By P. H. Plesch (Eds.)
ISBN-10: 1483200965
ISBN-13: 9781483200965
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Additional info for The Chemistry of Cationic Polymerization
Sample text
G. A. OLAH and S. J. K U H N , / . Amer. Chem. Soc, 80, 6541 (1958) 42. T. G. BONNER, J. M. CLAYTON and G. WILLIAMS, / . Chem. Soc, 2867 (1957) 43. (a) D . BETHELL and V. G O L D , / . Chem. Soc, 1905, 1930 (1958) (b) D . BETHELL, V. G O L D and T. RILEY, / . Chem. Soc, 3134 (1959) (c) V. GOLD and T. RILEY, / . Chem. Soc, 2973 (1960) 44. D . BETHELL and V. GOLD, Quart. , 12, 173 (1958) 45. 46. 47. 48. 49. 50. 51. 52. 53. A. STREITWIESER, / . Amer. Chem. Soc, 74, 5288 (1952) S. F. MASON, / . Chem.
However, it seems unlikely that a four centre transition state of the type suggested would be more rigid than the original molecule. Ionization brings a decrease in entropy only in solution, where the surrounding medium may be polarized by the newly formed dipole. A further case of a gas phase reaction which apparently involves ionic intermediates is the dehydration of alcohols [50] which proceeds in solution by an ionic mechanism and is strongly catalysed by acids. In the gas phase hydrogen halides are good catalysts; in fact there is a linear relationship between the logarithm of the rate constant and the heterolytic bond dis sociation energy of the halide used as the catalyst for the same alcohol.
CHURCH, E. D . HUGHES, C. K. INGOLD 960 (1940) and N . A. TAHER, / . Chem. Soc, 979 (1940) 35. E. BERGMANN and M. , 2 1 , 378 (1933) 36. E. D . HUGHES, C. K. INGOLD and A. D . SCOTT, J. Chem. Soc, 1201, 1271 (1937) 37. H . HART and G. LEVITT, / . Org. , 2 1 , 921 (1956) 38. K. BODENDORF and H. , 516, 1 (1935) 39. K. HEALD and G. WILLIAMS, / . Chem. Soc, 362 (1954) 40. H . C. BROWN, H. W. PEARSALL, L. P. EDDY, W. J. WALLACE, M. GRAYSON and K. L. NELSON, Ind. Eng. , 45, 1462 (1953) 41. G. A. OLAH and S.
The Chemistry of Cationic Polymerization by P. H. Plesch (Eds.)
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