Facile Access to Mono- and Dinuclear Heteroleptic N-Heterocyclic Silylene Copper Complexes

Facile Access to Mono- and Dinuclear Heteroleptic N-Heterocyclic Silylene Copper Complexes
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轻松获得单核和双核杂配N-杂环硅烯铜配合物

DOI:
10.1021/om4011033
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发表时间:
2014
期刊:
影响因子:
2.8
通讯作者:
M. Driess
M. Driess
中科院分区:
化学2区
文献类型:
--
作者:
Gengwen Tan;B. Blom;Daniel Gallego;M. Driess

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将配位的N-杂环氯代亚甲硅烷基L(Cl)Si:(1; L = PhC(NtBu)2)与[Cu(tmeda)(CH 3CN)][OTf](2; tmeda = N,N,N′,N′-四甲基乙二胺,OTf = OSO 2 CF 3(triflate))反应,以高产率得到Cu(I)配合物[L(Cl)Si:→Cu(tmeda)][OTf](3),作为配位的N-杂环亚甲硅烷基铜配合物的第一个实例。类似地,L(OtBu)Si:(4; L = PhC(NtBu)2)与2的反应得到[L(OtBu)Si:→ Cu(tmeda)][OTf](5),L(NMe 2)Si:(6)与2的反应得到[L(NMe 2)Si:→Cu(tmeda)][OTf](7)。配合物3中三氟甲磺酸根阴离子的氧原子与三配位Cu(I)中心有较强的相互作用,Cu···O距离为2.312相比之下,复合物7仅具有弱相互作用(约100)。3.28 A),而在络合物5中,阳离子和阴离子完全分离。引人注目的是,螯合的氧代桥连的硅烯:Si(L)(μ2-O)(L)Si:(8)与铜源[Cu(CH_3CN)_4][OTf](9)反应得到双核络合物盐[Cu_2 {η_1:η_1-LSi(μ2-O)S…
Reaction of the heteroleptic N-heterocyclic chlorosilylene L(Cl)Si: (1; L = PhC(NtBu)2) with [Cu(tmeda)(CH3CN)][OTf] (2; tmeda = N,N,N′,N′-tetramethylethylenediamine, OTf = OSO2CF3 (triflate)) affords the Cu(I) complex [L(Cl)Si:→Cu(tmeda)][OTf] (3) in high yield as the first example of a heteroleptic N-heterocyclic silylene copper complex. Similarly, the reaction of L(OtBu)Si: (4; L = PhC(NtBu)2) with 2 affords [L(OtBu)Si: → Cu(tmeda)][OTf] (5) and that of L(NMe2)Si: (6) with 2 leads to [L(NMe2)Si:→Cu(tmeda)][OTf] (7). Complex 3 shows a rather strong interaction in the solid state between the O atom of the triflate anion and the three-coordinate Cu(I) center with a Cu···O distance of 2.312 A. In contrast, complex 7 features only a weak interaction (ca. 3.28 A), while in complex 5 the cation and anion are fully separated. Strikingly, the reaction of the chelating oxo-bridged silylene :Si(L)(μ2-O)(L)Si: (8) with the copper source [Cu(CH3CN)4][OTf] (9) affords the dinuclear complex salt [Cu2{η1:η1-LSi(μ2-O)S...
DOI: 10.1002/anie.201205570
发表时间: 2012-01-01
影响因子: 16.6
作者:
Brueck, Andreas;Gallego, Daniel;Hartwig, John F.
通讯作者: Hartwig, John F.