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
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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
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发表时间:
2013
期刊:
影响因子:
2.8
通讯作者:
Burgun A
中科院分区:
文献类型:
--
作者:
Burgun A
The bimetallic ruthenium complex {Cp(dppe)Ru}2(μ-CCCCCC) (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.
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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
影响因子:
20.6
作者:
P. Rieger
通讯作者:
P. Rieger
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
影响因子:
3.2
作者:
P. Tougaw;C. Lent;W. Porod
通讯作者:
P. Tougaw;C. Lent;W. Porod