| abstract |
The present invention relates to a compound according to formula 1: wherein:• each of R1 to R12 may individually be a moiety selected from hydrogen, an aryl moiety, an aryl moiety, a halogen, an alkyl or aryl moiety with halogen substituent(s), an alkoxy moiety, a siloxy moiety, or a nitrogen-containing moiety, wherein each R moiety may optionally form a ring structure with an adjacent R moiety; • each of A1 and A2 may individually be a moiety selected from: o an element of Group 16 of the periodic system; and o a moiety containing an element of Group 15 of the periodic system; preferably wherein A1 and A2 are selected from O or NR13, wherein R13 is an alkyl, aryl or aralkyl moiety, preferably a substituted or unsubstituted phenyl moiety, preferably a p-tolyl moiety; • T is a divalent hydrocarbyl moiety; • D is a substituted element of Group 15 or Group 16 of the periodic system, preferably an N(R14)2 or OR14 moiety, in which R14 is selected to be an alkyl moiety, an aryl moiety, or an aralkyl moiety, preferably R14 is a methyl moiety; • Y is an element selected from Group 15 of the periodic system, preferably N; • Mt is a transition metal, preferably selected from Group 3 or 4 of the periodic system, more preferably selected from Ti, Hf and Zr; • X is a sigma-bonded ligand, preferably selected from a halogen, an alkyl moiety, an aralkyl moiety, an alkoxy moiety, an aryloxy moiety, and a dialkylamine moiety; and Classification: General Business Use • n is the amount of X ligands bonded to X. Such compound allow for use in catalysts that result in high molecular weight polymers, display high catalyst activities and give excellent comonomer incorporation. |