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Delgado Gómez M, Marazzi M, Elguero J, Ferrer M, Alkorta I. Production of Dihydrogen Using Ammonia Borane as Reagent and Pyrazole as Catalyst. Chemphyschem 2023; 24:e202300214. [PMID: 37350535 DOI: 10.1002/cphc.202300214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/14/2023] [Accepted: 06/23/2023] [Indexed: 06/24/2023]
Abstract
Theoretical chemistry (DLPNO-CCSD(T)/def2-TZVP//M06-2x/aug-cc-pVDZ) was used to design a system based on ammonia boranes catalyzed by pyrazoles with the aim of producing dihydrogen, nowadays of high interest as clean fuel. The reactivity of ammonia borane and cyclotriborazane were investigated, including catalytic activation through 1H-pyrazole, 4-methoxy-1H-pyrazole, and 4-nitro-1H-pyrazole. The results point toward a catalytic cycle by which, at the same time, ammonia borane can initially store and then, through catalysis, produce dihydrogen and amino borane. Subsequently, amino borane can trimerize to form cyclotriborazane that, in presence of the same catalyst, can also produce dihydrogen. This study proposes therefore a consistent progress in using environmentally sustainable (metal free) catalysts to efficiently extract dihydrogen from small B-N bonded molecules.
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Affiliation(s)
- Marta Delgado Gómez
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares, Madrid, Spain
| | - Marco Marazzi
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares, Madrid, Spain
- Universidad de Alcalá, Instituto de Investigación Química "Andrés M. del Río" (IQAR), 28871 Alcalá de Henares, Madrid, Spain
| | - José Elguero
- Instituto de Química Médica CSIC, Juan de la Cierva, 3, 28006, Madrid, Spain
| | - Maxime Ferrer
- Instituto de Química Médica CSIC, Juan de la Cierva, 3, 28006, Madrid, Spain
- PhD Program in Theoretical Chemistry and Computational Modeling, Doctoral School, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Ibon Alkorta
- Instituto de Química Médica CSIC, Juan de la Cierva, 3, 28006, Madrid, Spain
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Emayavaramban B, Chakraborty P, Dahiya P, Sundararaju B. Iron-Catalyzed α-Methylation of Ketones Using Methanol as the C1 Source under Photoirradiation. Org Lett 2022; 24:6219-6223. [PMID: 35960264 DOI: 10.1021/acs.orglett.2c02545] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mild, environmentally benign approach for α-methylation of ketones utilizing methanol as the C1 source under visible light has been developed. The reaction conditions were favorable for a wide range of ketones with both aromatic and aliphatic backbones, allowing for good-to-excellent yields of the respective products. The tentative mechanism is postulated after preliminary mechanistic and kinetic experiments.
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Affiliation(s)
| | - Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Pardeep Dahiya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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Sultana M, Bhattacharjee I, Bhunya S, Paul A. Uncovering the Synchronous Role of Bis‐borane with Nucleophilic Solvent as Frustrated Lewis pair in Metal‐free Catalytic Dehydrogenation of Ammonia‐borane. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Munia Sultana
- Indian Association for the Cultivation of Science School of Chemical Sciences INDIA
| | - Ishita Bhattacharjee
- Indian Association for the Cultivation of Science School of Chemical Sciences INDIA
| | - Sourav Bhunya
- Indian Association for the Cultivation of Science School of Chemical Sciences INDIA
| | - Ankan Paul
- Indian Association for the Cultivation of Science Raman Centre for Atomic, Molecular and Optical Sciences 2A and 2B, Raja S. C. Mullick RoadJadavpur 700032 Kolkata INDIA
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