Jiuquan Vacational and Technical College

Jiuquan, China

Jiuquan Vacational and Technical College

Jiuquan, China
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Li W.-Y.,Jiuquan Vacational and Technical College | Zhang Y.-J.,Lanzhou Jiaotong University | Dong X.-Y.,Lanzhou Jiaotong University | Li X.,Lanzhou Jiaotong University | Wang L.,Lanzhou Jiaotong University
Asian Journal of Chemistry | Year: 2013

A new mononuclear Cu(II) complex, [CuL], has been synthesized by the reaction of copper(II) acetate tetrahydrate with H2L (H2L = 4-bromo-6'-methoxy-2,2'-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol). X-Ray crystallographic analysis reveals that the complex crystallizes in the monoclinic system, space group P2(1) and the unit cell contains two crystallographically independent but chemically identical molecules which interlink each other into a 1D infinite chain through four strong intermolecular O12-H12C...O4, O12-H12D...O5, O11-H11C...O9 and O11-H11D...O10 hydrogen bonds.


Li W.-Y.,Jiuquan Vacational and Technical College | Xiang-Li,Lanzhou Jiaotong University | Zhao M.-M.,Lanzhou Jiaotong University | Li G.,Lanzhou Jiaotong University | Dong X.-Y.,Lanzhou Jiaotong University
Asian Journal of Chemistry | Year: 2014

An unexpected dinuclear Cu(II) complex, [Cu2 (L 2)2] (H2L2 = 3- methoxysalicylaldehyde-O-(2-hydroxyethyl)oxime) has been synthesized through the complexation of Cu(OAc)2H2O with an asymmetrical Salamo-type compound 6-ethyloxy-6'-methoxy-2,2'- [ethylenediyldioxybis(nitrilomethylidyne)]diphenol (H2L1). The catalysis of Cu(II) ions results in the unexpected cleavage of one of the N-O bonds in the ligand H2L1, giving a novel dialkoxo-bridged dinuclear Cu(II) complex possessing a Cu-O-Cu-O four-membered ring core instead of the usually desired Salamo-type Cu-N2O 2 mononuclear complex. In the crystal structure, two intermolecular hydrogen bonds, C2-H2BO3 and C2-H2BO4 linked the neighboring molecules into an infinite chain parallel to the a axis.


Li W.-Y.,Jiuquan Vacational and Technical College | Zong Y.-X.,Hexi University | Wang J.-K.,Hexi University | Wang J.-K.,Jiuquan Vacational and Technical College | Niu Y.-Y.,Hexi University
Chinese Chemical Letters | Year: 2014

Sulfonated poly(4-vinylpyridine) heteropolyacid salts acted as a heterogeneous catalyst to effectively catalyze the one-pot synthesis of β-amino carbonyl compounds via the Mannich reaction between aromatic aldehydes, aromatic ketone, and aromatic amines. In addition, the catalyst could be easily recovered by the filtration and reused six times without significant loss of catalytic activity. © 2013 Ying-Xiao Zong and Jun-Ke Wang.

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