Synonyms: 1,3-Cyclopentadiene,1,2,3,4,5-pentamethyl-, ruthenium complex; Bis(dichloro(h5-pentamethylcyclopentadienyl)ruthenium);Bis(pentamethylcyclopentadienyl)tetrachlorodiruthenium; Di-m-chlorodichlorobis(pentamethylcyclopentadienyl)diruthenium;Dichloro(pentamethylcyclopentadienyl)ruthenium dimer; Pentamethylcyclopentadienerutheniumdichloride dimer