“Giant” Gyroscope‐Like Molecules Consisting of Dipolar Cl‐Rh‐CO Rotators Encased in Three‐Spoke Stators That Define 25–27‐Membered Macrocycles
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(Chemical Equation Presented) Yet another feat for the Crubbs catalyst: Reactions with 1a,b followed by hydrogenations give 2a,b. The sizeable cavities of 2, which were characterized crystallographically, allow for rapid Cl-Rh-CO rotation in solution. Reactions with ArC≡CLi give ArC≡C-Rh-CO species; when the aryl group is sufficiently large, it is confined between two macrocycles, blocking rotation. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.
author list (cited authors)
Wang, L., Hampel, F., & Gladysz, J. A.