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Nickel(II) Complexes Bearing 4-Arylimino-1,2,3-trihydroacridines: Synthesis, Characterization, and Ethylene Oligomerization.

Wang S, Du S, Zhang W, Asuha S, Sun WH - ChemistryOpen (2015)

Bottom Line: 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.With the activation of trimethylaluminium (TMA), all nickel(II) complexes exhibited good activity for ethylene oligomerization, and oligomer products ranged from butene (C4) to hexadecene (C16).

View Article: PubMed Central - PubMed

Affiliation: Chemistry & Environment Science College, Inner Mongolia Normal University, and Key Laboratory of Physics & Chemistry of Functional Materials, Inner Mongolia 81 Zhaowudalu, Huhhot, 010022, P. R. China ; Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry, Chinese Academy of Science Beijing, 100190, P. R. China.

ABSTRACT
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 (C4) to hexadecene (C16).

No MeSH data available.


Molecular structure of a) C3, b) C4⋅CH3OH, and c) C9⋅CH3OH. Thermal ellipsoids are shown at 30 % probability. Hydrogen atoms have been omitted for clarity.
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fig01: Molecular structure of a) C3, b) C4⋅CH3OH, and c) C9⋅CH3OH. Thermal ellipsoids are shown at 30 % probability. Hydrogen atoms have been omitted for clarity.

Mentions: Single crystals of C3, C4, and C9 suitable for X-ray analysis were obtained by layering diethyl ether on their methanol solutions at room temperature. The molecular structures are shown in Figure 1 a–c, and selected bond lengths and angles are listed in Table 1.


Nickel(II) Complexes Bearing 4-Arylimino-1,2,3-trihydroacridines: Synthesis, Characterization, and Ethylene Oligomerization.

Wang S, Du S, Zhang W, Asuha S, Sun WH - ChemistryOpen (2015)

Molecular structure of a) C3, b) C4⋅CH3OH, and c) C9⋅CH3OH. Thermal ellipsoids are shown at 30 % probability. Hydrogen atoms have been omitted for clarity.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4522183&req=5

fig01: Molecular structure of a) C3, b) C4⋅CH3OH, and c) C9⋅CH3OH. Thermal ellipsoids are shown at 30 % probability. Hydrogen atoms have been omitted for clarity.
Mentions: Single crystals of C3, C4, and C9 suitable for X-ray analysis were obtained by layering diethyl ether on their methanol solutions at room temperature. The molecular structures are shown in Figure 1 a–c, and selected bond lengths and angles are listed in Table 1.

Bottom Line: 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.With the activation of trimethylaluminium (TMA), all nickel(II) complexes exhibited good activity for ethylene oligomerization, and oligomer products ranged from butene (C4) to hexadecene (C16).

View Article: PubMed Central - PubMed

Affiliation: Chemistry & Environment Science College, Inner Mongolia Normal University, and Key Laboratory of Physics & Chemistry of Functional Materials, Inner Mongolia 81 Zhaowudalu, Huhhot, 010022, P. R. China ; Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry, Chinese Academy of Science Beijing, 100190, P. R. China.

ABSTRACT
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 (C4) to hexadecene (C16).

No MeSH data available.