Synthesis and structure of palladium(II) complexes supported by bis-NHC pincer ligands for the electrochemical activation of CO₂.

ABSTRACT: A series of bis-NHC pincer complexes of palladium(II) have been prepared and characterized. These pyridyl-spaced dicarbene complexes ([(PDC^R)Pd(MeCN)](PF₆)₂ ) were synthesized with substituents of varying steric bulk at the wingtip positions, which include R = methyl, ethyl, isopropyl, cyclohexyl, mesityl and 2,6-diisopropylphenyl. The synthesis of this library of complexes was accomplished either by direct metallation of the prerequisite pyridyl-spaced bis-imidazolium proligands with Pd(OAc)₂ or via treatment with Ag₂O to afford the corresponding silver carbenes, which were then transmetallated onto palladium. Solid-state structures for each of the [(PDC^R)Pd(MeCN)](PF₆)₂ der

SUBMITTER: Andrade GA 

PROVIDER: S-EPMC6457682 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature