Abstract
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 1H, 13C, and 31P 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.
Original language | English |
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Pages (from-to) | 5139-5145 |
Number of pages | 7 |
Journal | Organometallics |
Volume | 27 |
Issue number | 19 |
DOIs | |
State | Published - 13 Oct 2008 |