The invention relates to a process for the functionalization of a substituted cyclopentadiene. The invention is characterized in that the substituted cyclopentadiene is reacted with a Brönsted base, after which the anion obtained is reacted with a dihaloalkylsilicon compound. The invention also relates to silicon-functional cyclopentadienes and to transition metal complexes of a transition metal and one or more ligands on the basis of silicon-functional cyclopentadienes.
