ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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

Harish Chandra Pradhan, Somanath Mantri, Tungabidya Maharana, and Alekha Kumar Sutar

Department of Chemistry, National Institute of Technology, Raipur, India

E-mail: mtungabidya@gmail.com

Received: 25 October 2019  Accepted: 24 April 2020

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.

Keywords: CO2; Epoxide; Cobalt complex; Cyclic carbonate; Co-catalyst

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01175-5

Chemical Papers 74 (10) 3423–3430 (2020)