N‐heterocyclic nitrogen Lewis acids are a recent addition to the field of organic chemistry. Based on nitrenium cations, these acids where previously shown to generate Lewis adducts when combined with the appropriate Lewis bases. Herein, a triazinium‐based Lewis acid was combined with tBu₃P to generate a frustrated Lewis pair (FLP) capable of cleaving, for the first time, Si−H bonds in silanes. Whereas low yields were initially encountered owing to insufficient Lewis acidity, a new nitrenium‐based Lewis acid was synthesized, and its superior Lewis acidity was experimentally and computationally confirmed. A FLP based on this acid cleaved the Si−H bond in PhSiH₃, generating the triazane product in a quantitative yield. This unprecedented N−H triazane was fully characterized by multinuclear NMR techniques and single‐crystal X‐ray crystallography. A new class of compounds, N‐H triazanes display the potential capacity to participate in hydride transfer reactions.

中文翻译：

---

含氮路易斯酸的沮丧路易斯对，用于Si-H键活化

N-杂环氮路易斯酸是有机化学领域的最新成员。基于氮阳离子，这些酸先前与适当的路易斯碱结合使用时会生成路易斯加合物。在本文中，将基于三嗪鎓的路易斯酸与t Bu ₃ P结合生成了能够第一次裂解硅烷中Si-H键的失意的路易斯对（FLP）。最初由于路易斯酸度不足而导致产量较低，但合成了一种新的基于氮的路易斯酸，并通过实验和计算证实了其优越的路易斯酸度。基于该酸的FLP裂解了PhSiH _3中的Si-H键，以定量收率产生三氮烷产物。这种前所未有的NH三氮烷已通过多核NMR技术和单晶X射线晶体学进行了充分表征。NH-三氮烷是一类新型化合物，具有参与氢化物转移反应的潜在能力。