| 摘要 |
The prodn. of bridged, stereo-rigid metallocenes of formula (I) Q(CpRa)(Cp'R'a')M(X)n (I) comprises (1) reacting cyclopentadienyl cpds. with Mg cpds.: 2CpRa + (R<3>R<4>)cMg---> (CpRa)2Mg + cR<3>H + cR<4>H, (2) reacting the prods. with cpds. of formula X<1>QX<2>:(CpRa)2Mg + X<1>QX<2> --->(CpRa)2Q + MgX<1>X<2>, (3) reacting the prods. with Mg cpds. as above: (CpRa)2Q + (R<3>R<4>)cMg ---> Q(CpRa)2Mg + cR<3>H + cR<4>H, (4) reacting the prods. with organotin cpds.: Q(CpRa)2Mg + 2R<6>4-kSnX<3>k ---> Q(CpRa)2(SnC<3>k-1R<6>4-k)2 + MgX<3>2, (5) reacting the prods. with transition metal halides: Q(CpRa)2(SnX<3>k-1R<6>4-k)2 + MXm --- Q(CpRa)2MX2 + 3SnX<3>k-1XR<6>4-k, Cp = cyclopentadienyl, indenyl or fluorenyl, R, R' = alkyl, phosphino, amino, alkyl ether or aryl ether gp., with a = 0-4 and a' = 0-4, Cp' = one of the Cp gps. or NR" (with R" = alkyl or aryl with a = 1), Q = single- or multi-membered bridge -(ZR<1>R<2>)b- between Cp and Cp' (with R<1>, R<2> = H, 1-10C alkyl or 6-10C aryl, Z = C, Si or Ge, b = 1, 2 or 3), M = Gp. 3-6 transition metal pref. Zr or Hf, X, X<3> = halo, pref. Cl or Br, n = oxidn. no. of M minus 2, R<3>, R<4> = H or 1-12C alkyl (with c = 0 or 1), X<1>, X<2> = Cl, Br, I or -OSO3R<5> (with R<5> = 1-10C alkyl or 6-10C aryl), R<6> = 2-20C (pref. 4-8C) alkyl or 6-10C aryl, k = 1-4. m = oxidn. no. of M. Also claimed are tin cpds. of formula (II) Q(CpRa)(Cp'R'a')(SnX<3>k-1R<6>4-k)2 (II)
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