Abstract
Two new triphenylphosphine-cyclopalladated ferrocenylpyrazine complexes containing chlorine/iodine anion 2–3 have been easily prepared from the bridge-splitting reaction of the palladacyclic dimer 1 and anion exchange reaction, respectively. They were characterized by elemental analysis, IR, and 1H NMR. Additionally, the structures of these two complexes were determined by single-crystal X-ray analysis and C–H···N hydrogen bonds and π–π interactions were found in the their crystal structures. These complexes displayed good activity in the coupling of terminal alkynes with arylboronic acids under atmospheric conditions. This method provided the corresponding arylalkynes with good to excellent yields.
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