Cyclohexene → CID 15879360

Participants

Reaction Conditions

Reaction Steps

A 250 ml, three-necked, round-bottomed flask was sparged with nitrogen and equipped with a 50 ml dropping funnel, a thermometer, a stir bar, and a septum. The flask was charged with 46.25 ml (46.25 mmol) BH3.THF adduct and cooled to 0° C. in an ice bath. The dropping funnel was then charged with 9.37 ml (92.5 mmol) cyclohexene and 36 ml tetrahydrofuran (THF). The cyclohexene/THF mixture was added dropwise over 45 min. A white solid (dicyclohexylborane) formed. The reaction mixture was stirred for one hour at 0° C. The dropping funnel was then charged with 11.76 g (138 mmol) methylvinylsilazane, (MeSiViNH)x and 36 ml THF and added to the reaction mixture over thirty minutes. After the polysilazane addition was complete, the reaction mixture was stirred for 45 minutes at 0° C. and then warmed to room temperature. The white solid had disappeared and a clear solution was formed. The boron-substituted polysilazane, Polymer II, contained about 2.5 wt % boron bound to the polymer backbone. This solution was used in the following example.

Provenance & Evidence