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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Some reactions of an eta(3)-tetracyanobutadienyl-ruthenium complex
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Some reactions of an eta(3)-tetracyanobutadienyl-ruthenium complex

机译:η(3)-四氰基丁二烯基-钌配合物的一些反应

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In the eta(3)-butadienyl complex Ru{eta(3)-C(CN)(2)CPhC=C(CN)(2)}(PPh3) Cp 1, which is formed from Ru(C CPh)(PPh3)(2)Cp and tcne, a CN group reacts with MeO- to give the methoxy-amide Ru{NH=C(OMe)C(CN)=CCPh=C(CN)(2)}(PPh3) Cp 2, in which the NH has displaced the C=C from the Ru centre with formation of a RuC3N ring. "Click addition" of azide to a CN group in 1 gives the oligomeric tetrazolato complex Ru{N3N[Na(OEt2)]=CC(CN)=CCPh=C(CN)(2)}(PPh3)Cp 3, also containing a RuC3N ring. Salt-elimination reactions of 3 with MeOTf, FeCl(dppe) Cp, RuCl(dppe)Cp* and trans-PtCl2{P(tol)(3)}(2) result in selective substitution at one nitrogen atom of the RuC3N ring. Geometries of 1 and the anion in 3 were computed by DFT methods. Preferences for CN groups attacked in the nucleophilic and cycloaddition reactions of 1 are supported by NBO calculations. Alkylation of 1 in reactions with 1,2-dimethoxyethane gave two isomers of Ru{N3[ CH(CH2OMe)-(OMe)] N=CC(CN)=CCPh=C(CN)(2)}(PPh3) Cp 8 and 9, differing in the sites of attachment of the alkyl group, likely by radical processes. The molecular structures of eight complexes are reported, including a re-determination of 1. Computed NMR chemical shifts are used to reassign the butadienyl carbon resonances in the C-13 NMR spectrum of 1.
机译:在eta(3)-丁二烯基复合物中,Ru {eta(3)-C(CN)(2)CPhC = C(CN)(2)}(PPh3)Cp 1由Ru(C CPh)(PPh3)形成)(2)Cp和tcne,CN基团与MeO-反应生成甲氧基酰胺Ru {NH = C(OMe)C(CN)= CCPh = C(CN)(2)}(PPh3)Cp 2其中NH通过RuC3N环的形成从Ru中心取代了C = C。将叠氮化物“点击加成”到1中的CN基团上,得到寡聚四唑络合物Ru {N3N [Na(OEt2)] = CC(CN)= CCPh = C(CN)(2)}(PPh3)Cp 3,也包含RuC3N环。 3与MeOTf,FeCl(dppe)Cp,RuCl(dppe)Cp *和反式PtCl2 {P(tol)(3)}(2)的盐消除反应导致在RuC3N环的一个氮原子上进行选择性取代。通过DFT方法计算1的几何形状和3中的阴离子。 NBO计算支持在1的亲核和环加成反应中被攻击的CN基团的偏爱。在与1,2-二甲氧基乙烷的反应中1的烷基化得到Ru {N3 [CH(CH2OMe)-(OMe)]的两个异构体N = CC(CN)= CCPh = C(CN)(2)}(PPh3)Cp 8 9和9的不同之处在于烷基的连接位点,可能是通过自由基过程。报告了8种配合物的分子结构,包括1的重新测定。计算出的NMR化学位移用于在1的C-13 NMR光谱中重新分配丁二烯碳共振。

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