Patent ID: 7538239

Claim:
A transition metal complex of Formula 1: where R1 and R2 are each independently a hydrogen atom; a C1-C20 alkyl, aryl, or silyl radical; a C1-C20 alkenyl, alkylaryl, or arylalkyl radical; or a metalloid radical of Group 14 metal substituted with hydrocarbyl, wherein R1 and R2 can be connected by an alkylidene radical that contains a C1-C20 alkyl or aryl radical to form a ring; R4 is each independently a hydrogen atom; a halogen radical; or a C1-C20 alkyl or aryl radical, wherein two R4 can be connected to form a fused ring structure; R3 is a C1-C20 alkyl sulfonyl, aryl sulfonyl, or silyl sulfonyl radical; a C1-C20 alkyl carbonyl, aryl carbonyl, or silyl carbonyl radical; C1-C20 alkyl carboxy, or aryl carboxy radical; or C1-C20 alkyl phosphonyl, or aryl phosphonyl radical; M is a transition metal of Group 4; and Q1 and Q2 are each independently a halogen radical; a C1-C20 alkyl or aryl amido radical; a C1-C20 alkyl, alkenyl, aryl, alkylaryl, or arylalkyl radical; or a C2-C20 alkylidene radical.