Synonyms: 1,3-Cyclopentadiene,1,2,3,4,5-pentamethyl-, zirconium complex; (1,2,3,4,5-Pentamethylcyclopentadienyl)zirconiumtrichloride; (h5-Pentamethylcyclopentadienyl)trichlorozirconium;Pentamethylcyclopentadienyl zirconium trichloride;Trichloro(pentamethylcyclopentadienyl)zirconium; Trichloro(h5-pentamethylcyclopentadienyl)zirconium