Abstract
Cu(I)L complexes catalyze the Ullmann reaction2-BrC6H4CO2− + H2O → 2-HOC6H4CO2− + Br− + H+however the process is slow and undesirable yields of benzoic acid and diphenoic acid are formed. The optimal ligand, L, for this catalyst should enhance the rate of the process, probably via shifting the redox potential of the Cu(II/I) couple cathodically, inhibit the formation of the diphenoic acid, probably via steric hindrance, and of benzoic acid probably via buffering the solution at pH > 7. The results demonstrate that Cu(I)(2,5,8,11-tetramethyl-2,5,8,11-tetraazadodecane)+, i.e. Cu(I) with a ligand which fulfils these requirements, is a very good catalyst for this process with a selectivity of >97% and high turnover numbers.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
