μ-pyrazine-bis(pentacarbonyltungsten(0)) | 70738-71-5

• 英文名称: μ-pyrazine-bis(pentacarbonyltungsten(0))
• 英文别名: [(W(CO)5)2μ-pyrazine]；(OC)5W(pyridazine)W(CO)5；(CO)5W(pyrazine)W(CO)5；(carbonyl)5W(pyrazine)W(carbonyl)5
• CAS: 70738-71-5
• 化学式: C₁₄H₄N₂O₁₀W₂
• 分子量: 727.893
• InChiKey: VXIUIRKVMKOQGM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
  None
• 可旋转键数：
  None
• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  None
• 氢给体数：
  None
• 氢受体数：
  None

反应信息

• 作为反应物：
  描述：

  吡嗪 、 μ-pyrazine-bis(pentacarbonyltungsten(0)) 以 二氯甲烷-D2 为溶剂， 生成 pentacarbonylpyrazinetungsten(0)
  参考文献：
  名称：

  A stable carbonyl–pyrazine–metal(0) complex: Synthesis and characterization of cis-tetracarbonylpyrazinetrimethylphosphitetungsten(0)

  摘要：

  Pentacarbonylpyrazinetungsten(0), (CO)(5)W(pyz), is not stable in solution in polar solvents such as acetone or dichloromethane and undergoes conversion to a bimetallic complex, (CO)(5)W(pyz)W(CO)(5) plus free pyrazine. These three species exist at equilibrium. Using the quantitative H-1 NMR spectroscopy, the equilibrium constant could be determined to be K-eq = (5.9 +/- 0.8) x 10(-2) at 25 degrees C. Introducing a second pyrazine ligand into the molecule does not stabilize the complex, as CiS-W(CO)(4)(pyz)(2) was found to be less stable than W(CO)(5)(pyz) and, therefore, could not be isolated. However, introducing trimethylphosphite as a donor ligand into the complex leads to the stabilization of the carbonyl-pyrazine-metal(0) complexes, as shown by the synthesis Of CiS-W(CO)(4)[P(OCH3)(3)](pyz). This complex could be isolated from the reaction of the photogenerated W(CO)(4)[P(OCH3)(3)](tetrahydrofuran) with trimethylphosphite upon mixing for 2 h at 10 degrees C in tetrahydrofuran and characterized by elemental analysis, IR, MS, H-1, C-13 and P-31 NMR spectroscopy. (c) 2006 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jorganchem.2006.02.005
• 作为产物：
  描述：

  pentacarbonylpyrazinetungsten(0) 以 solid 为溶剂， 生成 μ-pyrazine-bis(pentacarbonyltungsten(0))
  参考文献：
  名称：

  双核配合物[{W（CO）5}2μ-吡嗪]的制备，光谱性质和共振拉曼激发谱以及[W（CO）5哒嗪]的共振前拉曼光谱

  摘要：

  摘要通过在惰性气氛中加热单核化合物可以轻松制备双核配合物[{M（CO）5}2μ-吡嗪]（M = Cr，W）。光谱数据表明，这些配合物中的M（CO）5部分保留了C4v对称性。可以检测到两个允许的金属到吡嗪的CT跃迁，并利用共振效应进行分配。报道了[W（CO）5-哒嗪]的共振前拉曼光谱，并与W向哒嗪CT跃迁的性质有关。

  DOI：

  10.1016/s0020-1693(00)93638-7

文献信息

• Organometallic Counterparts of Push−Pull Aromatic Chromophores for Nonlinear Optics:  Push−Pull Heteronuclear Bimetallic Complexes with Pyrazine and <i>trans</i>-1,2-Bis(4-pyridyl)ethylene as Linkers
  作者：Maddalena Pizzotti、Renato Ugo、Dominique Roberto、Silvia Bruni、Piercarlo Fantucci、Cristina Rovizzi

  DOI：10.1021/om020633h

  日期：2002.12.1

  compared with the behavior of mononuclear [W(CO)5L] complexes (L = pyridine or trans-stilbazole para substituted with acceptor groups) and of classical structurally related organic push−pull aromatic chromophores. The second-order NLO response of asymmetric chromophores with BPE as linker is comparable, with the exception of the sign, to classical push−pull stilbenic compounds. However when pyrazine is the

  我们报告了吡嗪（pyz）和反式-1,2-双（4-吡啶基）乙烯（BPE）可极化的不对称异核推挽双金属配合物的合成，电子性质和二阶非线性光学（NLO）响应连接子，连接“ W（CO）5 ”片段（充当供体基团）和“ cis -Rh（CO）2 Cl”，“ cis -Re（CO）4 Cl”和BF 3片段（充当受体基团） ）。二阶NLO响应由EFISH技术（β评估VEC），具有1.907微米的非共振入射波长和由溶剂化的研究工作（β CT）。将这些结果与单核[W（CO）5 L]配合物（L =吡啶或被受体基团取代的反式-stilbazole对位）和经典结构相关的有机推挽芳族发色团的行为进行了比较。以BPE为连接基的不对称生色团的二阶NLO响应，除正负号外，与经典推挽式斯蒂芬苯类化合物相当。但是，当吡嗪为连接基时，其响应可能比相关的推挽式苯并发色团更高（以BF 3为受体基团）或更高的符号（“顺式-Rh（CO）2
• Zulu, Mthembeni M.; Lees, Alistair J., Inorganic Chemistry, 1988, vol. 27, # 7, p. 1139 - 1145
  作者：Zulu, Mthembeni M.、Lees, Alistair J.

  DOI：——

  日期：——
• Kaim, W.; Kohlmann, S.; Lees, A. J., Zeitschrift fur Anorganische und Allgemeine Chemie
  作者：Kaim, W.、Kohlmann, S.、Lees, A. J.、Zulu, M.

  DOI：——

  日期：——
• Lees, Alistair J.; Fobare, Joanne M.; Mattimore, Eileen F., Inorganic Chemistry, 1984, vol. 23, # 17, p. 2709 - 2713
  作者：Lees, Alistair J.、Fobare, Joanne M.、Mattimore, Eileen F.

  DOI：——

  日期：——
• Emission and photochemistry of the lowest-energy excited states of binuclear group 6B metal carbonyl complexes
  作者：Samuel Chun、David C. Palmer、Eileen F. Mattimore、Alistair J. Lees

  DOI：10.1016/s0020-1693(00)82586-4

  日期：1983.1