Abstract: This invention describes a novel method of preparing metallocene compounds. The invention is based on synthesis of novel bis cyclopentadienides that, under appropriate conditions, will either encapsulate a transition metal to produce a metallocene such as ferrocene, or ferrocene derivative, or will yield a polymeric metallocene. Compounds produced by this process are useful as catalysts in propulsion systems, or as anti-knock compounds in gasolines.

Abstract: Metallocene polymers characterized as being in a stacked configuration where the monomeric units are constrained to interact with one another across their cofacial cyclopentadienyl ring surfaces, and having the general structure ##STR1## where M represents the metal and n is an integer of 2 or greater. The preparative method involves the coupling reaction between a zincated metallocene and a dihalogen-substituted aromatic, in the presence of a catalyst. The mixture is refluxed, and the resultant polymer is taken up in organic solvent, washed, dried, separated and purified.

Abstract: This invention describes a novel method of preparing metallocene compounds. The invention is based on synthesis of novel bis cyclopentadienides that, under appropriate conditions, will either encapsulate a transition metal to produce a metallocene such as ferrocene, or ferrocene derivative, or will yield a polymeric metallocene. Compounds produced by this process are useful as catalyst in propulsion systems, or as anti-knock compounds in gasolines.