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Analytical studies of the complexes of 5-(X-NO2 phenylazo )-8-hydroxyquinaldine with Indium ion | ||
| basrah journal of science | ||
| Article 1, Volume 25, Issue 1, 2007, Pages 53-66 PDF (0 K) | ||
| Author | ||
| Hanan M. Ali | ||
| Abstract | ||
| The reaction of 5-(X-phenylazo)-8-hydroxyquinaldine derivative [X=m-NO2(I) and p-NO2 (II)] with In+3 ions in solutions showed that 1:1 and 1:2 complexes were formed. The formed complexes were found to be a suitable method for direct spectrophotometric micro determination of indium ion . Beers law was obeyed over the range (2-16) and (2-14) ppm of In+3 with complexes (I) and (II) respectively. The molar absorptivity is 14000 and 35000 mol- 1 cm-1 for (I) and (II) respectively. The stepwise stability constants of complexes were calculated by applying the corresponding solutions method The melting point of complexes were measured [(158-160)C0 for I and (201-203)C0 for II] respectively, and the infrared spectra of the formed complexes were measured using (KBR) disk. | ||
| Keywords | ||
| absorption; Sequence of addition; Isopestic point; Stoichiometry; Colman | ||
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