Impact of Green Cosolvents on the Catalytic Dehydrogenation of Formic Acid: The Case of Iridium Catalysts Bearing NHC-phosphane Ligands.

ABSTRACT: The catalysts [Ir(COD)(κ³-P,C,P'-PC^NHCP)]BF₄ and [Ir(COD)(κ²-P,C-PC^NHCO)]BF₄ proved to be active in the solventless dehydrogenation of formic acid. The impact of various cosolvents on the activity was evaluated, showing an outstanding improvement of the catalytic performance of [Ir(COD)(κ²-P,C-PC^NHCO)]BF₄] in "green" organic carbonates: namely, dimethyl carbonate (DMC) and propylene carbonate (PC). The TOF_1h value for [Ir(COD)(κ²-P,C-PC^NHCO)]BF₄ increases from 61 to 988 h^-1 upon changing from solventless conditions to a 1/1 (v/v) DMC/HCOOH mixture. However, in the case of [Ir(COD)(PC^NHC

SUBMITTER: Luque-Gomez A 

PROVIDER: S-EPMC8527458 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature