Abstract: Thirty-two derivatives of bis-(cyclopentadienyl)-di-(aryloxy)-titanium, zirconium and hafnium have been separated by thin-layer chromatograghy (TLC) using silica gel as absorbent and toluene-acetone(30: 1) or toluene-p-dioxane(30:1) as developer. According to the Rf values of the compounds as well as (3 values of their cyclopentadienyl ring protons, their separating rules In thin-layer chromatography were discussed.