Patent ID: 7098165

Claim:
A compound according to formula 1 wherein Nu 1 is O, R is mesityl, 2,4,6-trimethylphenyl or 2,6-diisopropylphenyl, R 1 , R 2 , R 3 and R 4 are identical or different radicals and independently of one another are selected from the group consisting of H, C 1 –C 8 -alkyl groups and C 6 –C 14 -aryl groups, M 1 is selected from the group consisting of Ti, Zr, Cr, V, Fe, Co, Ni, Pd, Cu and Zn L 1 is a neutral ligand selected from the group consisting of triphenylphosphine, triethylphosphine, trimethyl-phosphine, dibenzo-phosphol, triphenyl phosphite, triethyl phosphite, trimethyl phosphite, triphenyl phosphite, trimethyl-amine, triethylamine, dimethylaniline, diethylaniline, benzyl-dimethylamine, benzyl-diethylamine, diisopropylamine, diethylamine, dimethylamine, diphenylamine, phenylenediamines, diethyl ether, tetrahydrofuran, water, methanol, ethanol, pyridine, 2-picoline 3-picoline, 4-picoline, 2,3-lutidine, 2,4-lutidine, 2,5-lutidine, 2,6-lutidine, 3,5-lutidine, CO, acrylonitrile, acetonitrile, propionitrile, butyronitrile, benzonitrile, ethenyl, propenyl, cis-2-butenyl, trans-2-butenyl, cyclohexenyl and norbornenyl, L 2 is an anionic ligand selected from the group consisting of chloride, bromide, dimethylamide, diethylamide, amide, 2-carboxylic acid methallyl ester, allyl, methyl, ethyl, n-propyl, i-propyl, n-butyl, tert.-butyl, hexyl and phenyl z may be a whole number from 1 to 3.