The present invention relates to a process for the oligomerisation of ethylene which comprises contacting ethylene with a transition metal-permethylpentalene complex, and a transition metal compound utilized therein.

The present invention relates to a process for the oligomerisation of ethylene which comprises contacting ethylene with a transition metal-permethylpentalene complex, and a transition metal compound utilized therein.

Provided are a catalyst composition and a method of oligomerizing olefins using the same. When the catalyst composition according to the present invention is used, oligomerization and copolymerization of olefin monomers may be performed in a single reactor at the same time with high efficiency without a separate process of preparing alpha-olefin. Therefore, costs for preparing or purchasing comonomers which are expensive raw materials may be reduced, thereby reducing the production cost of a final product. Contents of SCB (short chain branch) and LCB (long chain branch) in the polyolefin may be increased without separate feeding of comonomers, thereby producing high-quality linear low-density polyethylene.

Metallic complexes having indenyl ligands can be used as an ingredient of a catalyst system. The catalyst system can be used in polymerizations of ethylenically unsaturated hydrocarbon monomers that include both olefins and polyenes. Embodiments of the catalyst system can provide interpolymers that include polyene mer and from 40 to 75 mole percent ethylene mer, with a plurality of the ethylene mer being randomly distributed. The catalyst system also can be used in solution polymerizations conducted in C.sub.5-C.sub.12 alkanes, yielding interpolymers that include at least 10 mole percent ethylene mer.

Disclosed are methods for polymerizing olefin monomers comprising contacting one or more olefin monomers with a cosupported catalyst system and an activator. Also disclosed are polymers produced using the catalyst systems and methods disclosed herein. The polymers have a multimodal molecular weight distribution and may be produced in a single reactor.

The present invention relates to a process for the oligomerisation of ethylene which comprises contacting ethylene with a transition metal-permethylpentalene complex, and a transition metal compound utilized therein.

The present invention relates to a process for the oligomerisation of ethylene which comprises contacting ethylene with a transition metal-permethylpentalene complex, and a transition metal compound utilized therein.