Abstract: Across-linked bead of poly (styryl) biphenylphosphine containing 5.02% of phosphine was synthesized and combined with titanium tetrachloride in chloroform to form a very stable polystyrene bound bi(triphenylphosphine) -titanium tetrachloride complex containing 15.8% of chlorine which corresponds to 0.831mmol TiCl₄/1g·complex beads. The complex can be used to catalyze a lot of organic reactions, such as esterifications, acetalizations, ketal formations and etherification in high yield. It is important that the complex as a polymer-supported Lewis acid catalyst have better stability and can be reused at least 10 times.

Key words: Polymer-supporter, Lewis acid, Catalyst and catalysis, Titanium tetrachloride