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• W1979756041 endingPage "1121" @default.
• W1979756041 startingPage "1116" @default.
• W1979756041 abstract "Treatment of hydroquinone with [Cp*Ir(solvent)3][BF4]2 (1) in acidic medium afforded the stable π-bonded complex [Cp*Ir(η6-hydroquinone)][BF4]2 (2) in 93% yield. Complex 2 can be easily deprotonated by a base to give the related [Cp*Ir(η5-semiquinone)][BF4] (3) and [Cp*Ir(η4-p-benzoquinone)] (4) compounds, identified by spectroscopic methods. Further, the X-ray molecular structure of p-benzoquinone iridium complex 4 is reported; such compounds are rare in the literature. Complex 4 reacts with an excess of HBF4·Et2O to give the starting material 2 quantitatively. Interestingly, the chemical transformations from 2 to 4 and vice versa occur with facile reversible changes of the oxidation state from Ir(III) to Ir (I). On the other hand, the oxo−dienyl iridium complex [Cp*Ir(η5-2,6-dimethoxy-C6H3O)][BF4] (5), identified by spectroscopic methods and X-ray analysis, reacts with NaOMe in methanol to give unexpectedly but reproducibly the substituted o-benzoquinone iridium compound [Cp*Ir{η4-(3-methoxy)-o-benzoquinone}] (6). The solution behavior and the reactivity of 6, as well as a rationale explaining its formation, is advanced." @default.
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• W1979756041 date "1998-02-24" @default.
• W1979756041 modified "2023-09-25" @default.
• W1979756041 title "<i>p</i>-, <i>o</i>-η⁴-Benzoquinone and the Related η⁶-Hydroquinone, η⁶-Catechol Complexes of Pentamethylcyclopentadienyliridium: Synthesis, Structures, and Reactivity" @default.
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• W1979756041 doi "https://doi.org/10.1021/om970925w" @default.
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