caa a22 4500 467953430 CHVBK 20180405193744.0 cr unu---uuuuu 170328e20050201xx s 000 0 eng 10.1007/PL00021917 doi (NATIONALLICENCE)springer-10.1007/PL00021917 (NATIONALLICENCE)springer-10.1007/s10809-005-0040-y Azo derivative of 2-thenoyltrifluoroacetone as a reagent for the photometric determination of copper(II) [Elektronische Daten] [R. Alieva, F. Chyragov, K. Makhmudov] 1-(2-Thenoyl)-4-trifluoro-2-[2-hydroxy-3-sulfo-5-nitrophenylazo]butadione-1,3 (H2L) was synthesized from 2-thenoyltrifluoroacetone. The formation of a copper(II) complex of the synthesized reagent was studied in the presence and absence of 8-hydroxyquinoline (HR). Monoligand [Cu(HL)2 ] and mixed-ligand [Cu(HL)2HR] compounds were obtained at pH 4 and 3, respectively. The ratio of components in the monoligand and mixed-ligand compounds were 1 : 2 and 1 : 2 : 1, respectively. Beer's law was obeyed in the ranges of copper concentrations from 0.20 to 2.56 and from 0.25 to 2.56 µg/mL, respectively. The dissociation constants of the reagent were .K1=4.25µ0.01 and .K2=8.20µ0.01 . The stability constants of [Cu(HL)2] and [Cu(HL)2HR] complexes were K1=4.96µ0.03 and 4.92µ0.01, respectively. A procedure was developed for the photometric determination of copper(II) in rocks. MAIK "Nauka/Interperiodica”, 2005 Alieva R. Department of Chemistry, Baku State University, ul. Z. Khalilova 23, 370148, Baku, Azerbaijan aut Chyragov F. Department of Chemistry, Baku State University, ul. Z. Khalilova 23, 370148, Baku, Azerbaijan aut Makhmudov K. Department of Chemistry, Baku State University, ul. Z. Khalilova 23, 370148, Baku, Azerbaijan aut Journal of Analytical Chemistry Nauka/Interperiodica 60/2(2005-02-01), 137-140 1061-9348 60:2<137 2005 60 10809 https://doi.org/10.1007/PL00021917 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00021917 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alieva R. Department of Chemistry, Baku State University, ul. Z. Khalilova 23, 370148, Baku, Azerbaijan aut NATIONALLICENCE 700 1- Chyragov F. Department of Chemistry, Baku State University, ul. Z. Khalilova 23, 370148, Baku, Azerbaijan aut NATIONALLICENCE 700 1- Makhmudov K. Department of Chemistry, Baku State University, ul. Z. Khalilova 23, 370148, Baku, Azerbaijan aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 60/2(2005-02-01), 137-140 1061-9348 60:2<137 2005 60 10809 NATIONALLICENCE 856 40 https://doi.org/10.1007/s10809-005-0040-y text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer