Straightforward Access to Tetrametallic Complexes with a Square Array by Oxidative Dimerization of Organometallic Wires

Straightforward Access to Tetrametallic Complexes with a Square Array by Oxidative Dimerization of Organometallic Wires
复制标题

通过有机金属线的氧化二聚直接获得方形阵列的四金属配合物

DOI:
10.1021/om4003768
复制
发表时间:
2013
期刊:
影响因子:
2.8
通讯作者:
Burgun A
Burgun A
中科院分区:
化学2区
文献类型:
--
作者:
Burgun A

文献摘要

参考文献

被引文献

相似文献

合成了钌配合物{Cp(dppe)Ru}2(μ-C <$CC <$CC <$C)(3; Cp = Ru,dppe = 1,2-双(二苯基膦基)乙烷),测定了其分子结构。3的循环伏安图具有三个可逆的单电子事件,两个第一波之间的电位差很大(ΔE° = 0.44 V),表明MV(mixed-valence)3(PF 6)具有很高的热力学稳定性,可认为它是III类MV配合物。配合物3(PF 6)是在−78 °C下用1当量[FeCp 2](PF 6)处理3定量制备的,并通过EPR光谱进行表征。在-10 °C以上,3(PF 6)的溶液提供不对称四核配合物{cyclo-C([Ru])C(CCCC[Ru])C(CC [Ru])C(CC [Ru])}(PF 6)2(4(PF 6)2; [Ru] = Cp(dppe)Ru),其区域特异性地形成并以92%产率分离。因此,尽管热力学稳定的monocation radical 3(PF 6)的电化学数据证明,和广泛的离域电子结构,缓慢的二聚反应发生,提供一个稳定的,四核配合物。通过单晶X射线衍射研究、循环伏安法和多核NMR、IR、UV-vis和近红外光谱对新化合物进行了表征,并在DFT理论水平的量子化学研究的支持下对数据进行了分析。二聚反应的区域特异性受空间和电子因素的平衡控制,这有利于分子间(Cα+ Cγ)自由基偶联。
The bimetallic ruthenium complex {Cp(dppe)Ru}2(μ-CCCCCC) (3; Cp = cyclopentadienyl, dppe = 1,2-bis(diphenylphosphino)ethane) has been prepared and the molecular structure determined. The cyclic voltammogram of3is characterized by three reversible one-electron events with a large potential difference between the two first waves (ΔE° = 0.44 V), indicating the large thermodynamic stability of the MV (mixed-valence)3(PF6), which can be considered as a class III MV complex. The complex3(PF6) was quantitatively prepared by treatment of3with 1 equiv of [FeCp2](PF6) at −78 °C and characterized by EPR spectroscopy. Above −10 °C, solutions of3(PF6) provide the asymmetric tetranuclear complex {cyclo-C([Ru])C(CCCC[Ru])C(CC[Ru])C(CC[Ru])}(PF6)2(4(PF6)2; [Ru] = Cp(dppe)Ru) which was formed regiospecifically and isolated in 92% yield. Thus, despite the thermodynamic stability of the monocation radical3(PF6) as evidenced by the electrochemical data, and the extensively delocalized electronic structure, a slow dimerization reaction takes place, affording a stable, tetranuclear complex. The new compound was characterized by a single-crystal X-ray diffraction study, cyclic voltammetry, and multinuclear NMR, IR, UV–vis, and near-IR spectroscopy, and the data were analyzed with the support of quantum chemical investigations at the DFT level of theory. The regiospecificity of the dimerization reaction is controlled by a balance of steric and electronic factors, which favors intermolecular (Cα+ Cγ) radical coupling.
DOI: 10.1021/om9507991
发表时间: 1996
期刊: Organometallics
影响因子: 2.8
作者:
F. Coat;C. Lapinte
通讯作者: F. Coat;C. Lapinte
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
Tania Weyland;K. Costuas;L. Toupet;J. Halet;C. Lapinte
通讯作者: C. Lapinte
低自旋d5过渡金属配合物的电子顺磁共振研究
DOI: 10.1016/0010-8545(94)80069-3
发表时间: 1994
影响因子: 20.6
作者:
P. Rieger
通讯作者: P. Rieger
氰化桥联铁(II)-M(II)分子方,M(II)=Fe(II),Co(II),Cu(II)"氰化物
DOI: --
发表时间: 2004
期刊: Inorganic Syntheses 34
影响因子: --
作者:
大塩寛紀;金子正夫;大塩 寛紀
通讯作者: 大塩 寛紀
DOI: 10.1063/1.354535
发表时间: 1993-09
影响因子: 3.2
作者:
P. Tougaw;C. Lent;W. Porod
通讯作者: P. Tougaw;C. Lent;W. Porod