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Cochrane AR, Kerr WJ, Paterson LC, Pearson CM, Shaw P. Advances in the cobalt-catalysed Pauson-Khand reaction: Development of a sulfide-promoted, microwave-assisted protocol. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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2
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Manton JC, Cerpentier FJR, Harvey EC, Clark IP, Greetham GM, Long C, Pryce MT. Photochemical or electrochemical bond breaking – exploring the chemistry of (μ 2-alkyne)Co 2(CO) 6 complexes using time-resolved infrared spectroscopy, spectro-electrochemical and density functional methods. Dalton Trans 2019; 48:14642-14652. [DOI: 10.1039/c9dt03006a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoassisted Pauson–Khand reaction involves the formation of a high-spin diradical species and not CO loss as previously thought.
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Affiliation(s)
| | | | - Emma C. Harvey
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Ian P. Clark
- Central Laser Facility
- Science & Technology Facilities Council
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
| | - Gregory M. Greetham
- Central Laser Facility
- Science & Technology Facilities Council
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
| | - Conor Long
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Mary T. Pryce
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
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3
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Hollingsworth RL, Beattie JW, Grass A, Martin PD, Groysman S, Lord RL. Reactions of dicobalt octacarbonyl with dinucleating and mononucleating bis(imino)pyridine ligands. Dalton Trans 2018; 47:15353-15363. [PMID: 30280749 DOI: 10.1039/c8dt03405b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work focuses on the application of dicobalt octacarbonyl (Co2(CO)8) as a metal precursor in the chemistry of formally low-valent cobalt with redox-active bis(imino)pyridine [NNN] ligands. The reactions of both mononucleating mesityl-substituted bis(aldimino)pyridine (L1) and dinucleating macrocyclic xanthene-bridged di(bis(aldimino)pyridine) (L2) with Co2(CO)8 were investigated. Independent of the metal-to-ligand ratio (1 : 1 or 1 : 2 ligand to Co2(CO)8), the reaction of the dinucleating ligand L2 with Co2(CO)8 produces a tetranuclear complex [Co4(L2)(CO)10] featuring two discrete [Co2[NNN](CO)5] units. In contrast, a related mononucleating bis(aldimino)pyridine ligand, L1, produces different species at different ligand to Co2(CO)8 ratios, including dinuclear [Co2(CO)5(L1)] and zwitterionic [Co(L1)2][Co(CO)4]. Interestingly, [Co4(L2)(CO)10] features metal-metal bonds, and no bridging carbonyls, whereas [Co2(CO)5(L1)] contains cobalt centers bridged by one or two carbonyl ligands. In either case, treatment with excess acetonitrile leads to disproportionation to the zwitterionic [Co[NNN](NCMe)2][Co(CO)4] units. The electronic structures of the complexes described above were studied with density functional theory. All the obtained bis(imino)pyridine complexes serve as catalysts for cyclotrimerization of methyl propiolate, albeit their reactivity is inferior compared with Co2(CO)8.
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Affiliation(s)
- Ryan L Hollingsworth
- Department of Chemistry, Wayne State University, 5101 Cass Ave, Detroit, MI 48202, USA.
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Lehrich SW, Hildebrandt A, Korb M, Lang H. From diferrocenyl-cyclopropenone to diferrocenyl-cyclopropenylium cations and triferrocenylpropenones: An electrochemical study. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cambié D, Bottecchia C, Straathof NJW, Hessel V, Noël T. Applications of Continuous-Flow Photochemistry in Organic Synthesis, Material Science, and Water Treatment. Chem Rev 2016; 116:10276-341. [PMID: 26935706 DOI: 10.1021/acs.chemrev.5b00707] [Citation(s) in RCA: 881] [Impact Index Per Article: 110.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Continuous-flow photochemistry in microreactors receives a lot of attention from researchers in academia and industry as this technology provides reduced reaction times, higher selectivities, straightforward scalability, and the possibility to safely use hazardous intermediates and gaseous reactants. In this review, an up-to-date overview is given of photochemical transformations in continuous-flow reactors, including applications in organic synthesis, material science, and water treatment. In addition, the advantages of continuous-flow photochemistry are pointed out and a thorough comparison with batch processing is presented.
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Affiliation(s)
- Dario Cambié
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Cecilia Bottecchia
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Natan J W Straathof
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Volker Hessel
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands.,Department of Organic Chemistry, Ghent University , Krijgslaan 281 (S4), 9000 Ghent, Belgium
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Georgi C, Hildebrandt A, Tuchscherer A, Oswald S, Lang H. Hexacarbonyl (Trimethylsilyl Ethyne) Dicobalt as MOCVD Precursor for Thin Cobalt Layer Formation. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300292] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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7
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Asano K, Uesugi Y, Yoshida JI. Pauson–Khand Reactions in a Photochemical Flow Microreactor. Org Lett 2013; 15:2398-401. [DOI: 10.1021/ol4008519] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keisuke Asano
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuki Uesugi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Jun-ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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Moulton BE, Whitwood AC, Duhme-Klair AK, Lynam JM, Fairlamb IJS. Regiochemistry in Cobalt-Mediated Intermolecular Pauson–Khand Reactions of Unsymmetrical Internal Heteroaromatic Alkynes with Norbornene. J Org Chem 2011; 76:5320-34. [DOI: 10.1021/jo200664m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Benjamin E. Moulton
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Adrian C. Whitwood
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Anne K. Duhme-Klair
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Jason M. Lynam
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Ian J. S. Fairlamb
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
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Ji Y, Riera A, Verdaguer X. Saline Intermolecular Pauson-Khand Reactions of Propargyl Amine. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001617] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Boyle NM, Coleman AC, Long C, Ronayne KL, Browne WR, Feringa BL, Pryce MT. Evidence for Cobalt−Cobalt Bond Homolysis and Wavelength-Dependent CO Loss in (μ2-Alkyne)Co2(CO)6 Complexes. Inorg Chem 2010; 49:10214-6. [DOI: 10.1021/ic101321u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicola M. Boyle
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | | | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Kate L. Ronayne
- Lasers for Science Facility, The Rutherford Appelton Laboratories, Didcot, Oxfordshire, U.K
| | - Wesley R. Browne
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ben L. Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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