| abstract |
Formula (I): (R 1 ) 2 PP (R 1 ) m (R 2 ) n = N (R 3 ) (where R 3 is hydrogen, hydrocarbyl group, substituted hydrocarbyl group, heterohydrocarbyl group, substituted) Selected from telohydrocarbyl groups, silyl groups or derivatives thereof, the R 1 group is independently selected from an optionally substituted aromatic group having a polar substituent in at least one of the ortho positions, and the R 2 group is independently Selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl group and substituted heterohydrocarbyl group, but when the R 2 group is aromatic, it has no polar substituent at any of the ortho positions, and m is 0 or 1, n is 1 or 2, but the sum of m + n is 2); a catalyst system comprising the ligand; and simultaneous trimerization and tetramerization of olefin monomers using the ligand Law. [Selection figure] None |