The hydrolyses of an unsymmetrical ketene 0, O-acetal (2, 2-dichloro-l-ethoxy-l- phenoxyethylene, 1) and of two ketene 0, s-acetals [2, 2-dichlor0-l-ethoxy-l-ethylthioethylene (2) and 1-ethylthio-1-phenoxyethylene (3)] have been studied in acidic solution at 30'. The observed catalysis by hydronium ion and acetic acid, the deuterium solvent isotope effect (kH/kD= 3.0 with 3), and the nonlinear dependence of rate on buffer concentration at ...
