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Nickel(II) Complexes Bearing NH2CH2CH2CH2NH2 and o-C6H4(NH2)2 Ligands: Synthesis, Structures and Their Ethylene Polymerization Behavior

✍ Scribed by Xiaoming LU; Zhen WANG; Man LIU

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 130 KB
Volume: 27
Category: Article
ISSN: 0256-7660
DOI: 10.1002/cjoc.200990036

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✦ Synopsis

Two nickel complexes [Ni(NH 2 CH 2 CH 2 CH 2 NH 2 ) 3 ]Cl 2 (1) and[Ni(C 6 H 4 N 2 H 4 ) 2 Cl 2 ] (2) have been obtained and characterized by IR and single crystal X-ray diffraction analysis. In complex 1, the nickel atom was in a chiral pseudo-octahedral [NiN 6 ] geometry environment, which was coordinated by three 1,3-propylenediamine to form three six-membered rings. However in complex 2, besides connected with two o-phenylenediamine through four Ni-N bonds to form two five-membered rings, the nickel center was coordinated by two Cl to form trans-Ni-Cl 2 , which was different from general reported diimine nickel complexes. Activated with MAO, MMAO or Et 2 AlCl, these nickel complexes exhibited considerable good catalytic activity [up to 3.59×10 6 g•mol

for ethylene polymerization with main products as dimers or trimers of ethylene.

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