| 175729-11-0

• CAS: 175729-11-0
• 化学式: C₂₂H₂₀B₂FeN₈
• 分子量: 473.923
• InChiKey: WKCGHPNVWCNJJI-UHFFFAOYSA-N

反应信息

• 作为反应物：
  描述：

  、 trimethoxonium tetrafluoroborate 以 二氯甲烷 为溶剂， 以76%的产率得到
  参考文献：
  名称：

  Structural Features and Electrochemical Properties of ansa-Ferrocenes with Pyrazabole Bridges

  摘要：

  The stability of ferrocenophanes ansa-1,1'-Fc[B(R)(mu-pzR(#))](2) (2) with pyrazabole bridges depends to a large extent on the substitution pattern of boron (R) and pyrazole (R(#)). Cyclic voltammetry measurments on 17 derivatives of 2, with R and R(#) covering a wide spectrum of electronic features, revealed a pronounced influence of these substituents on the E(0/+)(o)' values of the Fe(II)/Fe(III) redox couple, The electronic effects of R and R(#) thus appear to be transmitted to a great degree along the pyrazabole framework. pi donors R and electron accepters R(#) lead to a gradual ansa-bridge weakening and finally opening, if R=pyrrolidinyl and R(#)=3,5-CF3 or 3,4,5-COOEt (NMR spectroscopy; X-ray crystal structure analyses of 2c (R=Me; R(#)=3,4,5-H), 2d (R=Me; pzR(#)=indazolyl), 2n (R=pyrrolidinyl; R(#)=3,4,5-H), 2p (R=pyrrolidinyl; pzR(#)=triazolyl)). Cyclic voltammetry indicates ansa-bridge opening to occur without major alterations of the charge density at boron. In the case of R=pyrrolidinyl there is evidence for negative hyperconjugation into the highly polar B-N(pyrazole) bonds. Oxidation of the central iron atom results in a contraction of the pyrazabole dimer (X-ray crystal structure analysis of 2c(+)).

  DOI：

  10.1021/om960722s
• 作为产物：
  描述：

  在 (Me₃O)BF₄ 作用下， 以 二氯甲烷 为溶剂， 生成
  参考文献：
  名称：

  De Biani, Fabrizia Fabrizi; Jaekle, Frieder; Spiegier, Michael, Inorganic Chemistry, 1997, vol. 36, # 10, p. 2103 - 2111

  摘要：

  DOI：

文献信息

• Novel Ferrocene‐Based Mono‐ and Bifunctional Tri‐1‐pyrazolylborate Ligands
  作者：Frieder Jäkle、Kurt Polborn、Matthias Wagner

  DOI：10.1002/cber.19961290603

  日期：1996.6

  (dibromoboryl)ferrocene (1a) with pyrazole/NEt3 gave the ferrocenyltri-1-pyrazolylborate ligand 2. Its thallium(I) derivative 2-Tl provides the first example of a polymeric structure with bridging tri-1-pyrazolylborate units in the solid state. The trinuclear iron complex 2-Fe, which is related to 1,1′-terferrocene, was obtained by reaction of 2 with FeCl2. The bis(polydentate) ligand 1,1′-ferrocened

  （二溴硼基）二茂铁（1a）与吡唑/ NEt 3的反应得到二茂铁基三-1-吡唑基硼酸酯配体2。它的（（I）衍生物2-T1提供了固态桥连的3--1-吡唑基硼酸酯单元的聚合物结构的第一个例子。通过2与FeCl 2的反应获得与1,1'-三茂铁有关的三核铁络合物2-Fe。双（多齿）配体1,1'-二茂铁基-双（tri-1-pyrazolylborate）（3-Li）由1,1'-双-[双（二甲基氨基）硼基]二茂铁（1c）和混合物制得回流甲苯/ THF中制备吡唑内酯锂/吡唑锂 3锂与TlNO 3反应，得到complex（I）络合物3-T1。
• Synthesis, Structure, and Dynamic Behavior of <i>ansa</i>-Ferrocenes with Pyrazabole Bridges
  作者：Frieder Jäkle、Thomas Priermeier、Matthias Wagner

  DOI：10.1021/om9509305

  日期：1996.4.16

  the ferrocene core. Most substituents at boron or pyrazole lead to an ansa-ferrocene structure. However, the presence of both strong electron donors (i.e. pyrrolidine) at boron and strongly electron-withdrawing pyrazole substituents (i.e. ester groups) results in an open chain structure 2i with three-coordinate boron atoms. The tetravalent boron centers in ansa-1,1‘-Fc[B(Br)(μ-pz)]2, 2a, show an unusually

  各种立体刚性柄-ferrocenes 2与ö桥已经通过1,1'- diborylferrocenes（1,1'-的Fc（BBRR）的反应获得的亚苯基型2 ; FC =二茂铁; R = CH 3，溴，OEt，NC 4 H 8）与选定的吡唑衍生物。随后的分子内BN加合物的形成建立了环间桥。合成方法是基于通过等电子，自组装，固定的硼氮键取代某些关键的碳-碳键，因此遵循非共价合成的原理。吡唑硼酸酯桥似乎不会引起二茂铁芯的任何明显变形。大多数取代的硼或吡唑导致袢二茂铁结构。然而，在硼处同时存在强电子给体（即吡咯烷）和强吸电子吡唑取代基（即酯基）都会导致具有三配位硼原子的开链结构2i。四价硼中心在安莎-1,1'--Fc的[B（BR）（μ-PZ）] 2，图2a，示出了异常高的倾向经历亲核取代反应，即使它们位于桥头位置。NMR光谱学以及化学证据都反对在这些反应过程中未桥连的开链中间体。