- Homogeneous Electrochemical Reduction of CO2 to CO by a Cobalt Pyridine Thiolate Complex
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The chemical and electrochemical reduction of CO2 to value added chemicals entails the development of efficient and selective catalysts. Synthesis, characterization and electrochemical CO2 reduction activity of a air-stable cobalt(III) diphenylphosphenethano-bis(2-pyridinethiolate)chloride [{Co(dppe)(2-PyS)2}Cl, 1-Cl] complex is divulged. The complex reduces CO2 under homogeneous electrocatalytic conditions to produce CO with high Faradaic efficiency (FE > 92%) and selectivity in the presence of water. Through detailed electrochemical investigations, product analysis, and mechanistic investigations supported by theoretical calculations, it is established that complex 1-Cl reduces CO2 in its Co(I) state. A reductive cleavage leads to a dangling protonated pyridine arm which enables facile CO2 binding through a H-bond donation and facilitates the C-O bond cleavage via a directed protonation. A systematic benchmarking of this catalyst indicates that it has a modest overpotential (~180 mV) and a TOF of ~20 s-1 for selective reduction of CO2 to CO with H2O as a proton source.
- Ahmed, Md Estak,Dey, Abhishek,Dey, Subal,Rana, Atanu,Saha, Rajat
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supporting information
p. 5292 - 5302
(2020/04/20)
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- Catalytic Enantioselective Hetero-dimerization of Acrylates and 1,3-Dienes
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1,3-Dienes are ubiquitous and easily synthesized starting materials for organic synthesis, and alkyl acrylates are among the most abundant and cheapest feedstock carbon sources. A practical, highly enantioselective union of these two readily available pre
- Jing, Stanley M.,Balasanthiran, Vagulejan,Pagar, Vinayak,Gallucci, Judith C.,RajanBabu
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supporting information
p. 18034 - 18043
(2017/12/26)
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- Cobalt-catalysed asymmetric hydrovinylation of 1,3-dienes
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In the presence of bidentate 1,n-bis-diphenylphosphinoalkane-CoCl2 complexes {Cl2Co[P ~ P]} and Me3Al or methylaluminoxane, acyclic (E)-1,3-dienes react with ethylene (1 atmosphere) to give excellent yields of hydrovinylat
- Timsina, Yam N.,Sharma, Rakesh K.,Rajanbabu
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p. 3994 - 4008
(2015/06/25)
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