Abstract
Derivatives of 2,2″-dimethyl-ortho-terphenyl have been prepared and their conformational study was carried out by variable temperature NMR analysis. These molecules showed presence of atropisomers due to the restricted rotation about the aryl-aryl (ArAr) and aryl-CH2 (ArCH2) bonds. The barrier of their interconversion was determined as a function of ΔG‡, the transition state free energy at coalescence temperature.
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