Abstract
Two Schiff base copper complexes: [Cu(H2O)2(HL1)]·2H2O (1) (H3L1 =2-((2,4-dihydroxybenzylidene)amino)acetic acid) and [Cu(L2) (CH3OH)]4 (2) (H2L2 = 3-phenyl-2-(2-hydroxy-5-chlorobenzylideneamino)propane-1-ol), have been simply synthesized and fully characterized. Single crystal X-ray diffraction (SXRD) revealed that 1 consists of one five-coordinated copper atom and one deprotonated Schiff base ligand HL1. The copper atom in 1 showed the distorted tetragonal pyramid geometry, whereas, four copper atoms in 2 were six-coordinated and exhibited the distorted octahedron geometry. Importantly, two Schiff base complexes were further used as catalysts in Chan–Lam coupling reaction and 2 demonstrated excellent catalytic performance in construction of C–N bonds (yields up to 87%).
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