Cleavage of a N−H Bond of Ammonia at Room Temperature by a Germylene

The reaction of LGeCl [1; L = CH{(CMe)(2,6-iPr2C6H3N)}2] with 1,3-di-tert-butylimidazol-2-ylidene results in the formation of the germylene L′Ge [2; L′ = CH{(CCH2)(CMe)(2,6-iPr2C6H3N)2}]. 2 reacts with ammonia under N−H cleavage to give LGeNH2 (3). This type of reaction can also be used to activate primary amines. 3 is characterized by microanalysis, multinuclear NMR spectroscopy, and X-ray structural analysis. The single-crystal X-ray structural analysis indicates 3 to be a monomer, and the germanium atom shows a trigonal-pyramidal environment with a stereochemically active lone pair.

LGeCl[1；其中L为CH{(CMe)(2,6-iPr₂C₆H₃N)}₂]与1,3-二叔丁基咪唑-2-卡宾发生反应，生成锗烯（germylene）L′Ge[2；其中L′为CH{(C=CH₂)(CMe)(2,6-iPr₂C₆H₃N)₂}]。化合物2在N-H键断裂条件下与氨反应，得到LGeNH₂（3）。该类反应同样可用于活化伯胺类化合物。通过微量元素分析、多核核磁共振波谱法与X射线结构分析对化合物3进行了表征。单晶X射线结构分析结果表明，化合物3为单分子结构，锗原子呈现三角锥配位环境，且带有具有立体化学活性的孤对电子。