Patent ID: 6410746
Filing Date: 2002-06-25
Classification: B01J,C07C,C07D,C07F

Abstract:
A compound having the formula: wherein M1 and M2 are the same or different and are transition metal atoms or ions; Z2 and Z3, independently, are the atoms necessary to complete a 3-12 membered heterocyclic ring; Z1 is an alkylene or arylene group; Q1 and Q2 are the same or different and are electron withdrawing groups; L1 and L3, taken together, represent â€”Oâ€”CR13â€”Oâ€”; L2 and L4, taken together, represent â€”Oâ€”CR14â€”Câ€”; and R13 and R14 are the same or different and are selected from the group consisting of alkyl groups and aryl groups or R13 and R14 represent alkylene or arylene groups that are directly or indirectly bonded to one another.