Dry beads of polystyryl weak basic anion ex-change resin (commercial

16-50 mesh

exchange value ≥ 5 mtnol/g

activated groups -NH2

-NH-) are conbined with titanium tetrachloride in chloroform to form a stable complex containing 36.8% of chlorine which correspond to 2.59 mmol TiCl4/g complex beads. The complex can be used to catalyze a lot of organic reactions in high yield

such as esterifications

acetalizations

ketal formations and etherification

and can be reused.