Patent ID: 6538115
Filing Date: 2003-03-25
Classification: C07F

Abstract:
A complex having the formula: wherein M is a metal atom selected from the group consisting of transition metal, lanthanides and group 11 and 12 post transition metals; R1, R2, R3 and R4 are independently selected from the group consisting of a hydrogen atom, C1-10 straight chained, branched or cyclic alkyl radicals which are unsubstituted or substituted by up to three substituents selected from the group consisting of a chlorine atom, a fluorine atom, C1-4 alkyl radicals, and C5-14 aromatic radicals which are unsubstituted or further substituted by up to nâˆ’1, wherein n is the number of carbon atoms in the aromatic radical substituents selected from the group consisting of a fluorine atom, a chlorine atom and a C1-6 alkyl radical or an amido radical which is unsubstituted or substituted by up to two C1-6 alkyl radicals; R7 and R8 are independently selected from the group consisting of a hydrogen atom, a halogen atom, â€”NR1R2, &boxH;NR1, a alkoxide or â€”OR1, and an â€”OSi(R1)3 group where R1 and R2 are defined above; a saturated or unsaturated straight chained, branched or cyclic C1-10 alkyl radical which is unsubstituted or substituted by a F or Cl atom or up to three C1-4 alkyl radicals; C5-14 aromatic radicals which radicals are unsubstituted or substituted by up to nâˆ’1, wherein n is the number of carbon atoms in the aromatic radical, substituents selected from the group consisting of a F or Cl atom, C1-4 alkyl radicals and an amido radical which is unsubstituted or substituted by up to two C1-4 alkyl radicals; a Lewis Base selected from the group consisting of C1-6 alkyl ethers, C4-8 cyclic ethers, C1-6 tertiary amines, cyclic nitrogen aromatics compounds containing from 4 to 8 carbon atoms, and tertiary C1-10 phosphines; and each R5 is independently selected from the group consisting of radicals selected from the group consisting of saturated and unsaturated straight chained, branched and cyclic hydrocarbyl radicals; radicals of the formula Si(R6)3 wherein each R6 is independently selected from the group consisting of saturated or unsaturated straight chained, branched or cyclic hydrocarbyl radicals; and radicals of the formula III: wherein R9, R10, R11 and R12 are independently selected from the group consisting of radical and E is an endocyclic nitrogen atom or a Câ€”CN group.