1. Harrison, S. A., and D. H. Wheeler, J. Amer. Chem. Soc.76, 2379–82 (1954).
2. Paschke, R. F., L. E. Peterson and D. H. Wheeler, JAOCS41, 56–60 (1964).
3. Harrison, S. A., L. E. Peterson and D. H. Wheeler, Ibid.42, 2–5 (1965).
4. Paschke, R. F., L. E. Peterson and D. H. Wheeler, Ibid.41, 723–27 (1964).
5. Wheeler, D. H., and J. White, Ibid., in press.