Patent ID: 8691710

Claim:
A metal containing complex with (1) a formula of (R 1 n Pyr) (R 2 n Pyr)ML 1 L 2 having a structure A below: wherein M is a Group IV metal selected from the group of titanium, zirconium and hafnium, Pyr is pyrrolyl ligand, R 1 and R 2 can be same or different organic groups substituted at 2,3,4,5-positions of the pyrrole ring and selected from the group consisting of linear or branched C 1-6 alkyls, and C 3-10 alkyls containing oxygen or nitrogen atoms; n is 1, 2, 3 or 4, and one of each of R 1 and R 2 can be linked together via carbon, oxygen, or nitrogen atom; and L 1 and L 2 are independently selected from the group consisting of alkoxide, amino and C 2 -C 6 alkyl, and can be linked together; or (2) a formula of [(R 8 XR 9 )(R 1 n Pyr)(R 2 n Pyr)]ML 1 L 2 having a structure B below: wherein M is a Group IV metal selected from the group of titanium, zirconium and hafnium, Pyr is pyrrolyl ligand, R 1 and R 2 can be same or different organic groups substituted at 2,3,4-positions of the pyrrole ring and selected from linear or branched C 1-6 alkyls, n =1, 2 and 3, R 8 and R 9 are independently selected from linear or branched chain alkylene group having 2-6 carbon atoms, and X is selected from the group consisting of CH 2 and oxygen, alkylamino, dialkyl silyl, and L 1 and L 2 are independently selected from the group consisting of alkoxide, amide and alkyl, and can be linked together.