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Front Cover: Activation of Allenes by Diferrocenylphosphenium Ion: Isolation of a Wheland Intermediate of Ferrocene (ChemistryEurope 5/2025)
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Front Cover: Activation of Allenes by Diferrocenylphosphenium Ion: Isolation of a Wheland Intermediate of Ferrocene (ChemistryEurope 5/2025)
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Front Cover: Activation of Allenes by Diferrocenylphosphenium Ion: Isolation of a Wheland Intermediate of Ferrocene (ChemistryEurope 5/2025)
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Journal Article
Front Cover: Activation of Allenes by Diferrocenylphosphenium Ion: Isolation of a Wheland Intermediate of Ferrocene (ChemistryEurope 5/2025)
2025
Overview
The Front Cover shows a round‐bottomed flask containing a burgundy solution of diferrocenylphosphenium ion [Fc2P][B(C6F5)4], which was used in this work to activate various allenes. Dropwise addition to 2‐(trimethylsilyl) penta‐2,3‐diene yields a bright red solution of a stable Wheland intermediate of ferrocene, whose solid‐state structure is depicted as a ball‐and‐stick model. In front lies Saint Peter’s Key, a prominent feature of the City of Bremen’s coat of arms, representing the unlocked potential of highly reactive main group species. More information can be found in the Research Article by E. Hupf, J. Beckmann and co‐workers (DOI: 10.1002/ceur.202500031).
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