JPC - Journal of Planar Chromatography - Modern TLC
Volume/Issue:
Volume 17: Issue 4
The effect of the electronegativity of donor atoms in coordinated β -diketonato ligands on the chromatographic behavior of metal complexes
Authors:
Rada Baošić University of Belgrade Faculty of Chemistry Studentski trg 16 P.O. Box 158 11001 Belgrade Serbia and Montenegro

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

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

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Pages:
250–254
Online Publication Date:
08 Mar 2007
Publication Date:
01 Aug 2004
Article Category:
Research Article
DOI:
https://doi.org/10.1556/jpc.17.2004.4.2
Keywords:
Thin-layer chromatography; Silica gel; β-Diketonato complexes; Ligand substituents; Donor atom electronegativity
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The effect on chromatographic behavior, on thin layers of silica gel, of the electronegativity of ligator atoms has been studied for three series of β-diketonato complexes of the type [M(acac) 3− n (phacphac) n ], [M(acac) 3− n (phacphSac) n ], and [M(acac) 3− n (phSacphSac) n ] (where M represents cobalt(III), chromium(III) or ruthenium(III), acac is the 2,4-pentanedionato ion, phacphac is the 1,3-diphenyl-1,3-propanedionato ion, phacphSac is 3-mercapto-1,3-diphenyl-prop-2-en-1-one, phSacphSac is the 3-mercapto-1,3-diphenyl-prop-2-en-1-tion ion, and n = 0–3). For chromatographic separations, ten typical normal-phase mobile phases were used, five mono-component and five two-component. For all the complexes examined it was found that substitution of the donor oxygen atom by a less electronegative sulfur atom resulted in increased mobility of the complex. It was also established that substitution of the acac ligand resulted in increased hRF values. For all the complexes examined a linear dependence was observed between the RM values of the complexes and the number of acac ligands substituted by phSacphSac ligands. On the basis of these results, possible separation mechanisms are discussed.

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Cover JPC - Journal of Planar Chromatography - Modern TLC
JPC - Journal of Planar Chromatography - Modern TLC
Print ISSN:
0933-4173
Online ISSN:
1789-0993

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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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