Silylene과 Silylene 전구체의 반응 특성 연구

Reaction and Characterization of Silylene and its Precusor

7, 7-dimethyl-1, 2, 3, 4, 5-pentaphenyl-7-silanorbornadiene을 과량의 methyl alcohol과 함께 저온 열분해반응을 시켰을 때 무색 침상 모양의 결정인 1-methoxydimethylsilyl-1, 2, 3, 4, 6-pentaphenylcyclohexa-2, 5-diene이 생성되었다. 그러나 7-silanorbornadiene을 ethyl alcohol과 함께 동시 광분해반응을 시켰을 때는 silylene이 생성되어 ethyl alcohol의 O-H 결합에 삽입 반응된 ethoxydimethylsilane이 생성되었다. 이와 같은 결과로 판단해 볼 때 7-silanorbornadiene의 저온 열분해반응과 광분해반응의 반응 메카니즘이 다르다는 사실을 알았다.

The mild thermal decomposition of 7, 7-dimethyl-1, 2, 3, 4, 5-pentaphenyl-7-silanorbornadiene with excess methyl alcohol proceeds to give 1-methoxydimethylsilyl-1, 2, 3, 4, 6-pentaphenylcyclohexa-2, 5-diene which is colorless needle crystal. The cophotolysis of the solution of 7-silanorbornadiene in the excess ethyl alcohol proceeds with loss of silylenes to give ethoxydimethylsilane which is insertion reaction product of silylene with O-H bond of ethyl alcohol. According to above results, it is presumed that the mechanism of photochemical decomposition and that of mild thermochemical decomposition of 7-silanorbornadiene are different.