Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Equilibria in the Halogenation of Some Organic Substances in Aqueous Solution

R. P. Bell and E. Gelles
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 210, No. 1102 (Jan. 7, 1952), pp. 310-322
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/98782
Page Count: 13
  • Read Online (Free)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Equilibria in the Halogenation of Some Organic Substances in Aqueous Solution
Preview not available

Abstract

Measurements of redox potential have been used to obtain equilibrium constants for the reaction of iodine and bromine with aqueous solutions of ketones, esters and nitro-paraffins. Many of the iodination constants have an accuracy of a few per cent, but the bromination constants are not reliable to better than a power of ten. The iodination constants vary over 10 powers of ten, corresponding to considerable differences in the nature of the carbonhydrogen and carbon-iodine bonds involved. The data are used to derive the heat of the reaction RH + I → RI + H in the gas phase, and the mean value obtained (46 kcal/mole) is consistent with earlier estimates. Approximate values are also derived for the equilibrium constants of the reaction RI→ R- + I+ in solution. For variations in R these are roughly parallel with the acid dissociation constants of the reaction RH→ R- + H+.

Page Thumbnails

  • Thumbnail: Page 
310
    310
  • Thumbnail: Page 
311
    311
  • Thumbnail: Page 
312
    312
  • Thumbnail: Page 
313
    313
  • Thumbnail: Page 
314
    314
  • Thumbnail: Page 
315
    315
  • Thumbnail: Page 
316
    316
  • Thumbnail: Page 
317
    317
  • Thumbnail: Page 
318
    318
  • Thumbnail: Page 
319
    319
  • Thumbnail: Page 
320
    320
  • Thumbnail: Page 
321
    321
  • Thumbnail: Page 
322
    322