الفهرس 
ContentsOnly 14 pages are availabe for public view
 |  | from | 224 |  |  |
| | | from | 224 | | |
Abstract
The distribution of o-,m-,p- Iodoanilines and o-,M-,P¬fluoroanilines was studied between petroleum ether and aqueous solutions of sodium chloride of different concentrations,at different temperatures.
Petroleum ether (b.p.90°-130°C) was used as extracting (42)
0 L
S -’vent because benzene leads to high distribution coefficients, the volumes of the two phases were arranged so as to keep the amount of amine in the aqueous phase approximately equal to that present in the organic phase, in which it was estimated , since the former was found by difference, and to minimize any errors due to association hydration or other disturbing factors(32) The amine in the organic layer was estimated by ultraviolet absorption spectrophotometry.
The distribution coefficients,m p /m a were determined in terms of molalities of the amine , between petroleum ether and aqueous chloride solution.
The activity coefficient of the amine in the aqueous sodium chloride solution was evaluated (129) from the value of mp/ma and the corresponding value at zero molality , taking zero molality as the standard state,when ,by definition,f=1, and taking the activity coefficient of the amine ,in the organic phase ,equal to unity.