C. S. Hudson and J. M. Johnson, J. Am. Chem. Soc. 37, 2748 (1915). [15] N. W. Pirie, Biochem. J. 30, 374 (1936). [16] D. H. Brauns, J. Am. Chem. Soc. 45, 833 (1923). [17] H. Ryan and G. Ebrill, Proc. Roy. Dublin Soc. 11, 249 (1905-1908). [18] D. H. Brauns, J. Am. Chem. Soc. 47, 1280 (1925). [19] H. H. Schlubach and R. Gilbert, Ber. deut. chem. Ges. 63, 2292 (1930). [23] P. A. Levene and A. L. Raymond, J. Biol. Chem. 102, 317, 331 (1933). 28 J. U. W. Nef, Liebigs Ann. Chem. 403, 252 (1914). 29 G. H. A. Clowes and B. Tollens, Liebigs Ann. Chem. 310, 176 (1900). 30 C. S. Hudson and H. S. Isbell, J. Am. Chem. Soc. 51, 2225 (1929). 31 G. Bertrand, Bul. soc. chim. [3] 5, 554 (1891); 19, 1001 (1898). [32] R. A. Weerman, Rec. trav. chim. 37, 40 (1917). 33 P. A. Levene and T. Mori, J. Biol. Chem. 83, 803 (1929). [34] M. Gehrke and F. Obst., Ber. deut. chem. Ges. 64, 1724 (1931). 1 Calculated from the integrated Arrhenius equation: 2.3026Xlog k2 1.9864 T2 and expressed in kilocalories. The values of Q for the slow reaction are calculated from the values of mi at approximately 0° and 20° C, while the values of Q for the fast reaction are calculated from the values of my at the same temperatures. 2 Equilibrium rotation. 3 Calculated, using logarithms to the base 10. 4 The solvent was 0.001 M acid potassium phthalate solution having a pH of 4.4 at 20° C. The solvent was prepared by adding 8.0 ml of 0.1064 N NaOH to 50 ml of 0.1000 N acid potassium phthalate and adding water to make a volume of 1 liter. The pH was 4.6 and the total molarity of the phthalate solution was about 0.005 M. REFERENCES [1] H. S. Isbell and W. W. Pigman, J. Research NBS 18, 178 (1937) RP969. [2] H. S. Isbell and W. W. Pigman, heretofore unpublished measurement. [3] H. S. Isbell and W. W. Pigman, J. Research NBS 22, 397 (1939) RP1190. [4] W. W. Pigman and H. S. Isbell, J. Research NBS 19, 191 (1937) RP1021. [5] H. S. Isbell, J. Research NBS 18, 505 (1937) RP990. [6] H. S. Isbell, heretofore unpublished measurement. H. S. Isbell, J. Am. Chem. Soc. 56, 2789 (1934). [8] H. S. Isbell, J. Research NBS 19, 639 (1937) RP1052. [9] H. S. Isbell, J. Research NBS 20, 97 (1938) RP1069. 10] H. S. Isbell, BS J. Research 5, 1186 (1930) RP253. [11] H. S. Isbell, BS J. Research 7, 1130 (1931) RP392. [12] H. S. Isbell and W. W. Pigman, J. Research NBS 20, 773 (1938) RP1104. [13] W. W. Pigman and H. S. Isbell, J. Research NBS 19, 443 (1937) RP1035. |