2,2,4,4,6,6-hexamethyl-1,3,5,2,4,6-triazatrisilinane

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The starting octamethylcyclotetrasilazane should effectively be one which is secondarily produced when hexamethylcyclotrisilazane is prepared by reaction between dimethyl dichlorosilane and ammonia. Using such secondarily produced octamethylcyclotetra-silazane, the amount of hexamethylcyclo-trisilazane formed per unit starting material can be maximized. At the same time, some technical problems can be solved including elimination or treatment of octamethylcyclo-tetrasilazane in the form of a solid (melting point of 97° C.) which is left in the distillation column after removal of hexamethylcyclo-trisilazane by distillation.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 500-ml, four-necked flask equipped with a stirrer, dry ice/acetone condenser, thermometer, and gas inlet tube was charged with 64.5 grams (0.5 mol) of dimethyldichlorosilane and 150 grams of toluene. Into the solution at 30° C., 52 grams (3.06 mol) of ammonia was blown over 2 hours for effecting reaction. At the end of reaction, the reaction solution was passed through a glass filter to remove ammonium chloride resulting from the reaction. The filtrate was subjected to vacuum distillation, obtaining 15.4 grams of hexamethylcyclotrisilazane (yield 42%). A 500-ml, four-necked flask equipped with a stirrer, dry ice/acetone condenser At the end of reaction filter to remove ammonium chloride resulting from the reaction The filtrate was subjected to vacuum distillation

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: This method involves reacting dimethyldichlorosilane with ammonia in benzene at 30° C., removing ammonia chloride by-product by filtration through a glass filter or the like, and distilling the reaction product to isolate hexamethylcyclotrisilazane. at 30° C. removing ammonia chloride by-product by filtration through a glass filter the like, and distilling the reaction product

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The starting octamethylcyclotetrasilazane should effectively be one which is secondarily produced when hexamethylcyclotrisilazane is prepared by reaction between dimethyl dichlorosilane and ammonia. Using such secondarily produced octamethylcyclotetra-silazane, the amount of hexamethylcyclo-trisilazane formed per unit starting material can be maximized. At the same time, some technical problems can be solved including elimination or treatment of octamethylcyclo-tetrasilazane in the form of a solid (melting point of 97° C.) which is left in the distillation column after removal of hexamethylcyclo-trisilazane by distillation.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 500-ml, four-necked flask equipped with a stirrer, dry ice/acetone condenser, thermometer, and gas inlet tube was charged with 64.5 grams (0.5 mol) of dimethyldichlorosilane and 150 grams of toluene. Into the solution at 30° C., 52 grams (3.06 mol) of ammonia was blown over 2 hours for effecting reaction. At the end of reaction, the reaction solution was passed through a glass filter to remove ammonium chloride resulting from the reaction. The filtrate was subjected to vacuum distillation, obtaining 15.4 grams of hexamethylcyclotrisilazane (yield 42%). A 500-ml, four-necked flask equipped with a stirrer, dry ice/acetone condenser At the end of reaction filter to remove ammonium chloride resulting from the reaction The filtrate was subjected to vacuum distillation

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: This method involves reacting dimethyldichlorosilane with ammonia in benzene at 30° C., removing ammonia chloride by-product by filtration through a glass filter or the like, and distilling the reaction product to isolate hexamethylcyclotrisilazane. at 30° C. removing ammonia chloride by-product by filtration through a glass filter the like, and distilling the reaction product

Conditions: temp:97.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 200 ml volume glass flask equipped with a stirring machine, a condenser, a distillation column and a tube for distilling off the resulting product was provided. 73 g of octamethyl cyclotetrasilazane and 3.65 g of p-toluidine-m-sulfonic acid as a catalyst were introduced into the glass flask and the content of the flask was heated to 97° C. The content of the flask was stirred after it was confirmed that the octamethyl cyclotetrasilazane was completely molten. When the internal pressure of the reaction system was reduced to 65 torr with a vacuum pump to obtain a distillate, 68 g of hexamethyl cyclotrisilazane was obtained through the distillation over one hour. The resulting hexamethyl cyclotrisilazane had a high purity in the order of 99.1 GC % and the yield thereof was 93.2%. Thus, highly pure hexamethyl cyclotrisilazane could be obtained at a high yield within a short period of time. Moreover, almost no high boiling point substance remained in the reaction system. A 200 ml volume glass flask equipped with a stirring machine, a condenser a distillation column and a tube for distilling off the resulting product was provided to obtain a distillate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The starting octamethylcyclotetrasilazane should effectively be one which is secondarily produced when hexamethylcyclotrisilazane is prepared by reaction between dimethyl dichlorosilane and ammonia. Using such secondarily produced octamethylcyclotetra-silazane, the amount of hexamethylcyclo-trisilazane formed per unit starting material can be maximized. At the same time, some technical problems can be solved including elimination or treatment of octamethylcyclo-tetrasilazane in the form of a solid (melting point of 97° C.) which is left in the distillation column after removal of hexamethylcyclo-trisilazane by distillation.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 500-ml, four-necked flask equipped with a stirrer, dry ice/acetone condenser, thermometer, and gas inlet tube was charged with 64.5 grams (0.5 mol) of dimethyldichlorosilane and 150 grams of toluene. Into the solution at 30° C., 52 grams (3.06 mol) of ammonia was blown over 2 hours for effecting reaction. At the end of reaction, the reaction solution was passed through a glass filter to remove ammonium chloride resulting from the reaction. The filtrate was subjected to vacuum distillation, obtaining 15.4 grams of hexamethylcyclotrisilazane (yield 42%). A 500-ml, four-necked flask equipped with a stirrer, dry ice/acetone condenser At the end of reaction filter to remove ammonium chloride resulting from the reaction The filtrate was subjected to vacuum distillation

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: This method involves reacting dimethyldichlorosilane with ammonia in benzene at 30° C., removing ammonia chloride by-product by filtration through a glass filter or the like, and distilling the reaction product to isolate hexamethylcyclotrisilazane. at 30° C. removing ammonia chloride by-product by filtration through a glass filter the like, and distilling the reaction product