1, 2-Di-(y-pyridy1)-ethane and its methiodide are readily oxidized to the corresponding ethylene derivatives. The two base3 form mixed crystals, as do their salts. The ethylene absorbs strongly at 295 mp, where stilbene has its absorption. A pronounced hathochromic shift occurs on methiodation; the bismethiodide of the ethylene absorbs at 315 mp, approximately where diphenylbutadiene absorbs. Both methiodides show a much ...
