The invention relates to a metallocene complex according to formula (I), (I) wherein R.sub.1 and R.sub.2 are independently selected from H, an alkyl or an aryl group, wherein R.sub.3 is a C1-C10 alkyl group, wherein R′ is selected from H, an alkyl group, an aryl group and wherein different R′ substituents can be connected to form a ring structure and wherein B is a 1,2 phenylene bridging moiety, which can be optionally substituted, wherein Mt is selected from Ti, Zr and Hf, X is an anionic ligand, z is the number of X groups and equals the valence of Mt minus 2. The invention also relates to a catalyst comprising the reaction product of the metallocene complex and a cocatalyst. Further the invention relates to a (co)polymerisation process of olefinic monomers.

##STR00001##

An organic electroluminescence device of the present embodiments includes oppositely disposed first electrode and second electrode, and a plurality of organic layers disposed between the first electrode and the second electrode, wherein at least one among the plurality of organic layers includes a fused polycyclic compound represented by Formula 1 below, thereby showing improved emission efficiency: ##STR00001##

The present invention provides a transition metal compound, a catalyst composition comprising same, and a method for producing an olefin polymer using the catalyst composition. A transition metal compound having a specific functional group at a specific position, according to the present invention, has high solubility and catalytic activity, and thus a method for producing an olefin polymer by using said transition metal compound can produce an olefin polymer having excellent physical properties through a simple process.

Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: ##STR00001##
where each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and X are as discussed herein.

Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: ##STR00001##
where each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and X are as discussed herein.

Molybdenum(0) coordination complexes comprising at least one cycloheptatriene ligand and optionally one or more neutral ligands which coordinate to the metal center by carbon, nitrogen or phosphorous are described. Methods for depositing molybdenum-containing films on a substrate are described. The substrate is exposed to a molybdenum precursor and a reactant to form the molybdenum-containing film (e.g., elemental molybdenum, molybdenum oxide, molybdenum carbide, molybdenum silicide, molybdenum nitride). The exposures can be sequential or simultaneous.

A group 5 metal compound according to an embodiment of the present disclosure is represented by any one of the following <Chemical Formula 1> and <Chemical Formula 2>: ##STR00001## In <Chemical Formula 1> and <Chemical Formula 2>, M is any one selected from group 5 metal elements, n is any one selected from an integer of 1 to 5, R.sub.1 is any one selected from a linear alkyl group having 3 to 6 carbon atoms and a branched alkyl group having 3 to 6 carbon atoms, and R.sub.2 and R.sub.3 are each independently any one selected from hydrogen, a linear alkyl group having 1 to 4 carbon atoms, and a branched alkyl group having 1 to 4 carbon atoms.

This invention relates homogeneous (typically solution) polymerization of propylene and optional olefin comonomer using metallocene catalyst compounds having a 1,5,6,7-tetrahydro-s-indacenyl moiety bridged to another indacenyl moiety or bridged to a substituted or unsubstituted indenyl moiety.

This invention relates homogeneous (typically solution) polymerization of propylene and optional olefin comonomer using metallocene catalyst compounds having a 1,5,6,7-tetrahydro-s-indacenyl moiety bridged to another indacenyl moiety or bridged to a substituted or unsubstituted indenyl moiety.

Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising

(i) a metallocene complex of formula (I)

##STR00001## M is Hf or a mixture with Zr, provided that more than 50% by moles of the complex of Formula I has M=Hf X is a sigma ligand R are the same or different from each other and can be saturated linear or branched C.sub.1-C.sub.10 alkyl, C.sub.5-C.sub.10 aryl, C.sub.6-C.sub.20 alkylaryl or C.sub.6-C.sub.20 arylalkyl groups, which can optionally contain up to 2 heteroatoms or silicon atoms R.sup.1 is a C.sub.6-C.sub.20-aryl, which can be unsubstituted or substituted by one or up to 5 linear or branched C.sub.1-C.sub.10 alkyl group(s) R.sup.2 is a saturated linear or cyclic C.sub.3-C.sub.20 alkyl group or a branched CR.sup.3R.sup.4R.sup.5 group, wherein R.sup.3 is hydrogen or an C.sub.1-C.sub.20 alkyl group and R.sup.4 and R.sup.5 are the same or are different and can be an C.sub.1-C.sub.20 alkyl group and (ii) a boron containing cocatalyst.