Reactions of Sn(Si( Bu)2Me)3 with HM(CO)3C5R5 (M = Cr or Mo, R = H or CH3) and Hg. Ionic, covalent, and μ-CO bonding patterns between transition metals and tin
作者:Anjaneyulu Koppaka、Xiaochen Cai、Subhojit Majumdar、Sedigheh Etezadi、Leonardo F. Serafim、Manuel Temprado、Burjor Captain、Carl D. Hoff
DOI:10.1016/j.ica.2017.09.052
日期:2018.1
enthalpy (BDE) of only 66.7 kcal/mol in HSn(Si(tBu)2Me)3 places it near the values for M-H BDE in HM(CO)3C5H5 (M = Cr, Mo) leading to a near equilibrium situation with respect to HAT. Reaction of Sn(Si(tBu)2Me)3 and elemental Hg forms the linear trinuclear HgSn2 cluster Hg[Sn(Si(tBu)2Me)3]2. The crystal structures of Hg[Sn(Si(tBu)2Me)3]2 and BrSn(Si(tBu)2Me)3 are reported.
摘要在室温下,研究了HMo(CO)3C5H5和HCr(CO)3C5R5(R = H,Me)对平面三有机锡自由基Sn(Si(tBu)2Me)3的氢原子转移(HAT)反应。戊烷溶液。Sn(Si(tBu)2Me)3和HMo(CO)3C5H5快速反应生成先前未报告的氢化锡HSn(Si(tBu)2Me)3和[Sn(Si(tBu)2Me)3] + [Mo(CO )3C5H5]-。同样,Sn(Si(tBu)2Me)3和HCr(CO)3C5H5以较慢的速度反应生成HSn(Si(tBu)2Me)3和配位为Cp(CO)2Cr CO Sn(Si(tBu)的配合物2Me)3是基于其在甲苯中的溶解度,红外光谱和计算研究。在Sn(Si(tBu)2Me)3与[Cr(CO)3C5H5] 2的反应中,快速获得与拟议的Cp(CO)2Cr CO Sn(Si(tBu)2Me)3具有相同光谱性质的产物。Sn(Si(tBu)2Me)
The First Planar, Not Twisted, Distannene − A Structural Alkene Analog. Synthesis, Isolation and X‐ray Crystallography Characterization
The synthesis of the first planar non-twisted distannene 6 is reported. The X-ray molecular structure of 6 reveals a planar geometry of both Sn atoms (Σ∡Sn=359.87°), a non-twisted Sn=Sn bond, and the shortest Sn=Sn bond of 2.599 Å among all known acyclic distannenes. Thus, 6 is the first distannene having a structure closely analogous to a classic alkene.
报道了第一个平面非扭曲二锡烯 6 的合成。 6的 X 射线分子结构揭示了两个 Sn 原子的平面几何结构 (Σ∡Sn=359.87°)、非扭曲的 Sn=Sn 键以及所有已知无环二锡烯中最短的 2.599 Å 的 Sn=Sn 键。因此, 6是第一个具有与经典烯烃非常相似的结构的二锡烯。
A High Yield Synthesis of an Octastannacubane and a Bis(silyl) Stannylene via Reductive Elimination of a Silane
along with tBu2MeSiH. Octastannacubane 9 was characterized by X‐ray crystallography, NMR and UV/Vis spectroscopy. Based on DFT quantum‐mechanical calculations the 11 → 9 transformation occurs viareductive elimination of two tBu2MeSiH molecules from 11 yielding a distannyne, (or its bis‐stannylene isomer), followed by its tetramerization.