SYNTHESIS, CHARACTERIZATION AND SOLVENT EXTRACTION STUDIES OF 3,5-BIS[(2-HYDROXYBENZYLIDENE)-AMINO]-BENZOIC ACID AND ITS CO(II) AND NI(II) COMPLEXES

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ABSTRACT 3,5-Bis[(2-hydroxy-benzylidene)-amino]-benzoic acid (H2B) and its cobalt(II) and nickel(II) complexes were synthesized and characterized via: electronic, IR, 1 H NMR and 13C NMR. Job’s continuous variation method was used to determine the mole ratio for both metal complexes. Solvent extraction studies were carried out on H2B in 5% DMF with its cobalt(II) and nickel(II) complexes using CHCl3 as organic solvent; with variable condition effects of equilibrium time, buffer pH, mineral acids, salting-out agents and complexing agents. IR spectral study indicates coordination through (N2O2) azomethine and protonated hydroxyl groups. Job’s continuous variation method showed a metal to ligand ratio, 1:1, for both metal complexes of H2B. Cobalt(II) complex of H2B showed quantitative extraction in pH range 5 – 7, while nickel(II) complex of H2B showed quantitative extraction in pH range 6 – 8. Nickel was successfully separated from cobalt by four-cycle extraction at 10-3 M HNO3 aqueous mixture of Ni(II) and Co(II) {10 µgcm-1 each} in 5% H2B/DMF using 0.05 M cyanide as masking agent and CHCl3 as organic solvent.

SYNTHESIS, CHARACTERIZATION AND SOLVENT EXTRACTION STUDIES OF 3,5-BIS[(2-HYDROXYBENZYLIDENE)-AMINO]-BENZOIC ACID AND ITS CO(II) AND NI(II) COMPLEXES
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or
+234 8093 423 853

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  • Type: Project
  • Department: Chemistry
  • Project ID: CHM0102
  • Access Fee: ₦5,000 ($14)
  • Pages: 155 Pages
  • Format: Microsoft Word
  • Views: 388
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    Type Project
    Department Chemistry
    Project ID CHM0102
    Fee ₦5,000 ($14)
    No of Pages 155 Pages
    Format Microsoft Word

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