium(IV) complexes with amidoborane and hydride ligands have been isolated in the stoichiometric reactions of mono(pentamethylcyclopentadienyl)metal alkyl and amido derivatives with the amine-boranes NHR2BH3 (R2 = H2, Me2, HtBu). Treatment of the tris(trimethylsilylmethyl) complexes [M(η5-C5Me5)(CH2SiMe3)3] with NH3BH3 (3 equiv) gives the seven-coordinate species [M(η5-C5Me5)(NH2BH3)3] (M = Zr (1), Hf (2)) with three κ2N,H-NH2BH3 ligands. The tris(neophyl) [M(η5-C5Me5)(CH2CMe2Ph)3] or tris(dimethylamido) [M(η5-C5Me5)(NMe2)3] derivatives react with NHMe2BH3 (≥3 equiv) to afford bis(dimethylamidoborane) hydride complexes [M(η5-C5Me5)H(NMe2BH3)2] (M = Zr (3), Hf (4)) via thermally unstable [M(η5-C5Me5)(NMe2BH3)3] species. The reaction of [M(η5-C5Me5)(NMe2)3] and NH2tBuBH3 (≥4 equiv) affords analogous mixed amidoborane hydride derivatives [M(η5-C5Me5)H(NHtBuBH3)(NMe2BH3)] (M = Zr (5), Hf (6)) with κ2N,H-NHtBuBH3 and κ3N,H,H-NMe2BH3 ligands. The addition of NHR2BH3 (≥1 equiv) on the mono(dimethylamido) complexes [M(η5-C5Me5)Cl2(NMe2)] in hexane leads to the precipitation of the ionic compounds [(NHR2)2BH2][{M(η5-C5Me5)Cl2}2(μ-H)3] (R2 = Me2, M = Zr (7), Hf (8); R2 = HtBu, M = Zr (9), Hf (10)). Molecular hydride species [Cl2(η5-C5Me5)M(μ-Cl)(μ-H)2M(η5-C5Me5)Cl(NH2tBu)] (M = Zr (11), Hf (12)) could be isolated from mixtures of complexes [M(η5-C5Me5)Cl2(NMe2)] and lower ratios of NH2tBuBH3. The zirconium complex 11 decomposes in solution to give the mononuclear tert-butylamido derivative [Zr(η5-C5Me5)Cl2(NHtBu)] (13) along with other byproducts.
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Affiliation(s)
- Maider Greño
- Departamento de Química
Orgánica y Química Inorgánica, Instituto de Investigación
Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
| | - Adrián Pérez-Redondo
- Departamento de Química
Orgánica y Química Inorgánica, Instituto de Investigación
Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
| | - José Torrijos
- Departamento de Química
Orgánica y Química Inorgánica, Instituto de Investigación
Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
| | - Víctor Varela-Izquierdo
- Departamento de Química
Orgánica y Química Inorgánica, Instituto de Investigación
Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
| | - Carlos Yélamos
- Departamento de Química
Orgánica y Química Inorgánica, Instituto de Investigación
Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
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3
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Himmelbauer D, Müller F, Schweinzer C, Casas F, Pribanic B, Le Corre G, Thöny D, Trincado M, Grützmacher H. Selective dehydrogenation of ammonia borane to polycondensated BN rings catalysed by ruthenium olefin complexes. Chem Commun (Camb) 2024; 60:885-888. [PMID: 38165285 PMCID: PMC10795514 DOI: 10.1039/d3cc05709g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 12/14/2023] [Indexed: 01/03/2024]
Abstract
Dehydrogenation of ammonia borane to well-defined products is an important but challenging reaction. A dinuclear ruthenium complex with a Ru-Ru bond bearing a diazadiene (dad) unit and olefins as non-innocent ligands catalyzes the highly selective formation of conjugated polycondensed borazine oligomers (BxNxHy), predominantly B21N21H18, the BN analogue of superbenzene.
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Affiliation(s)
- Daniel Himmelbauer
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163Vienna A-1060Austria
| | - Fabian Müller
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
| | - Clara Schweinzer
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
| | - Fernando Casas
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
| | - Bruno Pribanic
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
| | - Grégoire Le Corre
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
| | - Debora Thöny
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
| | - Monica Trincado
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences, ETH Zurich Vladimir-Prelog-Weg 1Zurich CH-8049Switzerlandtrincado@inorg,chem.ethz.ch
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4
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Hinojosa-Nava R, Mejía-Uriarte EV, Vázquez-Olmos AR, Sato-Berrú RY. Study of the first step of hydrogen release in ammonia borane using high-resolution Raman spectroscopy and different heating ramps. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 284:121776. [PMID: 36070673 DOI: 10.1016/j.saa.2022.121776] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 08/08/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
Ammonia borane, as a source of hydrogen, has attracted much attention due to its high hydrogen content, low molecular weight, and high stability in solution. However, the process and enhancement of hydrogen release must be done practically under ambient conditions. For this work, Raman spectroscopy, principal component analysis (PCA), and molecular simulation were applied to study the hydrogen release process of ammonia borane. Three stages of release were observed from room temperature to 1300 °C. The shift, the appearance, and the disappearance of the Raman bands were evident in the whole process. In-situ monitoring of Raman and PCA, with four different heating rates between 70 and 130 °C, was done; ammonia borane showed visible variations in its first release step, in which a fast rate helped reduce distortion in the release process. Finally, molecular simulation of ammonia borane using the Density Functional Theory (DFT) in calculations showed that dihedral rotation and stretching of the hydrogen bonds can occur before the first release step.
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Affiliation(s)
- R Hinojosa-Nava
- Instituto de Ciencias Aplicadas y Tecnología (UNAM); Facultad de Ciencias (UNAM), Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, 04510, México City, México.
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5
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Nuñez Bahena E, Schafer LL. From Stoichiometric to Catalytic E–H Functionalization by Non-Metallocene Zirconium Complexes─Recent Advances and Mechanistic Insights. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Erick Nuñez Bahena
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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6
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Bhattacharjee I, Sultana M, Bhunya S, Paul A. The curious saga of dehydrogenation/hydrogenation for chemical hydrogen storage: a mechanistic perspective. Chem Commun (Camb) 2022; 58:1672-1684. [PMID: 35024699 DOI: 10.1039/d1cc06238g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen storage is an indispensable component of hydrogen-based fuel economy. Chemical hydrogen storage relies on the development of lightweight compounds which can deliver high weight percentage of H2 at moderate temperatures through dehydrogenation and can be recovered from the dehydrogenated mass by hydrogenation for reuse. In this feature article we primarily discuss the mechanistic underpinnings of the catalytic dehydrogenation of ammonia-borane, a potential candidate for hydrogen storage and the challenges associated with its regeneration from the dehydrogenated mass. Moreover, we highlight the mechanistic intricacies, viability, sustainability and unresolved issues of allied chemical hydrogen storage avenues such as the CH3OH-CO2 cycle.
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Affiliation(s)
| | - Munia Sultana
- Indian Association for the Cultivation of Science, Kolkata, India.
| | - Sourav Bhunya
- Indian Association for the Cultivation of Science, Kolkata, India.
| | - Ankan Paul
- Indian Association for the Cultivation of Science, Kolkata, India.
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7
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Zhou L, Zhang D, Hu J, Wu Y, Geng J, Hu X. Thermal Dehydrogenation and Hydrolysis of BH3NH3 Catalyzed by Cyclic (Alkyl)(amino)carbene Iridium Complexes under Mild Conditions. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00302] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Lei Zhou
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Dejin Zhang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Jinling Hu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Youting Wu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Jiao Geng
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Xingbang Hu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
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8
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Roy B, Pal U, Bishnoi A, O'Dell LA, Sharma P. Exploring the homopolar dehydrocoupling of ammonia borane by solid-state multinuclear NMR spectroscopy. Chem Commun (Camb) 2021; 57:1887-1890. [PMID: 33491684 DOI: 10.1039/d0cc06184k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solid-state 1H-14NOT HMQC, 11B MQMAS and 1H-11B HETCOR NMR experiments are used to explore the role of homopolar B-B interaction in the thermal dehydrogenation of pure and supported ammonia borane, which is considered as one of the most promising hydrogen storage materials. This work also addresses the subtlety of the homopolar interactions in amine borane compounds, and how they differ from their heteropolar counterparts.
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Affiliation(s)
- Binayak Roy
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, India. and School of Chemistry, Monash University, Clayton, Australia
| | - Urbi Pal
- Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Australia
| | - Ankita Bishnoi
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, India.
| | - Luke A O'Dell
- Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Australia
| | - Pratibha Sharma
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, India.
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9
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Demirci UB. Mechanistic insights into the thermal decomposition of ammonia borane, a material studied for chemical hydrogen storage. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01366h] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We have now a better understanding of the mechanisms of thermal decomposition of ammonia borane, a widely studied hydrogen storage material.
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Affiliation(s)
- Umit B. Demirci
- Institut Européen des Membranes
- IEM – UMR 5635
- ENSCM
- CNRS
- Univ Montpellier
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10
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Nugent JW, García-Melchor M, Fout AR. Cobalt-Catalyzed Ammonia Borane Dehydrogenation: Mechanistic Insight and Isolation of a Cobalt Hydride-Amidoborane Complex. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00459] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Joseph W. Nugent
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Max García-Melchor
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Alison R. Fout
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Matthews Avenue, Urbana, Illinois 61801, United States
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11
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Yempally V, Moncho S, Wang Y, Kyran SJ, Fan WY, Brothers EN, Darensbourg DJ, Bengali AA. Thermal Dehydrogenation of Dimethylamine Borane Catalyzed by a Bifunctional Rhenium Complex. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00115] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Salvador Moncho
- Department of Chemistry, Texas A&M University at Qatar, Doha, Qatar
| | - Yanyan Wang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Samuel J. Kyran
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Wai Yip Fan
- Department of Chemistry, National University of Singapore, Singapore 117543
| | | | - Donald J. Darensbourg
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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12
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Han D, Anke F, Trose M, Beweries T. Recent advances in transition metal catalysed dehydropolymerisation of amine boranes and phosphine boranes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Li MW, Zimmerman PM. Stepwise basis set selection. J Comput Chem 2018; 39:2153-2162. [DOI: 10.1002/jcc.25363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 05/01/2018] [Indexed: 11/08/2022]
Affiliation(s)
- M. W. Li
- Department of ChemistryUniversity of Michigan930 N. University Ave, Ann Arbor MI48109
| | - P. M. Zimmerman
- Department of ChemistryUniversity of Michigan930 N. University Ave, Ann Arbor MI48109
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14
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Ma G, Song G, Li ZH. Designing Metal-Free Frustrated Lewis Pairs Catalyst for the Efficient Dehydrogenation of Ammonia Borane. Chemistry 2018; 24:13238-13245. [PMID: 29938854 DOI: 10.1002/chem.201801932] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/13/2018] [Indexed: 01/08/2023]
Abstract
Ammonia borane (AB) has been in the spotlight for the chemical storage of hydrogen over the past decade. However, the development of methods for efficient and controlled hydrogen release from AB under mild conditions is still underway. Herein, using density functional theory (DFT) computations, we designed a metal-free frustrated Lewis pair (FLP) catalyst o-(BPh2 )C6 H4 (NiPr2 ) (M1) that can efficiently dehydrogenate AB to release more than two equivalents of H2 under mild conditions. Catalyst M1 can dehydrogenate not only AB to H2 N=BH2 (AOB) and H2 , but also oligomers of AOB with rather low free-energy barriers. The high dehydrogenation activity of M1 is the key of new oligomerization routes to the efficient dehydrogenation of AB to borazine (BZ) or H2 B-(NH=BH)n -NH2 (PIB) and finally to polyborazylene (PBZ) so that more than two equivalents of H2 can be released. A first-principle kinetic Monte Carlo (KMC) study reveals that the activity of our catalytic system can be tuned by varying the initial concentration of M1 and AB. This work can guide the design of catalyst for the highly efficient utilization of AB as a hydrogen storage material.
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Affiliation(s)
- Gongli Ma
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 200438, Shanghai, P.R. China
| | - Guoliang Song
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 200438, Shanghai, P.R. China
| | - Zhen Hua Li
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 200438, Shanghai, P.R. China
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15
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Winner L, Ewing WC, Geetharani K, Dellermann T, Jouppi B, Kupfer T, Schäfer M, Braunschweig H. Spontaner metallfreier Wasserstofftransfer zwischen Amminboranen und Iminoboranen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807435] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lena Winner
- Institut für Anorganische Chemie und Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - William C. Ewing
- Boron Specialties, LLC; 2301 Duss Ave., Box 35 Ambridge PA 15003 USA
| | - K. Geetharani
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; Bangalore- 560012 Indien
| | - Theresa Dellermann
- Institut für Anorganische Chemie und Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - Brian Jouppi
- Boron Specialties, LLC; 2301 Duss Ave., Box 35 Ambridge PA 15003 USA
| | - Thomas Kupfer
- Institut für Anorganische Chemie und Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - Marius Schäfer
- Institut für Anorganische Chemie und Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - Holger Braunschweig
- Institut für Anorganische Chemie und Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
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16
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Winner L, Ewing WC, Geetharani K, Dellermann T, Jouppi B, Kupfer T, Schäfer M, Braunschweig H. Spontaneous Metal-Free Transfer Hydrogenation of Iminoboranes with Ammonia Borane and Amine Boranes. Angew Chem Int Ed Engl 2018; 57:12275-12279. [DOI: 10.1002/anie.201807435] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Lena Winner
- Institut for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - William C. Ewing
- Boron Specialties, LLC; 2301 Duss Ave., Box 35 Ambridge PA 15003 USA
| | - K. Geetharani
- Department of Inorganic and Physical Chemistry; Indian Institute of Science; Bangalore- 560012 India
| | - Theresa Dellermann
- Institut for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Brian Jouppi
- Boron Specialties, LLC; 2301 Duss Ave., Box 35 Ambridge PA 15003 USA
| | - Thomas Kupfer
- Institut for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Marius Schäfer
- Institut for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Holger Braunschweig
- Institut for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
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17
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18
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19
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Adams GM, Colebatch AL, Skornia JT, McKay AI, Johnson HC, Lloyd−Jones GC, Macgregor SA, Beattie NA, Weller AS. Dehydropolymerization of H3B·NMeH2 To Form Polyaminoboranes Using [Rh(Xantphos-alkyl)] Catalysts. J Am Chem Soc 2018; 140:1481-1495. [DOI: 10.1021/jacs.7b11975] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gemma M. Adams
- Chemistry Research Laboratories, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Annie L. Colebatch
- Chemistry Research Laboratories, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Joseph T. Skornia
- Chemistry Research Laboratories, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Alasdair I. McKay
- Chemistry Research Laboratories, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Heather C. Johnson
- Chemistry Research Laboratories, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Guy C. Lloyd−Jones
- School
of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, United Kingdom
| | - Stuart A. Macgregor
- Institute
of Chemical Sciences, Heriot Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Nicholas A. Beattie
- Institute
of Chemical Sciences, Heriot Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Andrew S. Weller
- Chemistry Research Laboratories, Mansfield Road, Oxford OX1 3TA, United Kingdom
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20
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Roy B, Hajari A, Manna J, Sharma P. Supported ammonia borane decomposition through enhanced homopolar B–B coupling. Dalton Trans 2018; 47:6570-6579. [DOI: 10.1039/c8dt00789f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermolytic decomposition of ammonia borane (AB) is known to proceed through the polymeric coupling reaction between –BH3 and –NH3 sites of multiple ammonia borane molecules, which results in the release of hydrogen and other by-products, e.g., ammonia, diborane and borazine.
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Affiliation(s)
- Binayak Roy
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Animesh Hajari
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Joydev Manna
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Pratibha Sharma
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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21
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Roy B, Manna J, Pal U, Hajari A, Bishnoi A, Sharma P. An in situ study on the solid state decomposition of ammonia borane: unmitigated by-product suppression by a naturally abundant layered clay mineral. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00682a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Borazine is a by-product often encountered in the thermal decomposition of ammonia borane, which leads to an inescapable hindrance towards sustainability and cost effectiveness.
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Affiliation(s)
- Binayak Roy
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Joydev Manna
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Urbi Pal
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Animesh Hajari
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Ankita Bishnoi
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Pratibha Sharma
- Department of Energy Science and Engineering
- Indian Institute of Technology Bombay
- Mumbai
- India
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22
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Coles NT, Webster RL. Iron Catalyzed Dehydrocoupling of Amine- and Phosphine-Boranes. Isr J Chem 2017; 57:1070-1081. [PMID: 29497210 PMCID: PMC5820755 DOI: 10.1002/ijch.201700018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 07/07/2017] [Indexed: 11/21/2022]
Abstract
Catalytic dehydrocoupling methodologies, whereby dihydrogen is released from a substrate (or intermolecularly from two substrates) is a mild and efficient method to construct main group element-main group element bonds, the products of which can be used in advanced materials, and also for the development of hydrogen storage materials. With growing interest in the potential of compounds such as ammonia-borane to act as hydrogen storage materials which contain a high weight% of H2, along with the current heightened interest in base metal catalyzed processes, this review covers recent developments in amine and phosphine dehydrocoupling catalyzed by iron complexes. The complexes employed, products formed and mechanistic proposals will be discussed.
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Affiliation(s)
- Nathan T. Coles
- Department of ChemistryUniversity of BathClaverton DownBathUK.BA2 7AY.
| | - Ruth L. Webster
- Department of ChemistryUniversity of BathClaverton DownBathUK.BA2 7AY.
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23
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Das UK, Daifuku SL, Iannuzzi TE, Gorelsky SI, Korobkov I, Gabidullin B, Neidig ML, Baker RT. Iron(II) Complexes of a Hemilabile SNS Amido Ligand: Synthesis, Characterization, and Reactivity. Inorg Chem 2017; 56:13766-13776. [PMID: 29112382 DOI: 10.1021/acs.inorgchem.7b01802] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We report an easily prepared bis(thioether) amine ligand, SMeNHSMe, along with the synthesis, characterization, and reactivity of the paramagnetic iron(II) bis(amido) complex, [Fe(κ3-SMeNSMe)2] (1). Binding of the two different thioethers to Fe generates both five- and six-membered rings with Fe-S bonds in the five-membered rings (av 2.54 Å) being significantly shorter than those in the six-membered rings (av 2.71 Å), suggesting hemilability of the latter thioethers. Consistent with this hypothesis, magnetic circular dichroism (MCD) and computational (TD-DFT) studies indicate that 1 in solution contains a five-coordinate component [Fe(κ3-SMeNSMe)(κ2-SMeNSMe)] (2). This ligand hemilability was demonstrated further by reactivity studies of 1 with 2,2'-bipyridine, 1,2-bis(dimethylphosphino)ethane, and 2,6-dimethylphenyl isonitrile to afford iron(II) complexes [L2Fe(κ2-SMeNSMe)2] (3-5). Addition of a Brønsted acid, HNTf2, to 1 produces the paramagnetic, iron(II) amine-amido cation, [Fe(κ3-SMeNSMe)(κ3-SMeNHSMe)](NTf2) (6; Tf = SO2CF3). Cation 6 readily undergoes amine ligand substitution by triphos, affording the 16e- complex [Fe(κ2-SMeNSMe)(κ3-triphos)](NTf2) (7; triphos = bis(2-diphenylphosphinoethyl)phenylphosphine). These complexes are characterized by elemental analysis; 1H NMR, Mössbauer, IR, and UV-vis spectroscopy; and single-crystal X-ray diffraction. Preliminary results of amine-borane dehydrogenation catalysis show complex 7 to be a selective and particularly robust precatalyst.
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Affiliation(s)
- Uttam K Das
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Stephanie L Daifuku
- Department of Chemistry, University of Rochester , Rochester, New York 14627, United States
| | - Theresa E Iannuzzi
- Department of Chemistry, University of Rochester , Rochester, New York 14627, United States
| | - Serge I Gorelsky
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Ilia Korobkov
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Bulat Gabidullin
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
| | - Michael L Neidig
- Department of Chemistry, University of Rochester , Rochester, New York 14627, United States
| | - R Tom Baker
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa , Ottawa, Ontario K1N 6N5, Canada
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24
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Pagano JK, Bange CA, Farmiloe SE, Waterman R. Visible Light Photocatalysis Using a Commercially Available Iron Compound. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00499] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Justin K. Pagano
- Department of Chemistry, University of Vermont, Discovery Hall, Burlington, Vermont 05401, United States
| | - Christine A. Bange
- Department of Chemistry, University of Vermont, Discovery Hall, Burlington, Vermont 05401, United States
| | - Sarah E. Farmiloe
- Department of Chemistry, University of Vermont, Discovery Hall, Burlington, Vermont 05401, United States
| | - Rory Waterman
- Department of Chemistry, University of Vermont, Discovery Hall, Burlington, Vermont 05401, United States
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25
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Greño M, Horno ED, Mena M, Pérez-Redondo A, Varela-Izquierdo V, Yélamos C. Group 4 Half-Sandwich Tris(trimethylsilylmethyl) Complexes: Thermal Decomposition and Reactivity with N,N-Dimethylamine-Borane. Inorg Chem 2017; 56:11220-11229. [PMID: 28849636 DOI: 10.1021/acs.inorgchem.7b01607] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The thermal decomposition of group 4 trimethylsilylmethyl derivatives [M(η5-C5Me5)(CH2SiMe3)3] (M = Ti (1), Zr (2), Hf (3)) in solution and their reactivity with N,N-dimethylamine-borane were investigated. Heating of hydrocarbon solutions of compounds 2 and 3 at 130-200 °C results in the elimination of SiMe4 and the clean formation of the singular alkylidene-alkylidyne zirconium and hafnium compounds [{M(η5-C5Me5)}3{(μ-CH)3SiMe}(μ3-CSiMe3)] (M = Zr (4), Hf (5)). The reaction of 2 and 3 with NHMe2BH3 (≥1 equiv) at room temperature affords the dialkyl(dimethylamidoborane) complexes [M(η5-C5Me5)(CH2SiMe3)2(NMe2BH3)] (M = Zr (6), Hf (7)). Compounds 6 and 7 are unstable in solution and decompose with formation of the alkyl(dimethylamino)borane [B(CH2SiMe3)H(NMe2)] (8), SiMe4, and other minor byproducts, including the tetranuclear zirconium(III) octahydride complex [{Zr(η5-C5Me5)}4(μ-H)8] (9) in the decomposition of 6. Addition of NHMe2BH3 to the titanium tris(trimethylsilylmethyl) derivative 1 gives the trinuclear mixed valence Ti(II)/Ti(III) tetrahydride complex [{Ti(η5-C5Me5)(μ-H)}3(μ3-H)(μ3-NMe2BH2)] (10) at 45-65 °C. While the complete conversion of 1 under argon atmosphere requires excess NHMe2BH3 (up to 15 equiv), complex 10 is readily prepared with 3 equiv of NHMe2BH3 under a hydrogen atmosphere indicating that the formation of 10 involves hydrogenolysis of 1 in the presence of (NMe2BH2)2. In absence of amine-borane, the reaction of 1 with H2 leads to the tetranuclear titanium(III) octahydride [{Ti(η5-C5Me5)}4(μ-H)8] (11), which upon addition of NHMe2BH3 and subsequent heating at 65 °C affords complex 10. The X-ray crystal structures of 2, 4, 5, 10, and 11 were determined.
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Affiliation(s)
- Maider Greño
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28805 Alcalá de Henares-Madrid, Spain
| | - Estefanía Del Horno
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28805 Alcalá de Henares-Madrid, Spain
| | - Miguel Mena
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28805 Alcalá de Henares-Madrid, Spain
| | - Adrián Pérez-Redondo
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28805 Alcalá de Henares-Madrid, Spain
| | - Víctor Varela-Izquierdo
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28805 Alcalá de Henares-Madrid, Spain
| | - Carlos Yélamos
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28805 Alcalá de Henares-Madrid, Spain
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26
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Less RJ, Hanf S, García-Rodríguez R, Bond AD, Wright DS. A [HN(BH═NH)2]2– Dianion, Isoelectronic with a β-Diketiminate. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00436] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert J. Less
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Schirin Hanf
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, U.K
- University of Leipzig, Department of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany
| | - Raúl García-Rodríguez
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Campus Miguel, Delibes, 47011 Valladolid, Spain
| | - Andrew D. Bond
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Dominic S. Wright
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, U.K
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27
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Todisco S, Luconi L, Giambastiani G, Rossin A, Peruzzini M, Golub IE, Filippov OA, Belkova NV, Shubina ES. Ammonia Borane Dehydrogenation Catalyzed by (κ4-EP3)Co(H) [EP3 = E(CH2CH2PPh2)3; E = N, P] and H2 Evolution from Their Interaction with NH Acids. Inorg Chem 2017; 56:4296-4307. [DOI: 10.1021/acs.inorgchem.6b02673] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefano Todisco
- Istituto di Chimica dei Composti Organometallici−Consiglio Nazionale delle Ricerche (ICCOM - CNR), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
| | - Lapo Luconi
- Istituto di Chimica dei Composti Organometallici−Consiglio Nazionale delle Ricerche (ICCOM - CNR), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
| | - Giuliano Giambastiani
- Istituto di Chimica dei Composti Organometallici−Consiglio Nazionale delle Ricerche (ICCOM - CNR), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
- Kazan Federal University, Kremlyovskaya
Street 18, 420008 Kazan, Russia
| | - Andrea Rossin
- Istituto di Chimica dei Composti Organometallici−Consiglio Nazionale delle Ricerche (ICCOM - CNR), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
| | - Maurizio Peruzzini
- Istituto di Chimica dei Composti Organometallici−Consiglio Nazionale delle Ricerche (ICCOM - CNR), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
| | - Igor E. Golub
- A.N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), Vavilova Street 28, 119991 Moscow, Russia
- People’s Friendship University of Russia (RUDN
University), 6 Miklukho-Maklay St., 117198 Moscow, Russia
| | - Oleg A. Filippov
- A.N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), Vavilova Street 28, 119991 Moscow, Russia
| | - Natalia V. Belkova
- A.N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), Vavilova Street 28, 119991 Moscow, Russia
| | - Elena S. Shubina
- A.N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), Vavilova Street 28, 119991 Moscow, Russia
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28
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Zhang X, Kam L, Trerise R, Williams TJ. Ruthenium-Catalyzed Ammonia Borane Dehydrogenation: Mechanism and Utility. Acc Chem Res 2017; 50:86-95. [PMID: 28032510 DOI: 10.1021/acs.accounts.6b00482] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
One of the greatest challenges in using H2 as a fuel source is finding a safe, efficient, and inexpensive method for its storage. Ammonia borane (AB) is a solid hydrogen storage material that has garnered attention for its high hydrogen weight density (19.6 wt %) and ease of handling and transport. Hydrogen release from ammonia borane is mediated by either hydrolysis, thus giving borate products that are difficult to rereduce, or direct dehydrogenation. Catalytic AB dehydrogenation has thus been a popular topic in recent years, motivated both by applications in hydrogen storage and main group synthetic chemistry. This Account is a complete description of work from our laboratory in ruthenium-catalyzed ammonia borane dehydrogenation over the last 6 years, beginning with the Shvo catalyst and resulting ultimately in the development of optimized, leading catalysts for efficient hydrogen release. We have studied AB dehydrogenation with Shvo's catalyst extensively and generated a detailed understanding of the role that borazine, a dehydrogenation product, plays in the reaction: it is a poison for both Shvo's catalyst and PEM fuel cells. Through independent syntheses of Shvo derivatives, we found a protective mechanism wherein catalyst deactivation by borazine is prevented by coordination of a ligand that might otherwise be a catalytic poison. These studies showed how a bidentate N-N ligand can transform the Shvo into a more reactive species for AB dehydrogenation that minimizes accumulation of borazine. Simultaneously, we designed novel ruthenium catalysts that contain a Lewis acidic boron to replace the Shvo -OH proton, thus offering more flexibility to optimize hydrogen release and take on more general problems in hydride abstraction. Our scorpionate-ligated ruthenium species (12) is a best-of-class catalyst for homogeneous dehydrogenation of ammonia borane in terms of its extent of hydrogen release (4.6 wt %), air tolerance, and reusability. Moreover, a synthetically simplified ruthenium complex supported by the inexpensive bis(pyrazolyl)borate ligand is a comparably good catalyst for AB dehydrogenation, among other reactions. In this Account, we present a detailed, concise description of how our work with the Shvo system progressed to the development of our very reactive and flexible dual-site boron-ruthenium catalysts.
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Affiliation(s)
- Xingyue Zhang
- Loker Hydrocarbon Research
Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Lisa Kam
- Loker Hydrocarbon Research
Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Ryan Trerise
- Loker Hydrocarbon Research
Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Travis J. Williams
- Loker Hydrocarbon Research
Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
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29
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Marquardt C, Kahoun T, Stauber A, Balázs G, Bodensteiner M, Timoshkin AY, Scheer M. Anionische Ketten der Stammverbindungen der Pnictogenylborane. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608875] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christian Marquardt
- Universität Regensburg; Institut für Anorganische Chemie; 93040 Regensburg Deutschland
| | - Tobias Kahoun
- Universität Regensburg; Institut für Anorganische Chemie; 93040 Regensburg Deutschland
| | - Andreas Stauber
- Universität Regensburg; Institut für Anorganische Chemie; 93040 Regensburg Deutschland
| | - Gábor Balázs
- Universität Regensburg; Institut für Anorganische Chemie; 93040 Regensburg Deutschland
| | - Michael Bodensteiner
- Universität Regensburg; Institut für Anorganische Chemie; 93040 Regensburg Deutschland
| | - Alexey Y. Timoshkin
- Institute of Chemistry; St. Petersburg State University; Universitetskaya nab. 7/9 199034 St. Petersburg Russland
| | - Manfred Scheer
- Universität Regensburg; Institut für Anorganische Chemie; 93040 Regensburg Deutschland
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30
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Marquardt C, Kahoun T, Stauber A, Balázs G, Bodensteiner M, Timoshkin AY, Scheer M. Anionic Chains of Parent Pnictogenylboranes. Angew Chem Int Ed Engl 2016; 55:14828-14832. [DOI: 10.1002/anie.201608875] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Christian Marquardt
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Germany
| | - Tobias Kahoun
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Germany
| | - Andreas Stauber
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Germany
| | - Gábor Balázs
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Germany
| | - Michael Bodensteiner
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Germany
| | - Alexey Y. Timoshkin
- Institute of Chemistry St. Petersburg State University Universitetskaya nab. 7/9 199034 St. Petersburg Russia
| | - Manfred Scheer
- Universität Regensburg Institut für Anorganische Chemie 93040 Regensburg Germany
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31
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Bhunya S, Malakar T, Ganguly G, Paul A. Combining Protons and Hydrides by Homogeneous Catalysis for Controlling the Release of Hydrogen from Ammonia–Borane: Present Status and Challenges. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01704] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sourav Bhunya
- Raman Centre for Atomic,
Molecular and
Optical Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - Tanmay Malakar
- Raman Centre for Atomic,
Molecular and
Optical Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - Gaurab Ganguly
- Raman Centre for Atomic,
Molecular and
Optical Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - Ankan Paul
- Raman Centre for Atomic,
Molecular and
Optical Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India
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32
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Maier AFG, Tussing S, Schneider T, Flörke U, Qu ZW, Grimme S, Paradies J. Dehydrierende Oxidation von Indolinen und anderen Heterocyclen durch frustrierte Lewis-Paare. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606426] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander F. G. Maier
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Sebastian Tussing
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Tobias Schneider
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Ulrich Flörke
- Institut für Anorganische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry; Institut für Physikalische und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry; Institut für Physikalische und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Jan Paradies
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
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33
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Maier AFG, Tussing S, Schneider T, Flörke U, Qu ZW, Grimme S, Paradies J. Frustrated Lewis Pair Catalyzed Dehydrogenative Oxidation of Indolines and Other Heterocycles. Angew Chem Int Ed Engl 2016; 55:12219-23. [PMID: 27594431 DOI: 10.1002/anie.201606426] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 08/02/2016] [Indexed: 11/11/2022]
Abstract
An acceptorless dehydrogenation of heterocycles catalyzed by frustrated Lewis pairs (FLPs) was developed. Oxidation with concomitant liberation of molecular hydrogen proceeded in high to excellent yields for N-protected indolines as well as four other substrate classes. The mechanism of this unprecedented FLP-catalyzed reaction was investigated by mechanistic studies, characterization of reaction intermediates by NMR spectroscopy and X-ray crystal analysis, and by quantum-mechanical calculations. Hydrogen liberation from the ammonium hydridoborate intermediate is the rate-determining step of the oxidation. The addition of a weaker Lewis acid as a hydride shuttle increased the reaction rate by a factor of 2.28 through a second catalytic cycle.
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Affiliation(s)
- Alexander F G Maier
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Sebastian Tussing
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Tobias Schneider
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Ulrich Flörke
- Institute of Inorganic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany.
| | - Jan Paradies
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany.
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34
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Schweighauser L, Wegner HA. Bis-Boron Compounds in Catalysis: Bidentate and Bifunctional Activation. Chemistry 2016; 22:14094-103. [PMID: 27490466 DOI: 10.1002/chem.201602231] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Indexed: 11/11/2022]
Abstract
The development of metal-free catalysts as an alternative to the use of transition metals has gained tremendous interest in the past. In catalysis, Lewis acidity is one of the major principles used for the activation of organic compounds. Improving the reactivity and selectivity of Lewis acids by utilizing bidentate interactions was already proposed 50 years ago. Nevertheless, product inhibition due to strong binding has made applications of bidentate Lewis acids challenging for many years. Recently, bis-boron compounds have been found to be very effective and several applications in Diels-Alder reactions, carbon dioxide reduction, and ammonia-borane dehydrogenation were reported. All three transformations are enabled by the catalyst at different stages during the course of the reaction. These new and useful examples illustrate the great potential of the concept.
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Affiliation(s)
- Luca Schweighauser
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Hermann A Wegner
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany.
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35
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Investigation of ligand steric effect on the hydrogen gas produced via a nickel-catalyzed dehydrogenation of ammonia-borane utilizing unsymmetrical triazolylidene ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.02.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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36
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Kumar A, Beattie NA, Pike SD, Macgregor SA, Weller AS. The Simplest Amino-borane H2 B=NH2 Trapped on a Rhodium Dimer: Pre-Catalysts for Amine-Borane Dehydropolymerization. Angew Chem Int Ed Engl 2016; 55:6651-6. [PMID: 27100775 PMCID: PMC5074255 DOI: 10.1002/anie.201600898] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/22/2016] [Indexed: 11/17/2022]
Abstract
The μ-amino-borane complexes [Rh2 (L(R) )2 (μ-H)(μ-H2 B=NHR')][BAr(F) 4 ] (L(R) =R2 P(CH2 )3 PR2 ; R=Ph, (i) Pr; R'=H, Me) form by addition of H3 B⋅NMeR'H2 to [Rh(L(R) )(η(6) -C6 H5 F)][BAr(F) 4 ]. DFT calculations demonstrate that the amino-borane interacts with the Rh centers through strong Rh-H and Rh-B interactions. Mechanistic investigations show that these dimers can form by a boronium-mediated route, and are pre-catalysts for amine-borane dehydropolymerization, suggesting a possible role for bimetallic motifs in catalysis.
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Affiliation(s)
- Amit Kumar
- Department of Chemistry, Chemistry Research Laboratories, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Nicholas A Beattie
- Institute of Chemical Sciences, Heriot Watt University, Edinburgh, EH14 4AS, UK
| | - Sebastian D Pike
- Department of Chemistry, Chemistry Research Laboratories, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot Watt University, Edinburgh, EH14 4AS, UK.
| | - Andrew S Weller
- Department of Chemistry, Chemistry Research Laboratories, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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37
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Zhang X, Kam L, Williams TJ. Dehydrogenation of ammonia borane through the third equivalent of hydrogen. Dalton Trans 2016; 45:7672-7. [PMID: 27052687 DOI: 10.1039/c6dt00604c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ammonia borane (AB) has high hydrogen density (19.6 wt%), and can, in principle, release up to 3 equivalents of H2 under mild catalytic conditions. A limited number of catalysts are capable of non-hydrolytic dehydrogenation of AB beyond 2 equivalents of H2 under mild conditions, but none of these is shown directly to derivatise borazine, the product formed after 2 equivalents of H2 are released. We present here a high productivity ruthenium-based catalyst for non-hydrolytic AB dehydrogenation that is capable of borazine dehydrogenation, and thus exhibits among the highest H2 productivity reported to date for anhydrous AB dehydrogenation. At 1 mol% loading, (phen)Ru(OAc)2(CO)2 () effects AB dehydrogenation through 2.7 equivalents of H2 at 70 °C, is robust through multiple charges of AB, and is water and air stable. We further demonstrate that catalyst has the ability both to dehydrogenate borazine in isolation and dehydrogenate AB itself. This is important, both because borazine derivatisation is productivity-limiting in AB dehydrogenation and because borazine is a fuel cell poison that is commonly released in H2 production from this medium.
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Affiliation(s)
- Xingyue Zhang
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, USA.
| | - Lisa Kam
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, USA.
| | - Travis J Williams
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, USA.
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38
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Kumar A, Beattie NA, Pike SD, Macgregor SA, Weller AS. The Simplest Amino-borane H2B=NH2Trapped on a Rhodium Dimer: Pre-Catalysts for Amine-Borane Dehydropolymerization. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600898] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Amit Kumar
- Department of Chemistry, Chemistry Research Laboratories; University of Oxford; Mansfield Road Oxford OX1 3TA UK
| | - Nicholas A. Beattie
- Institute of Chemical Sciences; Heriot Watt University; Edinburgh EH14 4AS UK
| | - Sebastian D. Pike
- Department of Chemistry, Chemistry Research Laboratories; University of Oxford; Mansfield Road Oxford OX1 3TA UK
| | - Stuart A. Macgregor
- Institute of Chemical Sciences; Heriot Watt University; Edinburgh EH14 4AS UK
| | - Andrew S. Weller
- Department of Chemistry, Chemistry Research Laboratories; University of Oxford; Mansfield Road Oxford OX1 3TA UK
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39
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Rossin A, Peruzzini M. Ammonia–Borane and Amine–Borane Dehydrogenation Mediated by Complex Metal Hydrides. Chem Rev 2016; 116:8848-72. [DOI: 10.1021/acs.chemrev.6b00043] [Citation(s) in RCA: 305] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrea Rossin
- Institute of Chemistry of
Organometallic Compounds, ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (Florence), Italy
| | - Maurizio Peruzzini
- Institute of Chemistry of
Organometallic Compounds, ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (Florence), Italy
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40
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Li MW, Pendleton IM, Nett AJ, Zimmerman PM. Mechanism for Forming B,C,N,O Rings from NH3BH3 and CO2 via Reaction Discovery Computations. J Phys Chem A 2016; 120:1135-44. [DOI: 10.1021/acs.jpca.5b11156] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Maxwell W. Li
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ian M. Pendleton
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alex J. Nett
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Paul M. Zimmerman
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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41
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Metal-Free Dehydrogenation of Amine-Boranes by Tunable N-Heterocyclic Iminoboranes. Chemistry 2016; 22:2134-2145. [DOI: 10.1002/chem.201503528] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Indexed: 01/11/2023]
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42
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Kumar A, Ishibashi JSA, Hooper TN, Mikulas TC, Dixon DA, Liu SY, Weller AS. The Synthesis, Characterization and Dehydrogenation of Sigma-Complexes of BN-Cyclohexanes. Chemistry 2016; 22:310-22. [PMID: 26602704 PMCID: PMC4818983 DOI: 10.1002/chem.201502986] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Indexed: 11/11/2022]
Abstract
The coordination chemistry of the 1,2-BN-cyclohexanes 2,2-R2 -1,2-B,N-C4 H10 (R2 =HH, MeH, Me2 ) with Ir and Rh metal fragments has been studied. This led to the solution (NMR spectroscopy) and solid-state (X-ray diffraction) characterization of [Ir(PCy3 )2 (H)2 (η(2) η(2) -H2 BNR2 C4 H8 )][BAr(F) 4 ] (NR2 =NH2 , NMeH) and [Rh(iPr2 PCH2 CH2 CH2 PiPr2 )(η(2) η(2) -H2 BNR2 C4 H8 )][BAr(F) 4 ] (NR2 =NH2 , NMeH, NMe2 ). For NR2 =NH2 subsequent metal-promoted, dehydrocoupling shows the eventual formation of the cyclic tricyclic borazine [BNC4 H8 ]3 , via amino-borane and, tentatively characterized using DFT/GIAO chemical shift calculations, cycloborazane intermediates. For NR2 =NMeH the final product is the cyclic amino-borane HBNMeC4 H8 . The mechanism of dehydrogenation of 2,2-H,Me-1,2-B,N-C4 H10 using the {Rh(iPr2 PCH2 CH2 CH2 PiPr2 )}(+) catalyst has been probed. Catalytic experiments indicate the rapid formation of a dimeric species, [Rh2 (iPr2 PCH2 CH2 CH2 PiPr2 )2 H5 ][BAr(F) 4 ]. Using the initial rate method starting from this dimer, a first-order relationship to [amine-borane], but half-order to [Rh] is established, which is suggested to be due to a rapid dimer-monomer equilibrium operating.
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Affiliation(s)
- Amit Kumar
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Jacob S A Ishibashi
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts, 02467-3860 (USA)
| | - Thomas N Hooper
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Tanya C Mikulas
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336 (USA)
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336 (USA)
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts, 02467-3860 (USA).
| | - Andrew S Weller
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA (UK).
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43
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Glüer A, Förster M, Celinski VR, Schmedt auf der Günne J, Holthausen MC, Schneider S. Highly Active Iron Catalyst for Ammonia Borane Dehydrocoupling at Room Temperature. ACS Catal 2015. [DOI: 10.1021/acscatal.5b02406] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arne Glüer
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
| | - Moritz Förster
- Insitut
für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Strasse 7, 60438 Frankfurt am Main, Germany
| | - Vinicius R. Celinski
- Inorganic
Materials Chemistry, University of Siegen, Adolf-Reichwein-Straße 2, D-57068 Siegen, Germany
| | | | - Max C. Holthausen
- Insitut
für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Strasse 7, 60438 Frankfurt am Main, Germany
| | - Sven Schneider
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
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44
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Lu Z, Schweighauser L, Hausmann H, Wegner HA. Metal‐Free Ammonia–Borane Dehydrogenation Catalyzed by a Bis(borane) Lewis Acid. Angew Chem Int Ed Engl 2015; 54:15556-9. [DOI: 10.1002/anie.201508360] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Zhenpin Lu
- Institut für Organische Chemie, Justus‐Liebig‐Universität Giessen, Heinrich‐Buff‐Ring 17, 35392 Gießen (Germany)
| | - Luca Schweighauser
- Institut für Organische Chemie, Justus‐Liebig‐Universität Giessen, Heinrich‐Buff‐Ring 17, 35392 Gießen (Germany)
| | - Heike Hausmann
- Institut für Organische Chemie, Justus‐Liebig‐Universität Giessen, Heinrich‐Buff‐Ring 17, 35392 Gießen (Germany)
| | - Hermann A. Wegner
- Institut für Organische Chemie, Justus‐Liebig‐Universität Giessen, Heinrich‐Buff‐Ring 17, 35392 Gießen (Germany)
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45
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Lu Z, Schweighauser L, Hausmann H, Wegner HA. Metallfreie Amminboran-Dehydrierung katalysiert durch eine Dibor-Lewis-Säure. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508360] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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46
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Erickson KA, Stelmach JPW, Mucha NT, Waterman R. Zirconium-Catalyzed Amine Borane Dehydrocoupling and Transfer Hydrogenation. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00415] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karla A. Erickson
- Department of Chemistry, University of Vermont, Burlington, Vermont 05401, United States
| | - John P. W. Stelmach
- Department of Chemistry, University of Vermont, Burlington, Vermont 05401, United States
| | - Neil T. Mucha
- Department of Chemistry, University of Vermont, Burlington, Vermont 05401, United States
| | - Rory Waterman
- Department of Chemistry, University of Vermont, Burlington, Vermont 05401, United States
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47
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Zhang X, Lu Z, Foellmer LK, Williams TJ. Nitrogen-Based Ligands Accelerate Ammonia Borane Dehydrogenation with the Shvo Catalyst. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00409] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xingyue Zhang
- Loker Hydrocarbon Research
Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Zhiyao Lu
- Loker Hydrocarbon Research
Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Lena K. Foellmer
- Loker Hydrocarbon Research
Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Travis J. Williams
- Loker Hydrocarbon Research
Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
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48
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