Crystal Structure of Bis[4-(2-oxy-1-naphthylmethyliminomethtyl-N,O:O)-2-penten-2-olato-O]dicopper(II) Complex
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The structures of dimeric Cu complexes of Cu2(C11- H10C1N02)2,1 Cu2(C14H11N02)2,2 and Cu2(C12H13N02)2,3 in the presence of different tridentate ONO type Schiffbase ligands are reported from this laboratory. The title compound is a continuation of forming dimeric Cu complexes and a determination of the crystal structure by our group. The dimeric Cu" complexes bridged with an 0 atom possess subnormal magnetic moments due to a super-exchange interaction.4-6 In the present work concerning Cu2(C16H,5N02)2 our aim was to investigate the effect of the ligand stereochemistry around the Cu atom. 2-Hydroxy-l-naphthaldehyde (0.73 g, 0.01 mol) was dissolved in ethanol (50 ml) by heating. Into this solution acetylacetone (1.0 g, 0.01 mol) was added and mixed. The mixture was set aside for 24 h. The precipitated ligand was filtered out and dried in air; (0.255 g, 0.001 mol) of this ligand was dissolved in 50 ml of DMF : McCN : McOH (1:1:1) and mixed with Cu(CH3C00)2•H20 (0.199 g, 0.001 mol) in hot 20 ml McOH (see also Fig, 1). The mixture was heated to nearly 80° C and crystals were obtained after allowing the solution to stand for 24 h at room temperature. Table 1 shows the crystal and experimental data, while the final atomic parameters are given in Table 2. The bond distances and angles are given in Table 3. The reported complex is centrosymmetric, and the asymmetric unit is bridged via the 0 atom of the 2-oxy-1- naphthylmethyliminomethyl group of the ligand (Fig. 2).
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