1,5-Bis(2,5-difluorophenyl)-3-mercaptoformazan: a new tetrafluorinated dithizone analogue

Journal Article · Thu May 01 04:00:00 EDT 1980 · Sep. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/01496398008076285· OSTI ID:6970314

Kiwan, A M; Aly, H F; Wanas, G

1,5-Bis(2,5-difluorophenyl)-3-mercaptoformazan (2,2', 5.5' - tetrafluorodithizone, F/sub 4/H/sub 2/Dz) has been synthesized; its electronic spectra was found to be significantly different from that of dithizone. Its pH/sub 1/2/ in chloroform (8.4) and in carbon tetrachloride (7.4) are lower than the corresponding values (10.6 and 8.8, respectively) for dithizone. The partition coefficient of the reagent is remarkably decreased in chloroform (270) and in carbon tetrachloride (160) due to the presence of fluorine atoms, compared to the corresponding values (10/sup 4/ /sup 89/ and 10/sup 4/ /sup 18/, respectively) for dithizone. The extraction constants of its complexes with Cd(II), Cu(II), Pb(II), Co(II), Hg(II), and Zn(II) were found to be higher than the corresponding values of dithizone complexes, thus enabling their extraction from more acidic solutions. The new reagent seems also to be slightly more sensitive for Bi(III), Cd(II), Co(II), Cu(II), and Hg(II).

• Research Organization: Univ. of Kuwait
• OSTI ID: 6970314
• Journal Information: Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Journal Issue: 4 Vol. 15:4; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
CADMIUM
CARBAZONES
CARBONIC ACID DERIVATIVES
CHELATING AGENTS
CHEMICAL PREPARATION
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
COBALT
COMPARATIVE EVALUATIONS
COPPER
DITHIZONE
ELEMENTS
EXTRACTION
HALOGENATED ALIPHATIC HYDROCARBONS
LEAD
MERCURY
METALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
REAGENTS
SEPARATION PROCESSES
SILVER
SOLVENT EXTRACTION
SYNTHESIS
TRANSITION ELEMENTS
ZINC