Reduction of persilylated dimethylenecyclobutene with lithium metal in 1,2-dimethoxyethane yields green crystals of persilylated dimethylenecyclobutene dianiondilithium as the first 6C-8π allyl anion system. The molecular structure, determined by X-ray crystallography, is discussed in comparison to that of the neutral starting molecule.
在 1,2-二甲氧基乙烷中用锂金属还原全甲硅烷基化二亚甲基环丁烯,得到全甲硅烷基化二亚甲基环丁烯双阴离子二锂的绿色晶体,作为第一个 6C-8π 烯丙基阴离子系统。通过 X 射线晶体学确定的分子结构与中性起始分子的结构进行了比较。