Issue 14, 2016

Iron amino-bis(phenolate) complexes for the formation of organic carbonates from CO2 and oxiranes

Abstract

A series of iron(III) compounds supported by tetradentate amino-bis(phenolate) ligands were synthesized and characterized using electronic absorption spectroscopy, magnetic moment measurement and MALDI-TOF mass spectrometry. The solid-state structures of 1 and 2 were determined by X-ray diffraction and reveal iron(III) square pyramidal compounds. The complexes were studied as catalysts for the reaction of carbon dioxide and epoxides in the presence of a co-catalyst, under solvent free conditions to yield cyclic carbonates. Catalytic testing with TBAB as a co-catalyst shows that 4 bearing electron withdrawing groups in the ortho and para-positions of the phenolate ring exhibits the highest catalytic activity. Kinetic studies using 1 revealed that the cycloaddition reaction is affected by temperature as expected and the activation energy for propylene carbonate formation is 98.4 kJ mol−1.

Graphical abstract: Iron amino-bis(phenolate) complexes for the formation of organic carbonates from CO2 and oxiranes

Supplementary files

Article information

Article type
Paper
Submitted
02 Mar 2016
Accepted
24 Mar 2016
First published
29 Mar 2016
This article is Open Access
Creative Commons BY license

Catal. Sci. Technol., 2016,6, 5364-5373

Author version available

Iron amino-bis(phenolate) complexes for the formation of organic carbonates from CO2 and oxiranes

D. Alhashmialameer, J. Collins, K. Hattenhauer and F. M. Kerton, Catal. Sci. Technol., 2016, 6, 5364 DOI: 10.1039/C6CY00477F

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