Carbene transition metal catalysts

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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526160, 526161, 534 15, 502103, 502117, 556 1, 556 18, 556 22, 556 42, 556 52, 556 58, 556121, 556140, C08F 406, C08F 444, C07F 902

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060605685

ABSTRACT:
The present invention relates to novel complexes of (transition) metals containing ligands having phosphorus centers supporting a carbene structure or heteroalkane radical bonded to the (transition) metal.

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Von R. Appel und I. Ruppert, Darstellung silylierter Alkylen-bis iminophosphorane und ihre Cyclisierung mit Phosphor(V)-Fluoriden, Z. anorg. allg. Chem. 406, 131-144, (1974).
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Michael D. Fryzuk, David H. McConville nd Steven J. Rettig, Synthesis, structure and hydrogenztion of n.sup.3 -benzyl diphosphine complexes of rhodium and iridium, J. or Organ. Chem., 445 (1993) 245-256.
George J.P. Britovsek, Vernon C. Gibson, Brian S. Kimberley, Peter J. Maddox, Stuart J. McTavish, Gregory A. Solan, Andrew J.P. White and David J. Williams, Novel olefin polymerication catalysts based on iron and cobalt, Chem. Commun., 1998, 849.
U.S. application No. 09/174,782, Cavell et al., filed Oct. 19, 1998.

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