1,2-(η3-C5H5)2W2(NMe2)4 | 123454-19-3

• 英文名称: 1,2-(η3-C5H5)2W2(NMe2)4
• 英文别名: 1,2-W2(eta.3-Cp)2(NMe2)4]
• CAS: 123454-19-3
• 化学式: C₁₈H₃₄N₄W₂
• 分子量: 674.195
• InChiKey: KGHPJSSONMGNMD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为反应物：
  描述：

  1,2-(η3-C5H5)2W2(NMe2)4 、 W2(cyclooctatetraene)(NMe2)4 以 neat (no solvent) 为溶剂， 以66%的产率得到anti-1,2-W2(S-t-Bu)2(NMe2)4
  参考文献：
  名称：

  Unexpected formation of anti-1,2-W2(SBut)2(NMe2)4 in the thiolysis of gauche-1,2-W2Cp2(NMe2)4 and W2COT(NMe2)4 with ButSH

  摘要：

  Thiolysis of W2Cp2(NMe2)(4) and W2COT(NMe2)(4) with excess Bu'SH leads to cleavage of the respective carbocyclic rings from the ditungsten center and formation of the compound anti-1,2-W-2(SBut)(2)(NMe2)(4) which was characterized via a single-crystal X-ray diffraction study. This product was found to be isostructural with its dimolybdenum analogue. The compound is a prototypical ethane-like dimer having a W equivalent to W bond distance of 2.3011(3) angstrom and thiolate ligands in an anti configuration about the W equivalent to W bond. The thiolysis reactions for both dimethylamide precursors are contrasted with the results of their respective alcoholysis reactions. (c) 2005 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jorganchem.2005.08.046

文献信息

• Alcoholysis of gauche-1,2-(η3-Cp)2W2(NMe2)4: Structural evidence for WW bond cleavage and proton transfer to bound cyclopentadiene
  作者：Malcolm H. Chisholm、Judith C. Gallucci、Carl B. Hollandsworth

  DOI：10.1016/j.inoche.2006.04.035

  日期：2006.10

  1,2-Cp2W2(NMe2)(4) undergoes W=W bond scission in the presence of excess aliphatic alcohols ROH where R = Me, Et, Pr-n giving yellow, crystalline Cp2WH2 and presumably W(OR)(6). In reactions with excess CF3CH2OH, two crystalline products are obtained from the pentane wash of the crude product. The first product is formulated as 1,1-W-2(eta(5)-Cp)(eta(3)-C5H7)(mu-OCH2CF3)(2)(OCH2CF3)(4), (W-W, 2.705(1) angstrom avg. for two independent molecules) wherein six equivalents of CF3CH2OH have reacted with the amide precursor. The unusual eta(3)-C5H7 ligand present in this compound arises from the transfer of two protons to one of the Cp rings. The second product is formulated as the complex salt [W(OCH2CF3)(6)] [H2NMe2][Cp2W(H)(x)(OCH2CF3)] wherein a H2NMe2 cation bridges the neutral W(OR)(6) moiety and the Cp2W(H)(x)(OCH2CF3) (x = 1 or 2) anion through hydrogen bonding. The formation of the alcoholysis products suggests the importance of oxidative addition in the mechanism of alcoholysis of ditungsten dimethylamides. (C) 2006 Elsevier B.V. All rights reserved.