Naphthylbismuthol as a reagent for thin-layer chromatography of metal chelates

The chromatographic behavior of Cu(II), Pd(II), Ni(II), Co(II), and Fe(III) chelates of naphthylbismuthol was studied by thin-layer chromatography on silica gel (Silufol plates). Conditions were selected for the separation of three-component Pd(Ni)-Co-Cu chelate mixtures using mixtures of n-heptane with benzene (chloroform or toluene). It is shown that retention obeys to t he Snyder-Soczewinski displacement model and is accompanied by the displace ment of one benzene (chloroform or toluene) molecule. At high concentration s of the polar component in the mobile phase, solvates of the composition 1 : 1 are probably formed (this is also true for metal chelates of 1-(2-pyri dylazo)-2-naphthol and (1-(2-thiazolylazo)-2-naphthol).