Patent ID: 6093824
Filing Date: 2000-07-25
Classification: C07F,C08F,Y10S

Abstract:
A catalyst precursor (having) represented by a formula selected from the group consisting of: ##STR7## wherein M is a metal selected from the group consisting of Group IIIB to VIII and Lanthanide series elements; each X is selected from the group consisting of hydrogen, aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radicals having 1-20 carbon atoms, --NR.sub.2 or RCO.sub.2 -- wherein R is a hydrocarbon radical having 1-20 carbon atoms, and halogens; o is 0, 1, 2, or 3 depending on the valence of M; each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is a hydrocarbon group containing 1-20 carbon atoms and two or more adjacent R.sup.1, R.sup.2, R.sup.3, or R.sup.4 groups may be joined to form an aliphatic or aromatic ring; and each m is independently from 0 to 4; with the proviso, for formula I, when M is titanium or vanadium and X is halogen, m is 1 to 4.