... Soc., 85,2282 (1963). Vejdelek, Collect. Czech. Chem. Commun., 29, 2161 (1964). Journal of the American Chemical Society I 94:16 1 August 9, 1972 Page 3. 5807 ... First-order rate constants were determined from semilog plots of (A, - At) us. time in the usual manner. ...