1-Phenylcyclopentylacetaldehyde (I) and 1-phenylcyclohexylacetaldehyde (11) have been prepared and characterized. The rearrangement percentages upon di-t-butyl peroxide- induced decarbonylation in the liquid phase under various conditions have been determined (Table V). The results indicate that the 1, 2-phenyl shift is markedly more facile in I1 than in I. arguments are presented that this ring size effect results from differences in ...
