TY - JOUR
T1 - Iminobisphosphines to (non-)symmetrical diphosphinoamine ligands
T2 - Metal-induced synthesis of diphosphorus nickel complexes and application in ethylene oligomerisation reactions
AU - Boulens, Pierre
AU - Lutz, Martin
AU - Jeanneau, Erwann
AU - Olivier-Bourbigou, Hélène
AU - Reek, Joost N H
AU - Breuil, Pierre Alain R
PY - 2014/1/1
Y1 - 2014/1/1
N2 - We describe the synthesis of a range of novel iminobisphosphine ligands based on a sulfonamido moiety [R1SO2N=P(R 2)2-P(R3)2]. These molecules rearrange in the presence of nickel by metal-induced breakage of the P-P bond to yield symmetrical and nonsymmetrical diphosphinoamine nickel complexes of general formula Ni{[P(R2)2]N(SO2R 1)P(R3)2}Br2. The complexes can be isolated and are very stable. Upon activation by MAO, these complexes oligomerise ethylene to small chain oligomers (mainly C4-C 8) with high productivity. Surprisingly fast codimerisation reactions of ethylene with butenes is observed, leading to a high content of branched C6 products.
AB - We describe the synthesis of a range of novel iminobisphosphine ligands based on a sulfonamido moiety [R1SO2N=P(R 2)2-P(R3)2]. These molecules rearrange in the presence of nickel by metal-induced breakage of the P-P bond to yield symmetrical and nonsymmetrical diphosphinoamine nickel complexes of general formula Ni{[P(R2)2]N(SO2R 1)P(R3)2}Br2. The complexes can be isolated and are very stable. Upon activation by MAO, these complexes oligomerise ethylene to small chain oligomers (mainly C4-C 8) with high productivity. Surprisingly fast codimerisation reactions of ethylene with butenes is observed, leading to a high content of branched C6 products.
KW - Chelates
KW - Homogeneous catalysis
KW - Nickel
KW - Oligomerisation
KW - Phosphorus
UR - http://www.scopus.com/inward/record.url?scp=84905853814&partnerID=8YFLogxK
U2 - 10.1002/ejic.201402430
DO - 10.1002/ejic.201402430
M3 - Article
AN - SCOPUS:84905853814
SN - 1434-1948
SP - 3754
EP - 3762
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 23
ER -