The present invention relates to tridentate ligands and the relative complexes
of these ligands with transition metals. The ligands and their complexes are useful
in the oligomerization and/or polymerization of ethylene and -olefins. The
ligands are represented by formula (I)
##STR1##
wherein R1 is ethyl, R2, R3, R4,
R5 and R6, are independently selected from the group consisting
of hydrogen, halogen, C1-C10 alkyl, C6-C15
aryl, and halogenated C6-C15 aryl; R7 is
selected from the group consisting of H, C1-C10 alkyl, and
C6-C15 aryl; and R8 is selected from the group
consisting of phenyl, alkyl substituted phenyl, C1-C10 alkyl
and C6-C15 aryl.
