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Updated: Sep 16, 2025

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

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N2とベンゼン活性化におけるマグネシウムとマンガンのコントラスト

Siad Wolff1, Matthew J Evans2, Thayalan Rajeshkumar3

  • 1Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany.

Journal of the American Chemical Society
|July 10, 2025
PubMed
まとめ

研究者は最も長いマンガン-マンガンの結合を持つマンガン複合体を作り,希少な窒素 (N2) アクティベーションを達成しました. このマンガン複合体は,マグネシウムの類似体とは異なり,ベンゼンとのユニークな反応性を示した.

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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers07:14

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meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H01:13

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All meta-directing substituents are deactivating groups. These substituents withdraw electrons from the aromatic ring, making the ring less reactive toward electrophilic substitution. For example, the nitration of nitrobenzene is 100,000 times slower than that of benzene because of the deactivating effect of the nitro group. The first step in an electrophilic aromatic substitution is the addition of an electrophile to form a resonance-stabilized carbocation. The energy diagrams for...
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