Premium
Iminobisphosphines to (Non‐)Symmetrical Diphosphinoamine Ligands: Metal‐Induced Synthesis of Diphosphorus Nickel Complexes and Application in Ethylene Oligomerisation Reactions
Author(s) -
Boulens Pierre,
Lutz Martin,
Jeanneau Erwann,
OlivierBourbigou Hélène,
Reek Joost N. H.,
Breuil PierreAlain R.
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402430
Subject(s) - chemistry , ethylene , nickel , moiety , yield (engineering) , metal , molecule , stereochemistry , polymer chemistry , medicinal chemistry , catalysis , organic chemistry , materials science , metallurgy
We describe the synthesis of a range of novel iminobisphosphine ligands based on a sulfonamido moiety [R 1 SO 2 N=P(R 2 ) 2 ‐P(R 3 ) 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(R 2 ) 2 ]N(SO 2 R 1 )P(R 3 ) 2 }Br 2 . The complexes can be isolated and are very stable. Upon activation by MAO, these complexes oligomerise ethylene to small chain oligomers (mainly C 4 –C 8 ) with high productivity. Surprisingly fast codimerisation reactions of ethylene with butenes is observed, leading to a high content of branched C 6 products.