ИСТИНА

A metallocene catalytic compound represented by the formula: ** Formula ** where each R3 is hydrogen; each R4 is independently a C1-C10 alkyl or cycloalkyl; each R2 and R7 is independently hydrogen, or C1-C10 alkyl or cycloalkyl, each R5 and R6 is independently hydrogen, substituted or unsubstituted C1-C50 hydrocarbyl, or substituted or unsubstituted C1-C50 halocarbyl; and R4 and R5, R5 and R6 and / or R6 and R7 may optionally be bonded together to form a ring structure; J is a bridging group represented by the formula Ra 2J, where J is C or Si, and each Ra is independently C1-C20 substituted or unsubstituted hydrocarbyl, and the two Ra form a cyclic structure incorporating J and the cyclic structure can be a saturated or partially saturated cyclic or condensed ring system; and each X is a univalent anionic ligand, or two Xs are attached and linked to the metal atom to form a metallocycle ring, or two Xs are attached to form a chelating ligand, a diene ligand, or an alkylidene ligand.