2,3,5-trimethyl-pyridine; iron(III) chloride in toluene; acetonitrile byproducts: C20H8(C6H5)4N3N(C6H5); a soln. of FeCl3 in CH3CN was added to a soln. of Fe-complex in tolueneat -20°C, warmed to 20°C, an excess of FeCl3 and collidine were added;

in 1,2,5-trimethyl-benzene Kinetics; 125°C; not isolated, reaction followed by UV/VIS spectroscopy;