Open AccessNickel(II) Complexes Bearing 4‐Arylimino‐1,2,3‐trihydroacridines: Synthesis, Characterization, and Ethylene Oligomerization
Author(s) -
Wang Shengdong,
Du Shizhen,
Zhang Wenjuan,
Asuha Sin,
Sun WenHua
Publication year - 2015
Publication title -
chemistryopen
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 29
ISSN - 2191-1363
DOI - 10.1002/open.201402113
Subject(s) - nickel , chemistry , ethylene , dimethoxyethane , olefin fiber , polymer chemistry , bromide , trigonal bipyramidal molecular geometry , coordination geometry , catalysis , infrared spectroscopy , oligomer , polymerization , crystal structure , crystallography , inorganic chemistry , molecule , organic chemistry , polymer , hydrogen bond , electrode , electrolyte
Nickel(II) complexes have attracted much attention as a new generation of olefin catalysts since the α‐diiminonickel complex was discovered as a highly efficient procatalyst for ethylene polymerization. A series of novel 4‐arylimino‐1,2,3‐trihydroacridylnickel(II) dihalide complexes was synthesized in a one‐pot reaction of 2,3‐dihydroacridine‐4‐one and different anilines with nickel(II) chloride or nickel(II) bromide 1,2‐dimethoxyethane complex. The complexes were characterized by infrared spectroscopy and elemental analysis. The molecular structures of the representative complexes 4‐(2,6‐diisopropylphenylimino)‐1,2,3‐trihydroacridylnickel(II) dichloride ( C3 ), 4‐(2,4,6‐trimethylphenylimino)‐1,2,3‐trihydroacridylnickel dichloride(II) ( C4 ), and 4‐(2,4,6‐trimethylphenylimino)‐1,2,3‐trihydroacridylnickel(II) dibromide ( C9 ) were confirmed by single‐crystal X‐ray crystallography, revealing a distorted tetrahedral geometry around the nickel(II) of C3 and distorted trigonal bipyramidal geometry for C4 and C9 . With the activation of trimethylaluminium (TMA), all nickel(II) complexes exhibited good activity for ethylene oligomerization, and oligomer products ranged from butene (C 4 ) to hexadecene (C 16 ).