Bridged metallocene complexes, process for preparing the...

Details Bridged metallocene complexes, process for preparing the... Bridged metallocene complexes, process for preparing the...

2007-06-19

2007-06-19

Lu, Caixia (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S170000, C556S007000, C556S008000, C556S053000, C568S003000, C502S152000, C502S158000, C502S202000

Reexamination Certificate

active

11083498

ABSTRACT:
Provided is a bridged cyclopentadienyl-dicarbollide complex having the formula of {L[(Cp)(C2B9R110)]}MR in which Cp is an unsubstituted, alkyl-substituted, aryl-substituted or fused ring cyclopentadienyl, R1is hydrogen, or alkyl, L is a bridging unit that bonds to both Cp ring and cage carbon atoms, R is alkyl, aryl or a derivative thereof and M is Ti, Zr or Hf. A process for preparing the complex disclosed herein is also provided.

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Hong et al. “A Neutral Group 4, Poly(methyl methacrylate) Catalyst Derived from o-Carborane”, Organometallics, vol. 17, Jul. 1998, pp. 2933-2935.
D.J. Crowther, et al., “Group 4 Metal Dicarbollide Chemistry. Synthesis, Structure, and Reactivity of Electrophilic Alkyl Complexes (Cp*)(C2B9H11)M(R) (M=Hf, Zr),”J. Am. Chem. Soc.1991, 113, 1455-1457.
J.A. Gladysz, Guest Editor, Special Issue for “Frontiers in Metal-Catalyzed Polymerization: Designer Metallocenes, Designs on New Monomers, Demystifying MAO, Metathesis Déshabillé,”Chemical Reviews, vol. 100, No. 4, Apr. 2000, pp. 1167-1168, and pp. 1-3 of Table of Contents.
W. Kaminsky, et al., “Metallocenes for Polymer Catalysis,”Adv. Polym. Sci., 1997, 127, 142-187.

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