ИСТИНА

A kind of asymmetric complex compound of formula (I), wherein M is zirconium or hafnium；Each X is sigma ligands；L is two valence bridge chosen from the followings：‑R'2C, R'2C‑CR'2, R'2Si, R'2Si‑SiR'2, R'2Ge, wherein each R' independently is hydrogen atom, C1 C20 alkyl, three (C1 C20 alkyl) silylation, C6 C20 aryl, C7 C20 aralkyl or C7 C20 alkaryls；R2And R2' it is each independently C1‑C20Alkyl；R5'It is C1‑20Alkyl；R5It is hydrogen or C1‑20Alkyl；R6It is non-tertiary C1‑10Alkyl or 10 aryl of C6 or 10 aralkyl of C7 or ZR3；R6'It is tertiary C4‑20Alkyl；Z is O or S；R3It is 20 alkyl of C1 being optionally optionally substituted by halogen；Ar is by one or more group R1The aryl or heteroaryl with most 20 carbon atoms optionally replaced；Ar' is by one or more group R1The aryl or heteroaryl with most 20 carbon atoms optionally replaced；Each R1It is C1‑20Alkyl or two R on adjacent carbon atom1Group can form 5 yuan or 6 yuan of condensed ring with Ar groups altogether, and the ring itself is optionally by one or more R4Group replaces；And each R4It is C1‑20Alkyl.