| abstract |
PURPOSE: To obtain a catalyst being useful for addition polymn. and with no by-product of amines by oxidizing a deriv. of a Group 4 or Lanthanide metal in the element periodic table with a specified oxidizing agent contg. non- Breonsted acid cation. n CONSTITUTION: A deriv. of a Group 4 or Lanthanide metal of formula I (wherein L is a ligand or a ligand system; M is a Group 4 or Lanthanide metal in the element periodic table; X is hydride or hydrocarbil of at most 20C, silyl, germil, silicon or germanium; I is an integer of at least 1) is prepd. As the pref. example, bis(cyclopentadienyl)dibenzylzirconium, etc., are cited. Then, this deriv. is oxidized with an oxidizing agent of formula II (wherein OX +a a non-Breonsted acid cationic oxidizing agent with electric charge of +a; A - is a monovalent compatible non-cordinated anion; a and b are each an integer) (e.g. ferrocenium perfluorotetraphenyl borate) to obtain an addition polymn. catalyst of formula III. n COPYRIGHT: (C)1992,JPO |