... 46-80. (e) G. W. Wheland, Resoncrncs in Organic Chemistry, Wiley, New York, 1955, p 337-376. ... 316-322. (g) L. P. Hammett, Physical Organic Chemis- try, McGraw-Hill, New York, 1940, Chapters VI1 and IX. ... (17) J. M. Vandenbelt, C. H. Spurlock, M. GiEels, and M. W. Eash ...