Two types of complexes were prepared at different pH's by the reaction of bicyclopentadienyl dichlorotitanium-acetylacetone complex with sodium of substituted salicylic acid in aqueous medium. All of complexes were characterized by elementary, IR and ^1H NMR analysis. The relationship between substituent and synthesis of titanocene of substituted salicylic complexes, and their property could be explained by Hammett equation. The results show that Hammett σ value has a great influence on the reaction. The larger the σ value of substituent, the easier the product transforms from A form into B form. And the colour, decomposition temperature, IR and ^1H NMR of the products have a certain relation to their substituent.

Key words: SALICYLIC ACID P, METALLOCENES, TITANIUM COMPLEX, SUBSTITUENT EFFECT, ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY, PROTON MAGNETIC RESONANCE SPECTROMETRY, ANTINEOPLASTIC ACTIVITY