The isolable silylene 1 forms a frustratedLewispair with silylium ion 2 that is able to split hydrogen under ambient conditions. The protonatedsilylene 3 obtained in this reactionisomerizes to yield the hydrogen‐bridged disilyl cation 4. Cation 4 is fully characterized by NMR spectroscopy and by XRD analysis. Its formation via the protonatedsilylene 3 is indicated by independent synthesis of cation
Synthesis and structure of stable base-free dialkylsilanimines
作者:Takeaki Iwamoto、Nobuyoshi Ohnishi、Zhenyu Gui、Shintaro Ishida、Hiroyuki Isobe、Satoshi Maeda、Koichi Ohno、Mitsuo Kira
DOI:10.1039/c0nj00121j
日期:——
as air-sensitive crystals by the reaction of isolable dialkylsilylene 4 with the corresponding azides. X-ray analysis shows that 5a–5d are base-free silanimines and 5a and 5b have a remarkable bent SiN–R structure, while 5c and 5d have an almost linear structure. Distinct π(SiN)→π*(SiN) and n(N)→π*(SiN) transition bands of silicon–nitrogen double bonds were observed for 5a–5d in hexane. A mechanism
四个可分离的二烷基硅亚胺R H 2 Si NR(R = CH 2 Ph(5a),Ph(5b),1-金刚烷基(5c)和SiMe 3(5d),其中R H 2 =1,1,4,4-四(三甲基甲硅烷基)丁烷-1,4-二基通过可分离的二烷基亚甲硅烷基4与相应的叠氮化物的反应,合成了作为对空气敏感的晶体的)。X射线分析表明,5a-5d是不含碱的硅亚胺,5a和5b具有明显的弯曲Si N-R结构,而5c和5d具有几乎线性的结构。π(Si N)→ π*(Si N)和n(N)→的π*(Si N)跃迁带硅观察到对-氮双键5A-5D中正己烷。形成机制硅胺 从...的反应 甲硅烷基 和 叠氮化物 使用GRRM方法对模型反应进行理论计算讨论了这一过程。
An Isolable Potassium Salt of a Borasilene-Chloride Adduct
with multiple bonds involving silicon, examples of compounds that contain silicon–boron doublebonds (borasilenes) still remain relatively rare. Herein, we report the synthesis of the potassium salt of a chloride adduct of borasilene 1 ([2]−), which was obtained as an orange crystalline solid. Single‐crystal X‐ray diffraction analysis and reactivity studies on [2]− confirmed the double‐bond character
Dinuclear Palladium Complex with a Bridging Dialkylsilylene Ligand
作者:Chieko Watanabe、Takeaki Iwamoto、Chizuko Kabuto、Mitsuo Kira
DOI:10.1246/cl.2007.284
日期:2007.2
A novel dinuclear palladiumcomplex with one bridging dialkylsilylene ligand 6 was synthesized by the reaction of isolable dialkylsilylene 7 (R 2 Si:) with two equiv of bis(tricyclohexyl)-phosphinepalladium (8). Complex 6 as a prototypical dipalladasilacyclopropane reacts with molecular hydrogen to give dihydrosilane 10 (R 2 SiH 2 ) together with 8 and metallic palladium.
series of coinage metal complexesligated by cyclic alkylsilylenes (3M and 4M; M = Cu, Ag, Au) were synthesized by the reaction of the corresponding cyclic alkylsilylene, i.e., cyclic dialkylsilylene (CDASi) 1 or cyclic alkylaminosilylene (CAASi) 2 with 0.5 equiv of MCl (M = Cu, Ag) or AuCl-tht (tht = tetrahydrothiophene). The molecularstructures of these silylene complexes determined by XRD analysis
通过相应的环状烷基甲硅烷基,即环状二烷基甲硅烷基(CDASi)1或环状烷基氨基甲硅烷基(CAASi)反应合成了一系列由环状烷基甲硅烷基(3 M和4 M ;M = Cu、Ag、Au)连接的造币金属配合物2含 0.5 equiv 的 MCl(M = Cu、Ag)或 AuCl-tht(tht = 四氢噻吩)。通过 XRD 分析和 DFT 计算确定的这些甲硅烷基配合物的分子结构表明,双配位金属中心周围的甲硅烷基 - 金属键距离和键角取决于 π 受体能力和甲硅烷基配体的空间需求。配合物3 Cu和4 Ag由于溶液中末端硅原子之间的氯迁移而表现出流动行为。1,3-Cl 迁移的容易程度按照 Au < Ag < Cu 和3 < 4的顺序增加。通过 DFT 计算研究了这些迁移反应的机制。