PRIMARY DEPEDENCE OF 7-ARYL-2,5-DI-t-BUTYL-1,3,5-CYCLOHEPTATRIENE VALENCE TAUTOMERISM ON THE Π-ACCEPTOR STRENGTH OF THE 7-ARYL SUBSTITUENT

Article abstract of DOI:10.1016/S0040-4039(01)92397-4

13C NMR studies showed that the population of the norcaradiene form of the title systems containing p-CH3O, H, and p-CF3 on the 7-aryl group increases in this order.The result is consistent with the prediction from the Π-acceptor strength of the aryl grou