Synthesis, structure and reactivity of a donor-stabilised silylene with a bulky bidentate benzamidinato ligand.

Synthesis, structure and reactivity of a donor-stabilised silylene with a bulky bidentate benzamidinato ligand.
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具有大体积双齿苯甲脒配体的供体稳定的亚甲硅基的合成、结构和反应性

DOI:
10.1039/c5dt01581b
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发表时间:
2015
影响因子:
4
通讯作者:
C. Burschka
C. Burschka
中科院分区:
化学2区
文献类型:
--
作者:
R. Tacke;C. Kobelt;J. A. Baus;R. Bertermann;C. Burschka

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以双(2,6-二异丙基苯基)碳二亚胺(Dipp-NCN-Dipp)为起始原料,经四步合成得到了新型给体稳定的硅烯5,并研究了其在一系列氧化加成反应和亲核取代反应中的反应活性.三配位硅(II)配合物5含有庞大的双齿脒基配体Dipp-NC(Ph)N-Dipp−和二甲基酰胺基配体。5与N2 O反应得到双核五配位硅(IV)配合物6(SiO2 N3骨架),与S8反应得到双核四配位硅(IV)配合物7(SiS 2N 2骨架)。用Se和Te处理5得到相应的四配位硅(IV)配合物8(SiSeN 3骨架)和9(SiTeN 3骨架),其分别含有SiSe和SiTe双键。5与甲硅烷基叠氮Me 3SiN 3反应得到具有SiN双键的四配位硅(IV)配合物10(SiN 4骨架),而与烷基叠氮PhSCH 2N 3反应得到四配位硅(IV)配合物11(SiSN 3骨架),这是第一个具有未取代亚甲基酰胺基配体的硅(IV)配合物。5与[Fe(CO)5]反应得到具有Si-Fe键的四配位硅(II)配合物12(SiFeN 3骨架)。化合物5-12(和前体14和15(分别具有SiCl 3 N2和SiCl 2N 3骨架的五配位硅(IV)络合物)在5的合成中)通过元素分析、晶体结构分析和固态和溶液中的多核NMR光谱研究来表征。
The novel donor-stabilised silylene 5 was prepared in a four-step synthesis, starting from bis(2,6-diisopropylphenyl)carbodiimide (Dipp–NCN–Dipp), and its reactivity was studied in a series of oxidative addition reactions and a nucleophilic substitution reaction. The three-coordinate silicon(II) complex 5 contains the bulky bidentate amidinato ligand Dipp–NC(Ph)N–Dipp− and a dimethylamido ligand. Treatment of 5 with N2O afforded the dinuclear five-coordinate silicon(IV) complex 6 (SiO2N3 skeletons), and the reaction with S8 yielded the dinuclear four-coordinate silicon(IV) complex 7 (SiS2N2 skeletons). Treatment of 5 with Se and Te afforded the respective four-coordinate silicon(IV) complexes 8 (SiSeN3 skeleton) and 9 (SiTeN3 skeleton), which contain an SiSe and SiTe double bond, respectively. The reaction of 5 with the silyl azide Me3SiN3 yielded the four-coordinate silicon(IV) complex 10 (SiN4 skeleton) with an SiN double bond, whereas the reaction with the alkyl azide PhSCH2N3 gave the four-coordinate silicon(IV) complex 11 (SiSN3 skeleton), the first silicon(IV) complex with an unsubstituted methyleneamido ligand. The reaction of 5 with [Fe(CO)5] afforded the four-coordinate silicon(II) complex 12 (SiFeN3 skeleton) with an Si–Fe bond. Compounds 5–12 (and the precursors 14 and 15 (five-coordinate silicon(IV) complexes with an SiCl3N2 and SiCl2N3 skeleton, respectively) in the synthesis of 5) were characterised by elemental analyses, crystal structure analyses and multinuclear NMR spectroscopic studies in the solid state and in solution.
甲硅烷基 PhC(NtBu)2SitBu 与 4,4′-双(二甲氨基)硫代二苯甲酮的反应以及用 3,5-二叔丁基邻苯醌处理甲硅烷基 PhC(NtBu)2SiC(SiMe3)3†
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