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Helena Majstorović Institute AIC “Tamiš” Novoseljanski put 33 26000 Pančevo Yugoslavia

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Živoslav Tešić University of Belgrade Faculty of Chemistry Studentski trg 16 P.O. Box 158 11001 Belgrade Yugoslavia

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Dušanka Milojković-Opsenica University of Belgrade Faculty of Chemistry Studentski trg 16 P.O. Box 158 11001 Belgrade Yugoslavia

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The chromatographic behavior of four mixed tris ( β -diketonato) complexes of the type [Co(acac) 3− n (phacphac) n ] ( n = 0–3), three ( β -ketoiminato)-Cu(II) complexes, two tris (alkylxanthato)-Co(III) complexes, and five bis (alkylxanthato)-Ni(II) complexes has been studied on thin layers of CN-silica gel with fifteen mobile phases, thirteen of which resulted in normal-phase systems. Linear relationships were established between the RM values of tris ( β -diketonato) complexes and the amount [% v/v ] of acetone in hexane-acetone mobile phases, and between the RM values of these complexes and the number of acac ligands substituted by phacphac ligands. The results obtained were compared with previously observed chromatographic behavior of the same substances on thin layers of silica gel and polyacrylonitrile. The corresponding separation mechanisms were also considered. It was assumed that under conditions of normal-phase chromatography with solvents of low polarity the retention behavior of complexes containing aromatic rings in the molecule is mainly determined by donor-acceptor interactions of the cyano groups of the adsorbent with the π -electron systems of the substances being separated.

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Journal of Planar Chromatography - Modern TLC
Language English
Size A4
Year of
Foundation
1988
Volumes
per Year
1
Issues
per Year
6
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0933-4173 (Print)
ISSN 1789-0993 (Online)

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