New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.

 
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< Metallocenes, polymerization catalyst systems, their preparation, and use

< Adhesive alpha-olefin inter-polymers

> Composition and method for preparing novel cationic thickeners

> Alpha-olefin-aromatic vinyl copolymer

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