... (6) J. March, “Advanced Organio Chemistry,” McGraw-Hill, New York, NY,1968, p 704. (7) Cf. C. K. Ingold, “Structure and Mechanism in Organic Chemistry,” CornellUniversityPress, Ithaca, N. Y., 1953, pp 562-566. ... Chem., Int. Ed. Engl., 8, 250 (1964). ...