Boranyl‐Functionalized [Ge
<sub>9</sub>
] Clusters: Providing the Idea of Intramolecular Ge/B Frustrated Lewis Pairs
作者:Christoph Wallach、Felix S. Geitner、Antti J. Karttunen、Thomas F. Fässler
DOI:10.1002/anie.202012336
日期:2021.2
[Ge9Si(TMS)3}2]2− (TMS=trimethylsilyl) with 2‐chloro‐1,3,2‐diazaborolidines DABR‐Cl leads to the first boranyl‐functionalized [Ge9] clusters [Ge9Si(TMS)3}2DABR]− (R=methyl (1 a), iso‐propyl (2 a), ortho‐tolyl (3 a)). The anions 2 a and 3 a were structurally characterized as [NHCDippCu]+ complexes (NHCDipp=1,3‐di(2,6‐diisopropylphenyl)imidazolylidine) through single crystal X‐ray structure determination
球形同原子九原子锗簇独特的三维结构为官能团的空间排列开辟了多种可能性。包含孤对的配体最近被引入到簇球中,我们现在报告了在具有 Ge−B外型簇键的簇中添加了硼烷基。双甲硅烷基化簇[Ge 9 Si(TMS) 3 } 2 ] 2− (TMS=三甲基甲硅烷基)与2-氯-1,3,2-二氮杂硼烷DAB R ‐Cl的反应导致第一个硼烷基官能化[Ge 9 ]簇[Ge 9 Si(TMS) 3 } 2 DAB R ] - (R=甲基( 1a )、异丙基( 2a )、邻甲苯基( 3a ))。通过单晶X射线结构测定,阴离子2a和3a的结构被表征为[NHC Dipp Cu] +配合物(NHC Dipp =1,3-二(2,6-二异丙基苯基)咪唑基)。量子化学计算显示了硼烷基官能化簇[Ge 9 Si(TMS) 3 } 2 BCy 2 ] - ( 4 a )的挫败路易斯对(FLP)特征。