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Cobalt(II) complex-catalyzed solventless coupling of CO2 and epoxides

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Abstract

Present manuscript deals with the comprehensive solventless coupling of carbon dioxide and epoxides to yield cyclic carbonates catalyzed by cobalt complex [Co-HPEED]. Different spectroscopic techniques are used to characterize this cobalt complex, which confirm its square planar geometry. The cobalt complex shows high catalytic activity toward the formation of cyclic carbonates. We found that the types of co-catalysts, temperature and time affect the rate of formation of cyclic carbonates to great extent. Finally, a mechanism appropriate for the formation of cyclic carbonates has been given based on our experimental results.

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Acknowledgements

The authors are thankful to Gangadhar Meher University, Ravenshaw University and National Institute of Technology, Raipur, for providing research facilities.

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This work was supported by DST, New Delhi, India.

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Correspondence to Tungabidya Maharana or Alekha Kumar Sutar.

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11696_2020_1175_MOESM1_ESM.doc

This includes electronic spectra of Schiff base and Co-HPEED Complex, FTIR spectra of HPEED Schiff base and Co-HPEED complex, 1H and 13C NMR of HPEED Schiff base, 1H NMR spectrum of an aliquot of the reaction mixture, conversion of epoxides and CO2 into cyclic carbonates, effects of time (min) on yield (%) of cyclic carbonate, kinetics of formation of cyclic styrene carbonate. (DOC 29775 kb)

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Pradhan, H.C., Mantri, S., Maharana, T. et al. Cobalt(II) complex-catalyzed solventless coupling of CO2 and epoxides. Chem. Pap. 74, 3423–3430 (2020). https://doi.org/10.1007/s11696-020-01175-5

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  • DOI: https://doi.org/10.1007/s11696-020-01175-5

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