Metallocenes with partially hydrogenated pi-ligands

摘要

Metallocenes of formula (I) are claimed, in which M<1> = a Group IVb, Vb or VIb metal; R<2>, R<2> = H, 1-40C hydrocarbon group such as 1-10C alkyl or alkoxy, 2-10C alkenyl, 6-10C aryl or aryloxy, 7-40C aralkyl or alkaryl, or 8-40C aralkenyl, OH or halogen; R<3>, R<4> = H, halogen, 1-20C hydrocarbon group such as 1-10C alkyl, 2-10C alkenyl or 6-10C aryl, or N(R<16>)2, SR<16>, OSi(R<16>)3, Si(R<16>)3 or P(R<16>)2 (with R<16> = halogen, 1-10C alkyl or 6-10C aryl); R<13> = a bridging group such as -A-, -A-A-, -Q-Q-, -O-A-O-, -Q-, -O-A-, -Q-A-, -Q-Q-Q-, =BR<14>, =AlR<14>, -Ge-, -O-, -S-, =SO, =SO2, =NR<14>, =CO, =PR<14> or =P(O)R<14>; A = -M<2>R<14>R<15>-; Q = -CR<14>R<15>-; R<14>, R<15> = H, halogen, or a 1-40C carbon-containing group such as SiR3, NR2 or BR2 (with R = 1-10C alkyl or 6-20C aryl), 1-10C alkyl, fluoroalkyl or alkoxy, 6-20C aryl of fluoroaryl, 2-10C alkenyl, 7-40C aralkyl or alkaryl, or 8-40C aralkenyl, or R<14> + R<15> may form a ring with the linking atoms; M<2> = Si , Ge or Sn; z = 0 or 1; Rx, Ry = -(CR<5>2)l-(CR<6>=CR<6>)m-(CR<7>2)n-(CR<8>=CR<8>)o-(CR<9>2)p- in which R<5>-R<9> = as for R<14> and R<15>; l + m + n + o + p = 2-6; l + n + p = at least 1; l, m, n, o, p = 0, 1, 2, 3 or 4; at least one of the indices m or o is not zero; the combination m = 0, o = 0 and l + n + p = 4, and the combination l = 0, n = 0, p = 0 and m + o = 2 are excluded. Also claimed is (i) a process for the production of (I), (ii) a catalyst containing (a) metallocene(s) (I) and (b) cocatalyst(s), and (iii) a process for the production of polyolefins in presence of these catalysts.