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Complexes of Cu(II) nitrate and chloride salts with p-chloro-, p-bromo-and p-iodo-anils of 2-thiophene glyoxal, isolated as binary mixtures of isomers, were separated on thin-layers of silica gel. Separation of mixtures in bulk and of their known quantity was done by column chromatography for determination of isomeric composition of isolates. Resolved isomers were identified using correlation of their R F with spectral properties. The effect of chelate ring contraction on R F values has also been investigated.

Imino-oxazolidinones, the cyclocondensation products of chloroacetanilides with potassium cyanate and their condensation products with vanillin including isomers have been chromatographed on starch bound silica gel thin-layers using one and two component solvent systems and effects of various properties of developing solvents and migrating species on R F values have been investigated in addition to the separation, identification and estimation.

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Isomeric complexes of, p-chloro, p-bromo, and p-iodo -anils of 2-thiophene glyoxal ligands have been synthesized and characterized by metal analysis, molecular weight, infrared and UVVisible spectroscopy, molar conductance and magnetic measurements. All non electrolytic complexes are square planar paramagnetics. Among all of the compounds only p-bromo and p-iodo-anils of 2-thiophene glyoxal exhibited good antifungal activity against both test fungi but all products showed moderate to good bactericidal effect against S.aures and X.holicicola bacteria.