AbstractA heteroleptic amino(imino)stannylene (TMS2N)(ItBuN)Sn: (TMS=trimethylsilyl, ItBu=C[(N−tBu)CH]2) as well as two homoleptic NHI‐stabilized tetrylenes, (ItBuN)2E: (NHI=N‐heterocyclic imine, E=Ge, Sn) are presented. VT‐NMR investigations of (ItBuN)2Sn: (2) reveal an equilibrium between the monomeric stannylene at room temperature and the dimeric form at −80 °C as well as in the solid state. Upon reaction of the homoleptic tetrylenes with CO2, both compounds insert two equivalents of CO2, however differing bonding modes can be observed. (ItBuN)2Sn: (2) inserts one equivalent of CO2 into each Sn−N bond, giving carbamato groups coordinated κ2O,O’ to the metal center. With (ItBuN)2Ge: (3), the Ge−N bonds stay intact upon activation, being bridged by one molecule of CO2 respectively, forming 4‐membered rings. Furthermore, the reactivity of 2 towards N2O was investigated, resulting in partial oxidation to form stannylene dimer [((ItBuN)3SnO)(ItBuN)Sn:]2 (6).
摘要 介绍了一种杂环氨基(亚氨基)锡烯 (TMS2N)(ItBuN)Sn:(TMS=三甲基硅基,ItBu=C[(N-tBu)CH]2)以及两种同环 NHI 稳定的锡烯 (ItBuN)2E:(NHI=N-杂环亚氨基,E=Ge,Sn)。对 (ItBuN)2Sn: (2) 的 VT-NMR 研究表明,在室温下,单体锡烯与在 -80 °C 和固态下的二聚体之间达到了平衡。当均相四亚甲基苯与二氧化碳反应时,两种化合物都会插入两个当量的二氧化碳,但可以观察到不同的成键模式。(ItBuN)2Sn:(2) 在每个 Sn-N 键上插入一个当量的 CO2,从而产生与金属中心配位的 κ2O,O' 氨基甲酸基团。对于 (ItBuN)2Ge:(3),Ge-N 键在活化后保持不变,分别被一分子 CO2 桥接,形成四元环。此外,还研究了 2 对 N2O 的反应性,结果是部分氧化形成锡烯二聚体 [((ItBuN)3SnO)(ItBuN)Sn:]2 (6)。