A donor‐stabilized 1,3‐disila‐2,4‐diazacyclobutadiene presents an exceptionally short nonbonded Si⋅⋅⋅Si distance (2.23 Å), which is as short as that of Si=Si bonds (2.15–2.23 Å). Theoretical investigations indicate that there is no bond between the two silicon atoms, and that the unusual geometry can be related to a significant coulomb repulsion between the two ring nitrogen atoms. This chemical pressure
供体稳定的1,3-二
硅2-2,4-二
氮杂环丁二烯具有极短的未键合Si⋅⋅⋅Si距离(2.23Å),与Si = Si键(2.15-2.23Å)一样短。理论研究表明,两个
硅原子之间没有键,并且异常的几何结构可能与两个环氮原子之间的显着库仑排斥有关。与传统的物理方法相比,这种
化学压力现象可以为挤压高应变结构中的范德华斯空间提供另一种更好的方法。