Bis(cyclopentadienyl)hafnium dichloride, Di(cyclopentadienyl)hafnium(IV) dichloride, Hafnocene dichloride, Dichloro(dicyclopenta-1, 3-dien-1-yl)hafnium, Cp2HfCl2, (C5H5)2HfCl2, C10H10Cl2Hf