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, 1H 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.
YARO, U (2021). Synthesis, Characterization And Solvent Extraction Studies Of 3,5-Bis[(2-Hydroxybenzylidene)- Amino]-Benzoic Acid And Its Co(Ii) And Ni(Ii) Complexes. Afribary. Retrieved from https://afribary.com/works/synthesis-characterization-and-solvent-extraction-studies-of-3-5-bis-2-hydroxybenzylidene-amino-benzoic-acid-and-its-co-ii-and-ni-ii-complexes
YARO, UMAR "Synthesis, Characterization And Solvent Extraction Studies Of 3,5-Bis[(2-Hydroxybenzylidene)- Amino]-Benzoic Acid And Its Co(Ii) And Ni(Ii) Complexes" Afribary. Afribary, 13 May. 2021, https://afribary.com/works/synthesis-characterization-and-solvent-extraction-studies-of-3-5-bis-2-hydroxybenzylidene-amino-benzoic-acid-and-its-co-ii-and-ni-ii-complexes. Accessed 01 May. 2024.
YARO, UMAR . "Synthesis, Characterization And Solvent Extraction Studies Of 3,5-Bis[(2-Hydroxybenzylidene)- Amino]-Benzoic Acid And Its Co(Ii) And Ni(Ii) Complexes". Afribary, Afribary, 13 May. 2021. Web. 01 May. 2024. < https://afribary.com/works/synthesis-characterization-and-solvent-extraction-studies-of-3-5-bis-2-hydroxybenzylidene-amino-benzoic-acid-and-its-co-ii-and-ni-ii-complexes >.
YARO, UMAR . "Synthesis, Characterization And Solvent Extraction Studies Of 3,5-Bis[(2-Hydroxybenzylidene)- Amino]-Benzoic Acid And Its Co(Ii) And Ni(Ii) Complexes" Afribary (2021). Accessed May 01, 2024. https://afribary.com/works/synthesis-characterization-and-solvent-extraction-studies-of-3-5-bis-2-hydroxybenzylidene-amino-benzoic-acid-and-its-co-ii-and-ni-ii-complexes