[Synthesis of N-salicylidene leucine 3d metal complexes and studies on their thin-layer chromatography and ultraviolet spectrum].
The Schiff base derived from salicylaldehyde and leucine and its Mn(II), Co(II), Ni(II), Cu(II), Zn(II) complexes were synthesized. The purity of the products obtained was confirmed by elemental analysis. The results of elemental analysis and molar conductance show that coordination ratio with M(II) is 1:1 and its complexes are non-electrolyte in DMF. The thin-layer chromatography behavior of complexes was studied on silica gel G plate with ethyl acetate-methanol-acetone-water-acetic acid (4.44:3.33:2.22:0.25:0.12, V/V) as mobile phase. The results show that the Rf value of complexes increases as follows Mn<Zn<Ni<Cu<Co. The lambda(max) values of ultraviolet spectra of ligand and complexes are determined in methanol and DMSO. The lambda(max) values of complexes increase as follows: Mn(II)<Zn(II)<Ni(II)<Cu(II)<Co(II)<ligand. The Rf values and R band lambda(max) values of complexes change in the same direction as the stability constants of the complexes. This proves that the Rf values of complexes on silica gel G and R band lambda(max) values of complexes depend on coordinaton of M(II) with ligand.
Li
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H
Department of Chemistry, Qufu Normal University, Qufu, 273165.
Bi
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Liu
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R
D002855:Chromatography, Thin Layer / Q000379:methods; D007930:Leucine / Q000031:analogs & derivatives* / Q000138:chemical synthesis*; D008670:Metals / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
D008670:Metals; D012545:Schiff Bases; D007930:Leucine