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首页> 外文期刊>Chemistry: A European journal >Hydrosilylation of a silicon(II) hydride: Synthesis and characterization of a remarkable silylsilylene
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Hydrosilylation of a silicon(II) hydride: Synthesis and characterization of a remarkable silylsilylene

机译：氢化硅（II）的氢化硅烷化：一种杰出的甲硅烷基甲硅烷基的合成与表征

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摘要

The synthesis and characterization of novel monomeric silylsilylenes [{PhC(NtBu)_2}Si-Si{(NtBu)_2-C(H)Ph}R] (R = Cl (2), H (4)) are described. Compound 2 was prepared by the treatment of [{PhC(NtBu) _2}SiHCl2] (1) with two equivalents of potassium graphite, whereas compound 4 was synthesized by the treatment of 1 with four equivalents of potassium graphite. The results suggest that silicon(II) hydride intermediate [{PhC(NtBu)_2}SiH] was formed in the reduction, which underwent a hydrosilylation with the amidinate ligand of [{PhC(NtBu)_2}SiR] (R=Cl or H) to form 2 and 4, respectively. The existence of [{PhC-(NtBu) _2}SiH] in solution was demonstrated by the treatment of [{PhC-(NtBu)_2}SiCl] (3) with [K{HB(iBu)_3}]. Compounds 2 and 4 have been characterized by X-ray crystallography and NMR spectroscopy. The results show that compounds 2 and 4 are stable in solution or the solid state, and do not dimerize to form the corresponding disilene. DFT calculations show that the Si-Si bonds in 2 and 4 do not have multiple-bond character.
机译：描述了新型单体硅烷基甲硅烷基[{PhC（NtBu）_2} Si-Si {（NtBu）_2-C（H）Ph} R]（R = Cl（2），H（4））的合成和表征。通过用两当量的钾石墨处理[{PhC（NtBu）_2} SiHCl2]（1）来制备化合物2，而通过用四当量的钾石墨处理1来合成化合物4。结果表明，在还原反应中形成了氢化硅（II）中间体[{PhC（NtBu）_2} SiH]，该中间体与[{PhC（NtBu）_2} SiR]的mid酰胺配体进行了氢化硅烷化（R = Cl或H）分别形成2和4。通过用[K {HB（iBu）_3}处理[{PhC-（NtBu）_2} SiCl]（3），证明了溶液中[{PhC-（NtBu）_2} SiH]的存在。化合物2和4已通过X射线晶体学和NMR光谱表征。结果表明，化合物2和4在溶液或固态下是稳定的，并且不会二聚形成相应的二烯。 DFT计算表明，2和4中的Si-Si键没有多重键特征。

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