| abstract |
The present invention provides a mixed heteroatom ligand for oligomerization of an olefin catalyst wherein the ligand comprises at least 3 heteroatoms, wherein at least one heteroatom is sulfur and at least 2 heteroatoms are not the same. provide. The present invention also provides multidentate mixed heteroatom ligands for oligomerization of olefin catalysts wherein the ligand comprises at least 3 heteroatoms, at least one of which is a sulfur atom. In addition to sulfur, the ligand may contain at least one nitrogen or phosphorus heteroatom. |