Abstract

AbstractCobalt(II) iodide, bromide, and chloride react with 1 equiv. of IPr [1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene] to form a series of tetrahedral dimeric (30e) complexes of cobalt(II) in good yields. These were transformed into the monomeric forms in the presence of pyridine. These complexes were characterized by SQUID, XPS, UV/Vis spectroscopy, elemental analysis, and X‐ray crystallography, and were found to have high catalytic activity for Kumada–Tamao–Corriu cross‐coupling reactions of aryl halides.

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