作者:Andrey G. Moiseev、William J. Leigh
DOI:10.1021/ja0653223
日期:2006.11.1
pulsed laser photolysis of 1,1,3,3-tetramethyl-2,2-diphenyl-1,2,3-trisilacycloheptane affords diphenylsilylene (SiPh2) with significantly higher selectivity than that reported previously from other SiPh2 precursors, allowing the direct detection of SiPh2 in solution for the first time. The UV/vis spectrum of the silylene in anhydrous hexane at 25 degrees C, determined by laser flash photolysis methods
1,1,3,3-四甲基-2,2-二苯基-1,2,3-三硅杂环庚烷的灯或脉冲激光光解法提供的二苯基亚甲硅烷基(SiPh2)的选择性比以前从其他SiPh2前体中报道的要高得多,因此可以直接进行首次检测溶液中的SiPh2。通过激光快速光解法测定,在25°C的无水己烷中,亚甲硅烷基的UV / vis光谱与在冷冻烃基体中获得的光谱相符,并初步确定了二聚化产物四苯基二ilene的光谱。SiPh2与许多特征性甲硅烷基清除剂反应的绝对速率常数与先前报道的具有相同或相似底物的SiMe2的绝对速率常数非常接近。