The Aerial Oxidation of a Cobalt(II)-2-Aminomethylpyridine Complex: An Improved Method for Synthesis of 2,3,5,6-(Tetrapyridin-2-yl)pyrazine

An excellent tridentate chelate compound for iron(II) ion, 2,3,5,6-(tetrapyridin-2-yl) pyrazine (2), was directly synthesized by aerial oxidation of a cobalt(II)-2-aminomethylpyridine complex. Oxidation pathways are also proposed.