A strongly twisted SiSi bond with resemblance to a buckled dimer in an unexpected isomer of hexasilabenzene.
A strongly twisted SiSi bond with resemblance to a buckled dimer in an unexpected isomer of hexasilabenzene.
复制标题
强烈扭曲的 Si·Si 键，类似于六硅苯的意外异构体中的弯曲二聚体。
DOI：
10.1039/d2dt00259k
复制
发表时间：
2022
影响因子：
4
通讯作者：
Felicitas Lips
中科院分区：
文献类型：
--
作者：
Joschua Helmer;A. Hepp;Felicitas Lips
{N（SiMe 3）Ph} SiBr 31与Rieke镁的还原脱溴产生具有两性离子特征的六顶点酰胺基取代的硅簇2，其代表六硅杂苯的前所未有的异构体。2中Si 1和Si 2的拓扑结构具有高度扭曲的二硅烯的成键特征，类似于Si（100）2 × 1重构表面的屈曲二聚体。簇2分别与NHCMe 4和DMAP形成加合物3和4。NHC加合物4另外与BH 3配位，得到饱和簇BH 3 NHCMe 4Si 6 {N（SiMe 3）Ph}6（5）。此外，2与MeI和碘加成，分别形成卤化硅簇6和7。
The reductive debromination of {N(SiMe3)Ph}SiBr31 with Rieke magnesium yields the six-vertex amido-substituted silicon cluster 2 with zwitterionic character that represents an unprecedented isomer of hexasilabenzene. The topology of Si1 and Si2 in 2 has bonding features of a highly twisted disilene and resembles that of a buckled dimer of Si(100)2 × 1 reconstructed surfaces. Cluster 2 forms the adducts 3 and 4 with NHCMe4 and DMAP, respectively. The NHC adduct 4 additionally coordinates to BH3 which affords the saturated cluster BH3NHCMe4Si6{N(SiMe3)Ph}6 (5). Furthermore, 2 undergoes addition with MeI and iodine to form the halogenated silicon clusters 6 and 7, respectively.