Selective reduction and homologation of carbon monoxide by organometallic iron complexes

0301 basic medicine 0303 health sciences 03 medical and health sciences Science Q General Physics and Astronomy General Chemistry 01 natural sciences General Biochemistry, Genetics and Molecular Biology Article 0104 chemical sciences
DOI: 10.1038/s41467-018-06242-w Publication Date: 2018-09-10T10:07:37Z
ABSTRACT
AbstractCarbon monoxide is a key C1 feedstock for the industrial production of hydrocarbons, where it is used to make millions of tonnes of chemicals, fuels, and solvents per annum. Many transition metal complexes can coordinate CO, but the formation of new C−C bonds in well-defined compounds from the scission and subsequent coupling of two or more CO moieties at a transition metal centre remains a challenge. Herein, we report the use of low-coordinate iron(II) complexes for the selective scission and homologation of CO affording unusual squaraines and iron carboxylates at ambient temperature and pressure. A modification of the ligand framework allows for the isolation and structural characterisation of a proposed metallacyclic Fe(II) carbene intermediate. These results indicate that, with the appropriate choice of supporting ligands, it is possible to cleave and homologate carbon monoxide under mild conditions using an abundant and environmentally benign low-coordinate, first row transition metal.
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