in case of organic ligand there r several techniques for purification,but in case of metal complex(Cr,Mn,Fe,Co) with schiff base i have not seen any literature for the purification of them except recrystallization. give some suggestion..
This depends on the sensitivity of your complex. I.e. iron cyclopentadienone are perfectly air- and water-stable, and as so they are a perfect example of iron complexes which can be purified using column chromatography.
It depends on the complex. For instance [Ru(bpy)3]2+ complexes can be purified on silica with eluents such as AcN: H2O: KNO3 (exchange counter anion by the nitrates)
Otherwise you can use neutral alumina it works fine for some complexes like Mn
Yes you can doing depending from their polarity and the polarity of byproducts as well as their stability to the solvent.
You can prepare a 2D TLC to check if the complex is stable on silica gel. You can also try reversed phase or aluminiumoxide as column materials. It depends on your complex, but it could be possible.
Silica and normal alumina are acidic and can damage or destroy many metal complexes. If that happens for your complex, try neutral or basic alumina as the stationary phase of your column.
Yes and it depends you may need to neutralize the acidic sites on silica and alumina via pre-treatment with Et3N
..sir i m using schiff base ligands. with transition metals(Cr,Fe,Co,Ni) ...in that case what is ur suggestion
Schiff-base ligands are usually not stable against silica or aluminium oxide chromatography but I never checked the metal complexes. I would try precipitation of your metal complexes by addition of a non solvent (maybe additional cooling).
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