... for 2 h, while, under the same conditions, addition of 2 (1) This work was reported in part at the 1st European Symposium on Organic Chemistry (ESOC I), Cologne, West Germany, Aug 20-23, 1979. ... Chem. Ges, 64,2823 (1931); D. A. Semenow, EF Cox, and J. D. Roberts, J. Am. ...