A bidentate ligand with an integrated anion receptor forms dimeric rhodium complexes that become monomeric upon binding acetate guest, which is the basis for effector responsive hydroformylation catalysis.
Dimeric rhodium(ii) [Rh(L)(CH3CN)]2(PF6)4 and rhodium(iii) peroxide [Rh(L)(PPh3)]2(μ–η1:η1-O2)(PF6)4 and [Rh(L)(PCy3)]2(μ–η1:η1-O2)(PF6)4 (L = bis(N-pyridylimidazolylidenyl)methane) were reported.
The title compound, [Rh2(C7H5O2)4(C5H11N)2], an adduct of dimeric rhodium(II) benzoate with piperidine, was prepared. The complex lies across an inversion centre with the unique RhIIion in a slightly distorted octahedral coordination environment.
Correction for ‘Chemoselective dehydrogenative esterification of aldehydes and alcohols with a dimeric rhodium(ii) catalyst’ by Junjie Cheng et al., Chem. Sci., 2016, 7, 4428–4434.
Experimental and Theoretical Study on the Role of Monomeric vs Dimeric Rhodium Oxazolidinone Norbornadiene Complexes in Catalytic Asymmetric 1,2- and 1,4-Additions