Abstract: Bisimine compounds of the formula (I) where the symbols are defined in the specification are used to prepare bisimidinato complexes which can be used in the polymerization of unsaturated compounds.

Abstract: An organometallic compound of the formula I where M1 is selected from among Fe, Ru and Os and M2 is selected from among the transition metals of groups IV to VI of the Periodic Table, which can be prepared by reacting an organometallic compound of the formula II with a transition metal compound of the formula III, M2L1L2(L3)x+1  III where the variables are as defined above and the organometallic compound of the formula II can, if desired, be doubly deproteinated beforehand, can be used as part of a catalyst system for the polymerization or copolymerization of olefins. This catalyst system comprises one or more organometallic compounds of the formula I and at least one activator.

Abstract: Complexes of the formulae I a and I b 1

Abstract: Complexes of the formulae I a to d, 1

Abstract: The invention relates to coordination compounds of the general formulae (1a) to (1b), wherein M=Ti, Zr, Hf, V, Nb or Ta. The invention also relates to a method for producing the metal complexes and to the use of the complexes so obtained for the polymerization and copolymerization of olefins. For example in suspension polymerization methods, gas phase polymerization methods and bulk polymerization methods.

Abstract: The invention relates to complex compounds of general formula (I), wherein M is an element of the groups 6 to 10 of the periodic system of the elements, preferably Ni. The invention also relates to a method for producing said complex compounds and to their use for polymerising and copolymerising olefins, for example in suspension polymerisation methods, gas phase polymerisation methods, mass polymerisation methods or emulsion polymerisation methods.

Abstract: Complexes of the formulae Ia and Ib 1

Abstract: Complexes of the formula I 1

Abstract: A process for preparing 1,2-diimine compounds of the formula I where R1 and R2 are, independently of one another, alkyl, aryl or metallocenyl radicals, and R3, R4 are, independently of one another, H, alkyl or aryl radicals or R3 and R4 are joined so as to form, with inclusion of the two imine carbon atoms, a 5- to 8-membered ring which may be saturated or unsaturated and may be unsubstituted or substituted by any hydrocarbon radicals. The process involves reacting 1,2-dicarbonyl compounds with primary amines, which have been activated with trialkylaluminum compounds prior to the reaction with the 1,2-dicarbonyl compounds. 1,2-Diimine compounds of the formula I in which R1 and R2 are, independently of one another, metallocenyl radicals can be used to prepare metal complexes which can be used as catalysts in a process for the polymerization of unsaturated compounds.

Abstract: An organometallic compound of the formula I 1

Abstract: The invention pertains to metallocenes of formula (I), wherein M is a metal group of the group of Ti, Zr, Hf, V, Nb and Ta or an element from the group of lanthanides; X.sub.1 and X.sub.2 stand for an alkyl, alkoxy, aryl, aryloxy, alkenyl, arylalkyl, alkylaryl or arylalkenyl group, hydrogen or halogen; L.sub.1 and L.sub.2 stand for a hydrocarbon which can form a sandwich structure with M; R stands for C, Si, Ge or Sn; and A and B stand for a trimethylsilyl radical, B optionally for an alkyl or aryl radical.