them). Markedly, this reactivity differs from related Fe(η5 -Cp/Cp*) compounds, for which terminal FeIII -H cations are isolable and have been structurally characterized, highlighting the effect of a benzannulated ring (indene). Overall, this study provides a structural, thermochemical, and mechanistic foundation for the characterization of indenide/indene PCET precursors and outlines a valuable approach
我们报告了S = 1/2
铁π络合物[Fe(η6-IndH)(depe)] +(Ind =
茚(C9 H7-),depe = 1,2-双(
二乙基膦基)
乙烷)的表征,这是通过从瞬态FeIII
氢化物[Fe(η3:η2-Ind)(depe)H] +中消除CH产生的。由于弱的
MH / CH键,这些物质似乎经历了质子偶联电子转移(PCET)以通过双分子
重组释放H2。从
化学计量和计算研究中获得的机械信息显示,开壳π-
芳烃配合物的BDF
EC-H值约为50 kcal mol-1,大致等于其FeIII -H前体的BDFEFe-H(它们之间的ΔG°≈0)。明显地,这种反应性与相关的Fe(η5-Cp/ Cp *)化合物不同,后者的末端FeIII -H阳离子是可分离的,并已进行了结构表征,从而突出了苯环环(
茚)的作用。