Suzuki Katsunori, Numata Yasuyuki, Fujita Naoko, Hayakawa Naoki, Tanikawa Tomoharu, Hashizume Daisuke, Tamao Kohei, Fueno Hiroyuki, Tanaka Kazuyoshi, Matsuo Tsukasa
Functional Elemento-Organic Chemistry Unit, RIKEN Advanced Science Institute (ASI), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Chem Commun (Camb). 2018 Feb 27;54(18):2200-2203. doi: 10.1039/c7cc09443d.
The first free cyclobutadiene (CBD) germanium analogue was obtained as room-temperature stable dark red crystals via the reaction of the bulky EMind-substituted 1,2-dichlorodigermene with lithium naphthalenide. The cyclic 4π-electron antiaromaticity is essentially stabilized by the polar Jahn-Teller distortion in the germanium CBD producing a planar rhombic-shaped charge-separated structure.
首个游离的环丁二烯（CBD）锗类似物是通过体积庞大的EMind取代的1,2 - 二氯二锗烯与萘锂反应，以室温稳定的暗红色晶体形式获得的。锗环丁二烯中的极性 Jahn - Teller 畸变使环状 4π 电子反芳香性基本得到稳定，从而产生平面菱形的电荷分离结构。
