卡宾的动力学稳定的同源物,R 2 C,具有6个价电子(4个键电子和两个非键电子)已经被限制在第14个族元素,R 2 E(E =硅,锗,锡,铅; R =烷基或芳基),而等电子15族阳离子,[R 2 E] +类型的二价物种(E = P,As,Sb,Bi; R =烷基或芳基)是未知的。在这里,我们报告前两个例子,即双锡离子[[2,6-Mes 2 C 6 H 3)2 Bi] [BAr F 4 ](1 ; Mes = 2,4,6-Me 3 C 6 H 2,Ar F= 3,5-(CF 3)2 C 6 H 3)和锑离子[(2,6-Mes 2 C 6 H 3)2 Sb] [B(C 6 F 5)4 ](2),通过结合庞大的间-叔苯基取代基和弱配位阴离子获得。
(2,6-Mes2H3C6)2BiH, a Stable, Molecular Hydride of a Main Group Element of the Sixth Period, and Its Conversion to the Dibismuthene (2,6-Mes2H3C6)BiBi(2,6-Mes2C6H3)
Kinetic stabilization using bulky m-terphenyl substituents is the key to the isolation of the diarylantimony and diarylbismuth phosphaethynolates (2,6-Mes2C6H3)2EPCO and the related N-heterocyclic carbene complexes (2,6-Mes2C6H3)2EP(O)C(IMe4) (E=Sb, Bi; IMe4=1,3,4,5-tetramethylimidazol-2-ylidene), which have been fully characterized crystallographically and spectroscopically. The experimental characterization
使用庞大的间三联苯取代基进行动力学稳定化是分离二芳基锑和二芳基铋膦乙炔化物 (2,6-Mes 2 C 6 H 3 ) 2 EPCO 和相关的 N-杂环卡宾配合物 (2,6-Mes 2 C 6 H 3 ) 2 EP(O)C(IMe 4 ) (E=Sb, Bi; IMe 4 =1,3,4,5-四甲基咪唑-2-亚叉基),已在晶体学和光谱学上进行了充分表征。实验表征通过基于 DFT 的电子密度实空间键指标分析得到增强,包括 AIM、NCI 和 ELI-D 方法。