Polymer-Supported Stannic Chloride Complex Catalysts III. Copoly (Styrene-N-Vinylcarbazole) -Stannic Chloride Complex

The cross-linked polymer carrier beads, styrene-N-vinylcarbazole (25.5%)-diviny-Ibenzene (2,6%) copolymer, were synthesized and combined with stannic chloride in chloroform to form a stable complex containing 20.8% Cl (equivalent to 1.47 mmol SnCl4/g of complex beads). The complex showed good catalytic activity for many organic reactions such as esterification, acetalation, ketal formatiom, and etherifica-tion. The catalyst can be reused for at least six times without losing its catalytic activity.