... See eg H . Zollinger, Helv. Chim. Acta 36, 1730 (1953). See eg G. Baddeley, Nature 144, 444 (1939) ; B. M. Wepstev, in Progress in Stereochemistry, Vol. 2, p. 134 (Ed. ... 67, 1838 (1945). Page 3. Preparation of some 4-dimethylamino-azobenzene, etc. 79 (1 960) RECUEIL 979 ...