Zw. Gao, Preparation of titanocene of substituted salicylic complexes in aqueous medium and substituent effects and influences of acidity, ACT CHIM S, 58(3), 2000, pp. 343-346
Two types of complexes were prepared at different pH's by the reaction of b
icyclopentadienyl dichlorotitanium - acetylacetone complex with sodium of s
ubstituted salicylic acid in aqueous medium. All of complexes were characte
rized by elementary, IR and H-1 NMR analysis. The relationship between subs
tituent and synthesis of titanocene of substituted salicylic complexes, and
their property could be explained by Hammett equation. The results shaw th
at Hammett a value has a great influence on the reaction. The larger the a
value of substituent, the easier the product transforms from A form into B
form. And the colour, decomposition temperature, IR and H-1 NMR of the prod
ucts have a certain relation to their substituent.