| 摘要 |
New metallocenes with special substituents on the cyclopentadienyl and/or indenyl ring systems, e.g. triorganosilyl substituents or 1-30C groups which can form e.g. azapentalenes with the cyclopentadienyl ring. New metallocenes with special substituents on the cyclopentadienyl and/or indenyl ring systems, e.g. triorganosilyl substituents or 1-30C groups which can form azapentalenes, thiapentalenes or phosphapentalenes with the cyclopentadienyl ring. Compounds of formula (I) are new; M<1> = a Sub-Group III, IV, V or VI metal; R<7> = H, Si(R<12>)3 or a 1-30C group, or two or more groups R<7> plus the linking atoms may form an optionally substituted 4-24C ring system; R<12> = H or a 1-40C group; R<8> = H, Si(R<12>)3 or a 1-30C group which may also combine with the cyclopentadienyl (Cp) ring to form azapentalenes, thiapentalenes or phosphapentalenes, or two or more groups R<8> may form 4-24C ring systems as for R<7>; l, m = 5 if v = 0, or 4 if v = 1; L<1> = H, 1-10C hydrocarbyl, halogen, OR<9>, SR<9>, OSi(R<9>)3, Si(R<9>)3, P(R<9>)2, N(R<9>)2, toluenesulfonyl, trifluoroacetyl, trifluoroacetoxy, trifluoromethanesulfonyl, nonafluorobutanesulfonyl or 2,2,2-trifluoroethanesulfonyl; R<9> = halogen, optionally halogenated 1-10C alkyl, or optionally halogenated 6-20C aryl; o = 1-4; Z = a bridging unit; v = 0 or 1. Independent claims are also included for: (a) compounds of formula (IIa); (b) a catalyst system containing (I) and cocatalyst(s) and/or a support; (c) a process for the production of polyolefins by polymerisation of olefin(s) in presence of (I). R<3>, R<4>, R<6> = H or an optionally fluorinated 1-20C carbon-containing group; R<5> = H; R<20>, R<21> = H, halogen or optionally fluorinated 1-20C groups, or pairs of these groups may form a ring system; Q = 4-24C aromatic ring system or a heteroaryl group which forms aza-, thia- or phospha-pentalenes with the Cp ring; l, l' = 0-4; B = a bridging unit. Full definitions are given in the DEFINITIONS (Full Definitions) field;
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