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Metal-Free Reduction of CO2 to Methoxyborane under Ambient Conditions through Borondiformate Formation

Research paper by Dr. Samaresh Chandra Sau, Rameswar Bhattacharjee, Pavan K. Vardhanapu, Gonela Vijaykumar, Prof. Dr. Ayan Datta, Prof. Dr. Swadhin K. Mandal

Indexed on: 09 Nov '16Published on: 07 Nov '16Published in: Angewandte Chemie International Edition



Abstract

An abnormal N-heterocyclic carbene (aNHC) based homogeneous catalyst has been used for the reduction of carbon dioxide to methoxyborane in the presence of a range of hydroboranes under ambient conditions and resulted in the highest turnover number of 6000. A catalytically active reaction intermediate, [aNHC-H⋅9BBN(OCOH)2] was structurally characterized and authenticated by NMR spectroscopy. A detailed mechanistic cycle of this catalytic process via borondiformate formation has been proposed from tandem experimental and computational experiments.