| 摘要 |
<p>Novel compounds are disclosed comprising the skeletal unit depicted in Formula (I) <CHEM> wherein O is oxygen, N is nitrogen, Q represents a divalent organic group or a group based on a Group 14 atom; R<1> is hydrogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; M is scandium yttrium, or a Group IV or Group V metal or a lanthanide or actinide; T is the oxidation state of M and is II or greater; X represents a monodentate atom or group covalently or ionically bonded to M; L is a mono- or bidentate molecule datively bound to M, and n is from 0 to 5. These compounds may be used as polymerisation catalysts for 1-olefins.</p> |
