Abstract
The reaction of a sterically less hindered tetrapropyl[24]dithiaamethyrin(1.0.0.1.0.0) (with antiaromatic character) and [Rh(CO)2Cl]2 synthesized a unique anti isomer of the bis(dicarbonylrhodium(I)) product, with two rhodium ions on the opposite faces of the macrocyclic ligand, and the corresponding syn isomer. Structural analyses by single-crystal X-ray diffraction, 1H nuclear magnetic resonance, and density functional theory calculations indicated that the anti isomer exhibited a stronger paratropic ring current and a more planar structure than the syn isomer. More information can be found in the Research Article by Yoshihiro Ishimaru et al.
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