Patent ID: 7351678

Claim:
A nitrogen-containing organoaluminium complex of formula (I) in which (1) R 1 and R 1 ′ are CH 3 , R and R′, independently of one another, are branched or unbranched C 3-7 -alkyl, R 2 is R 3 CH 2 , m and o are 1, and n=0; (2) R 1 and R 1 ′ are C 2 H 5 , R and R′, independently of one another, are branched or unbranched C 1 -C 7 -alkyl, R 2 is CH 2 , m and o =1, and n =o; (3) R, R′, R 1 and R 1 ′, independently of one another, are branched or unbranched C 1 -C 7 -alkyl, R 2 is R 4 is CH 2 , n and o are 1, and m is 0; or (4) R 1 and R 1 ′ are CH 3 , R and R′, independently of one another, are branched or unbranched C 3 -C 7 -alkyl, or R 1 and R 1 ′ are C 2 H 5 and R and R′, independently of one another, are branched or unbranched C 1 -C 7 -alkyl, R 2 is o is 1, and m and n are 0.