The addition of a series of primary and secondary amides to the group 14 (di)metallenes Mes2SiSiMes2, Mes2GeGeMes2 and (Me3Si)2SiC(OSiMe3)R, where R = t-Bu or R = 1-Ad, was examined. In general, the addition of primary and N-methyl amides gave amide adducts whereas the addition of N-phenyl amides gave imidate adducts. The regiochemistry of the additions was highly dependent upon the substituent bonded to the amide nitrogen. We propose that the formation of the adducts proceeds by way of a zwitterionic intermediate. The reactivity of tetramesityldigermene towards amides is used to predict the structure of the amide adducts formed on the Ge(100)-2 × 1 surface.
将一系列伯酰胺和仲酰胺加成到14族(双)
金属烯Mes2SiSiMes2、Mes2GeGeMes2和(Me3Si)2SiC(OSiMe3)R(其中R=t-Bu或R=1-Ad)的过程已被探究。一般来说,伯酰胺和N-甲基酰胺的加成会得到酰胺加合物,而N-苯基酰胺的加成则会得到
亚胺酸酯加合物。加成的区域
化学性质高度依赖于与酰胺氮原子连接的取代基。我们提出,加合物的形成是通过两性离子中间体的途径进行的。通过四二
甲苯二
锗的酰胺反应活性,预测了在Ge(100)-2×1表面上形成的酰胺加合物的结构。