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    STUDIA CHEMIA - Ediţia nr.3 din 2009  
         
  Articol:   STUDY OF THE CHROMATOGRAPHIC RETENTION OF SOME NEW ORGANOSELENIUM AND ORGANOTELLURIUM COMPOUNDS CONTAINING INTRAMOLECULAR INTERACTIONS BY HPTLC.

Autori:  SILVIA LENUŢA DUNCA, MONICA KULCSAR, ANCA SILVESTRU, CRISTIAN SILVESTRU, COSTEL SÂRBU.
 
       
         
  Rezumat:  

The chromatographic behaviour of some new metal complexes of organoselenium and organotellurium compounds containing intramolecular interactions, were investigated by means of different HPTLC systems with polyamide, cellulose, normal and modified silica gel thin-layers and various organic solvents of relatively high polarity. Recommendable phase system for the separation of metal-complexes is a combination of fluorescent polyamide thin-layer with a methanol-water (8:2 v/v) mixture when well-defined compact spots come out and migrate. Dark zones appeared on fluorescent green background under UV lamp (λ = 254 nm). RF values were determined by using the one-dimensional ascending technique and modelling by using different molecular descriptors calculated by using efficient software. It has been concluded that a successful analysis will be executable for the compounds studied with the possibility of modelling the chromatographic retention.

 

 Keywords: organoselenium and organotellurium compounds, lipophilicity, TLC, QSRR, MLR, PCA, PCR

 
         
     
         
         
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