Addition polymerization catalysts comprising reduced oxidation state metal complexes

摘要

PCT No. PCT/US93/02584 Sec. 371 Date Sep. 2, 1994 Sec. 102(e) Date Sep. 2, 1994 PCT Filed Mar. 19, 1993 PCT Pub. No. WO93/19104 PCT Pub. Date Sep. 30, 1993.Metal complexes useful in the formation of addition polymerization catalysts of the formula: up or substituted derivative thereof; Z is a divalent moiety comprising oxygen, nitrogen, phosphorous, boron or a member of Group 4 of the Periodic Table of Elements; Y is a linking group comprising nitrogen, phosphorus, oxygen or sulfur; M is a Group 4 metal in the +3 oxidation state; and L''' is a monovalent anionic stabilizing ligand.