| 主权项 |
1. A catalyst compound represented by the formula: wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; M is a Group 3, 4, 5 or 6 transition metal; N1, N2, N3 and N4 are nitrogen; each of X1 and X2 is, independently, a univalent C1 to C20 hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X1 and X2 join together to form a C4 to C62 cyclic or polycyclic ring structure, provided however when M is trivalent X2 is not present; Y is a divalent hydrocarbyl radical covalently bonded to and bridging between both of the nitrogen atoms N1 and N2; and each R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, and R32 is, independently, a hydrogen, a C1-C40 hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R1 to R32 may independently join together to form a C4 to C62 cyclic or polycyclic ring structure wherein neither R6 nor R29 join together with R13 or R30 to form direct covalent bonds between the respective aromatic rings and wherein neither R26 nor R31 join together with R19 or R32 to form direct covalent bonds between the respective aromatic, or a combination thereof. |
