2-Dialkylaminobenzyl and 2-dialkylaminomethylphenyl derivatives of selected transition metals
AssigneeE. I. Du Pont de Nemours and Company
InventorLeo Ernest Manzer
Life of this patent
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Abstract
Transition metal compounds of the formulae M.sup.1 A.sub.3 (1) wherein M.sup.1 is scandium, yttrium, chromium, or rare earth metal, and A is 2-dialkylaminobenzyl or 2-dialkylaminomethylphenyl, or a lower alkyl derivative thereof, M.sup.2 A.sub.2 (2) wherein M.sup.2 is Cr or Mo and M.sup.3 A.sub.4 (3) wherein M.sup.3 is Ti, Zr or Hf Are useful as components of coordination catalysts for olefin polymerization. Lithium compounds of the formula LiA are intermediates used in preparing the above compounds. All of the above compounds are also useful as oxygen-scavenging agents.
Claims11
Transition metal compounds of the formulae
- M.sup.1 A.sub.3 ( 1)
- wherein
- M.sup.1 = sc, Y or a rare earth metal, and ##STR8## where x = 0 or 1
- R.sup.1, r.sup.2 and the R.sup.3 's are each C.sub.1 -C.sub.8 alkyl, and
- n = 0, 1, 2, 3 or 3 + x,
- when x = 0, the position in the benzene ring adjacent to the --NR.sup.1 R.sup.2 substituent, other than that occupied by the --CH.sub.2 -- substituent, being unsubstituted,
- M.sup.2 A.sub.2 ( 2)
- wherein
- M.sup.2 = cr or Mo, and
- M.sup.3 A.sub.4 ( 3)
- wherein
- M.sup.3 = ti, Zr or Hf,
- there being a coordination bond between M.sup.1, M.sup.2 or M.sup.3 and the nitrogen of A.
Dependencies are inferred from the claim text.