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55.1 g of tetracyclohexyltin (122 mmol) and 50 ml of toluene were mixed together in a 200 ml eggplant type flask, and containing a stirrer. Then, 18.1 ml of tin tetrachloride (155 mmol) was added, and the mixture was refluxed for 3 hours. Upon completion of the reaction, the mixture was cooled to 0° C., and 30 ml of water and 50 ml of hexane were added. After the hexane layer was separated, the solid precipitate, which had been precipitated by removing the solvent under reduced pressure, was washed with 20 ml of acetonitrile, and dried under a vacuum, to yield 39.1 g of the final product (yield=59.5%).

1. additioncontaining a stirrer
2. temperaturethe mixture was refluxed for 3 hours
3. customUpon completion of the reaction
4. customAfter the hexane layer was separated
5. customthe solid precipitate, which had been precipitated
6. customby removing the solvent under reduced pressure
7. washwas washed with 20 ml of acetonitrile
8. customdried under a vacuum