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This study introduces an iron complex (1) that efficiently activates Ar-H bonds using alkali bases. The alkali cation

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Area of Science:

  • Organometallic Chemistry
  • Catalysis

Background:

  • Iron complexes are versatile catalysts.
  • Activation of inert bonds like Ar-H is crucial in organic synthesis.

Purpose of the Study:

  • To explore the activation of Ar-H bonds using a ferrous complex FeIICl2(dmpe)2 (1) and alkali bases M(hmds).
  • To investigate the influence of alkali cations (Li, Na, K) on the reaction mechanism.
  • To discuss potential catalytic applications.

Main Methods:

  • Reaction of ferrous complex 1 with alkali bases M(hmds).
  • Analysis of reaction products to determine mechanistic pathways.
  • Exploration of catalytic applications based on observed reactivity.

Main Results:

  • Two distinct mechanisms for Ar-H bond activation were observed: deprotonative ferration and oxidative addition.
  • The nature of the alkali cation (MI) dictates the preferred reaction pathway.
  • The iron precursor 1 can be utilized for diverse catalytic transformations by modulating the alkali cation.

Conclusions:

  • The ferrous complex 1 serves as an effective platform for Ar-H bond activation.
  • Modulating the alkali cation offers control over reaction mechanisms and enables diverse catalytic strategies.
  • This work opens avenues for developing new catalytic processes using arenes as pro-nucleophiles, reductive dehydrocoupling, and B-H bond deuteration.