Reaction of the lithium salt Li[1-R-1,2-closo-C2B10H10] with selenium under mild conditions, followed by hydrolysis gave the diselenide compound (1-Se-2-R-1,2-closo-C2B10H10)2 in contrast to the well-reported mercapto compounds 1-SH-2-R-1,2-closo-C2B10H10 obtained using a similar synthetic procedure. Details for the preparation and X-ray structural characterisation of the new compounds (2-Me-1,2-closo-C2B10H10)2Se (1), (1-Se-2-R-1,2-closo-C2B10H10)2 (R = Me,2, Ph, 3) are specified. To further explore the mechanism of the dimerization reaction, the complex [Au(1-Se-2-Me-1,2-closo-C2B10H10)(PPh3)] 4 was synthesized, confirming the existence of the intermediate Li[1-Se-2-R-1,2-closo-C2B10H10] at the early stages of the reaction before selenium oxidation. Theoretical calculations and cyclic voltammetry (CV) studies were carried out to compare the bonding nature of the sulfur and the selenium analog compounds. It was determined that diselenides have a higher tendency to reduce with respect to the disulfides and all chalcogen atoms were found to be positively charged.
                                    锂盐Li[1-R-1,2-closo-C2B10H10]与
硒在温和条件下反应后,经过
水解得到二
硒化合物(1-Se-2-R-1,2-closo-C2B10H10)2,与通过类似合成程序获得的已报道的巯基化合物1-SH-2-R-1,2-closo-C2B10H10形成对比。新化合物(2-Me-1,2-closo-C2B10H10)2Se (1)、(1-Se-2-R-1,2-closo-C2B10H10)2 (R = Me, 2, Ph, 3) 的制备和X射线结构表征的详细信息已列出。为了进一步探讨二聚反应的机制,合成了复杂物[Au(1-Se-2-Me-1,2-closo-C2B10H10)(PPh3)] 4,确认在反应早期阶段存在中间体Li[1-Se-2-R-1,2-closo-C2B10H10],这是在
硒氧化之前。进行了理论计算和循环伏安法(CV)研究,以比较
硫和
硒类似化合物的键合性质。研究表明,二
硒化物相对于二
硫化物更倾向于还原,且所有元素族的
钠原子均被发现带有正电荷。