Collect. Czech. Chem. Commun.
1994, 59, 582-588
https://doi.org/10.1135/cccc19940582
Examination of the Conditions of Extraction of Toxic Organic Bases and of Methods of Their Determination. III. Extraction of Ion-Associates of Dibenz[b,f]-1,4-oxazepin
Jan Součeka, Ladislav Belickýa and Josef Havelb
a Department of Chemistry, The Military College of Ground Forces, 682 03 Vyškov, Czech Republic
b Department of Analytical Chemistry, Masaryk University, 600 00 Brno, Czech Republic
This article is part of serial Examination of the Conditions of Extraction of Toxic Organic Bases and of Methods of Their Determination.
Abstract
The protonation and distribution constants of dibenz[b, f]-1,4-oxazepin (CR) were measured. This substance forms stable ion-associates with Acid Red 88, extractable into chloroform. Reextraction with an aqueous phase containing basic fuchsine or safranine T brings about exchange of the CR cation for the basic dye cation. The associates so formed exhibit higher conditional extraction constants and higher molar absorptivities than the initial associates.
