Synthesis and Crystal Structure of a Two-dimensional Cadmium Complex Based on Terephthalate and 1-Me

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The title complex, Cd(MeHbibzim)(1,4-bdc)n (1, MeHbibzim = 1-methyl-2,2’- bibenzimidazole, 1,4-bdc = terephthalate), was synthesized with hydrothermal reactions. The compound crystallizes in monoclinic, space group C2/c with a = 9.822(4), b = 18.510(7), c = 22.372(9), β = 98.359(6)°, C23H16CdN4O4 , Mr = 524.81, V = 4024(3)3 , Z = 8, Dc = 1.733 g/cm3 , μ(MoKα) = 1.126 mm-1 , F(000) = 2096, the final R = 0.0597 and wR = 0.1374 for 3906 observed reflections (Ⅰ > 2σ(Ⅰ)). X-ray diffraction analysis reveals that the Cd atom is coordinated by two nitrogen atoms from the chelating MeHbibzim and three carboxyl oxygen atoms from three terephthalate ligands, thus forming a distorted square pyramidal coordination sphere, CdN2O3. Every two Cd atoms are linked together via two carboxyl groups into a dinuclear unit with Cd···Cd separation of 3.806(4). The dinuclear building units are linked by terephthalate ligands into two-dimensional layers, which are further aggregated into a 3D framework via hydrogen bonding interactions. The title complex, Cd (MeHbibzim) (1,4-bdc) n (1, MeHbibzim = 1 -methyl- 2,2’- bibenzimidazole, 1,4-bdc = terephthalate), was synthesized with hydrothermal reactions. The compound crystallizes in monoclinic space group C2 / c with a = 9.822 (4) b = 18.510 (7) c = 22.372 (9) β, β = 98.359 (6) °, C23H16CdN4O4, Mr = 524.81, V = 4024 ), Final3, Z = 8, Dc = 1.733 g / cm3, μ (MoKα) = 1.126 mm -1, F (000) = 2096, the final R = 0.0597 and wR = 0.1374 for 3906 observed reflections I)). X-ray diffraction analysis reveals that the Cd atom is coordinated by two nitrogen atoms from the chelating MeHbibzim and three carboxyl oxygen atoms from three terephthalate ligands, thus forming a distorted square pyramidal coordination sphere, CdN 2 O 3. Every two Cd atoms are linked together via two carboxyl groups into a dinuclear unit with Cd ···. Cd separation of 3.806 (4) . The dinuclear building units are linked by terephthalate ligands into two-dimensional layers, which are further aggregated into a 3D framework via hydrogen bonding interactions.
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