| 184954-24-3

• CAS: 184954-24-3
• 化学式: C₁₈H₂₂B₂FeN₆O₂
• 分子量: 431.881
• InChiKey: UXRRUZRGCYQYLB-UHFFFAOYSA-N

反应信息

• 作为反应物：
  描述：

  、 trimethoxonium tetrafluoroborate 以 二氯甲烷 为溶剂， 生成
  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：

  1H-1,2,4-三唑 、 1,1'-bis(dibromoboryl)ferrocene 在 Et₂O 、 NEt₃ 作用下， 以 乙醚 、 甲苯 为溶剂， 以45%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