Citation: YUAN Wei-Guan, TANG Wei, ZHANG Hong-Ling, ZHAO Bo, XIONG Fang, JING Lin-Hai, QIN Da-Bin. Two Amine-tethered Imidazolium NHC Ni(Ⅱ) Complexes: Synthesis, Structure and Catalytic Activity[J]. Chinese Journal of Structural Chemistry, ;2014, 33(3): 325-332. shu

Two Amine-tethered Imidazolium NHC Ni(Ⅱ) Complexes: Synthesis, Structure and Catalytic Activity

1.
Key Laboratory of Chemical Synthesis and Pollution Control of Sichuan Province, School of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China

Received Date: 10 May 2013
Available Online: 2 January 2014
Fund Project: This work was supported by the National Natural Science Foundation of China (21102117) (21102117) the Education Department of Sichuan Province (09ZX010) (09ZX010)

Nickel(Ⅱ) complexes Ni(L₁)₂ (1) and Ni(L₂)₂·CH₃CN·H₂O (2) (L₁Cl=2-(3-benzyl-2,3-dihydroimidazlo-1-yl)-N-(pyridin-2-yl)acetamide, chloride salt, L₂Cl=2-(3-naphthalene-2-ylmethyl)-2,3-dihydro-imidazlo-1-yl)-N-phenylacetamide, chloride salt) with amide-functionalized imidazolium NHC ligand were synthesized and determined by single-crystal X-ray diffraction. Complex 1 crystallizes in the monoclinic system, space group P2₁/c with a=9.2561(19), b=15.138(3), c=20.750(4) Å, β=90.216(3)°, V=2907.3(10) Å³ and Z=4. Complex 2 crystallizes in the orthorhombic system, space group Pbca with a=15.5469(16), b=15.3521(15), c=31.177(3) Å, V=7441.2(13) Å³ and Z=8. They are stable in the air and formed via intermolecular weak interactions, including C-H…π contacts and C-H…O hydrogen bonds. Complex 1 was applied in Suzuki coupling reaction through the investigation of reaction conditions under the optimal choice conditions: 80℃, K₃PO₄, 3% mol catalysts, 6% mol PPh₃ and toluene as solvent system could afford 96% yield in 5 h.
- N-heterocyclic carbene-nickel,
- crystal structure,
- Suzuki coupling,
- catalysis
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