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CO 2 Complexation and Activation by a Trost‐Bis(ProPhenol)Cobalt Complex
Author(s) -
Netto Caterina G. C. M.,
Toma Henrique E.
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201301158
Subject(s) - chemistry , cobalt , electrocatalyst , electrochemistry , catalysis , ligand (biochemistry) , formaldehyde , inorganic chemistry , redox , photochemistry , electrode , organic chemistry , biochemistry , receptor
A binuclear cobalt complex, [Co 2 BPP], derived from the ( R , R )‐Trost‐bis‐ProPhenol (BPP) ligand, has been investigated as a catalyst for CO 2 uptake and its electrochemical reduction. The complex exhibits labile acetate ligands that can be readily exchanged with CO 2 , leading to pronounced changes in its vibrational spectra, with ν C=O peaks observed at 1700 and 1596 cm –1 . The electrochemical reduction of the Co III centers at –0.5 V was significantly enhanced in the presence of CO 2 , evidencing a chemical reaction coupled to an electrode process. Instead of yielding CO or HCOOH as observed in most artificial systems, formaldehyde was identified as the major product below –1.0 V, showing that CO 2 can undergo four‐electron reduction by the [Co 2 BPP] electrocatalyst.