New air-stable chelating diphosphine ligands, 1,8-bis(4-(diphenylphosphino)phenyl)anthracene (2) and 1,8-bis(4-(diphenylphosphino)-3,5-dimethylphenyl)anthracene (3), were synthesized from readily available starting materials. The examination of their coordination modes in Pd(II) and Rh(I) complexes by means of 1 H, 13 C, and 31 P NMR spectroscopy and X-ray analysis revealed that 2 is mainly a trans-coordinating ligand but can also adapt smaller coordination angles, while 3 is "purely" trans-spanning and no formation of identifiable cis-chelated complexes was detected. The catalytic activity of the new compounds was tested in palladium-catalyzed Mizoroki-Heck reactions of aryl bromides with cyclohexene.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.