ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The polarity index, retention index, coefficient ϱ and partial Gibbs function of one mole of a solute methylene group and the Sevcik A criterion were determined at different temperatures for some aromatic hydroxyoximes and intermediate ketones by means of gas-liquid chromatography using n-alkanes as nonpolar agents and n-alcohols as polar agents. The relations between these parameters and the relations between the polarity and the compound structure were discussed.In the oxime and ketone molecules the polarity of the hydrophilic groups changes in the following order: —OH〉=NOH〉—O—;and —OH〉—C=O〉—O—, respectively. The ketones have less polarity than the oximes. The phenolic hydroxyl group has twice the polarity of the oxime and the carbonyl groups. The chlorine atom at the ortho position in relation to the hydroxyl group sharply increases the polarity.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19853270302
Permalink
