A Tetranuclear Complex Assembled from N,N'-Bis(4-(3'-formyl-5'-methylsalicyclidene)-iminoethyl)-4-methyl-2,6-bimethyliminophenol

The reaction of 2,6-diformyl-4-methylphenol, ethylenediamine and Cu(Ⅱ) in the proportion of 3:2:2 yields a new tetranuclear copper(Ⅱ) complex, Cu2L]2(ClO4)2·2H2O (H3L = N,N'-bis(4-(3'-formyl-5'-methylsalicyclidene)iminoethyl)-4-methyl-2,6-bimethyliminophenol). The complex has been characterized by ES-MS, IR and X-ray diffraction analysis, and its crystal crystallizes in the triclinic system, space group P1 with a = 10.8673(11), b = 12.0829(12), c = 14.4834(15) A, α = 111.946(2), β = 105.828(2), γ = 99.583(2)°, V = 1618.5(3) A3, Dc = 1.605 g/cm3, Z = 2, Mr = 1564.26, F(000) = 800.0,μ(MoKa) = 1.460/mm, S = 1.063, R = 0.0612 and wR = 0.1163 for 6245 observed reflections (I > 2σ(Ⅰ)). The complex is a dimer of dinuclear copper(Ⅱ) acylic enantiomorph subunit Cu2L]CIO4·H2O, held together by π…π, weak coordination and hydrogen bonding interactions. In addition, the π…π interactions related to phenyl moieties as well as CH=N…π interactions were also found to stabilize the supramolecular architectures in the solid state.