Houben-Weyl Methods in Organic Chemistry: Bromine and Iodine by Houben J., Weyl T.

By Houben J., Weyl T.

Methoden der Organischen Chemie (Methods of natural Chemistry, known as Houben-Weyl) is a regular reference paintings for chemists engaged in natural synthesis. In volumes on compound sessions, together with all Supplemental volumes, preparative equipment are handled comprehensively and significantly. Tables of examples examine an important tools and exhibit their scope. particular experimental techniques are given for the easiest tools. The reactivity and extra reactions of every compound classification also are awarded. The broad use of formulation schemes help in making the German-language volumes extra comfortably comprehensible to non-German readers.

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A) with Ridgewell, B. J. & Viney, M. (1967). jf. chem. Soc. B, p. 1204; (b) with Viney, M. (1967). J. chem. Soc. B, p. i2i i; (c) with Shakir, N. & Viney, M. (1967). J. chem. Soc. 1213. 45. Utley, J. H. P. & Vaughan, T. A. (1968). J. chem. Soc. B, p. 196. 46. Gilow, H. M. & Walker, G. L. (1967). J. org. Chem. 32, 2580. 47. (a) Brickmann, M. & Ridd, J. H. (1965). J. chem. Soc. p. 6845. , Utley, J. H. , & Ridd, J. H. (1965). J. chem. Soc. p. 6851. (c) Modro, T. A. & Ridd, J. H. (1968). J. chem. Soc.

Phys. Chem. 53, 225. (b) Bergius, F. (1910). Z. phys. Chem. 72, 338. 24. Gillespie, R. , Hughes, E. , Ingold, C. K. & Peeling, E. R. A. (1950). J. chem. Soc. p. 2504. 25. Millen, D. J. (1950). J. chem. Soc. p. 2589. 26. Bennett, G. , Brand, J. C. D. & Williams, G. (1946). J. chem. Soc. P. 87527. Cox, E. , Jeffrey, G. A. & Truter, M. R. (1948). Nature, Lond. 162, 259. 28. Olah, G. A. & Kuhn, S. J. (1964). Friedel-Crafts and Related Reactions, vol. 3 (ed. G. A. Olah), p. 1427. New York: Interscience.

The rate equation can be written in two ways, as follows: rate = k2 [ArH][HNO3] = k'2 [ArH] [NO2+], and from the observed value546 of k2, the value of the true second-order rate coefficient, k'2, for the nitration of benzene at 25 0C in 68% sulphuric acid follows as c. 4 x io 6 1 mol"1 s"1. This value approaches quite closely the value (c. 57a In both media a limit was reached beyond which the introduction of further activating substituents did not increase the rate of nitration; this limit was identified as the rate of encounter of the nitronium ions and the aromatic molecules.

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