Huai-Xia Yang

Construction of Cd(II) complexes based on 2-(1H-imidazol-1-methyl)-1H-benzimidazole and 1,4-benzenedicarboxylate

Abstract Three new Cd(II) complexes incorporating both 2-(1H-imidazol-1-methyl)-1H-benzimidazole (imb) and 1,4-benzenedicarboxylate (bdic2−), [CdCl(bdic)1/2(imb)2]n (1), {[Cd(bdic)(imb)(H2O)]·DMF·2H2O}n (2), and [Cd(bdic)(imb)]·3H2O}n (3), have been prepared and structurally characterized by single crystal X-ray diffraction. Bdic2− anions connect the⋯Cd-imb-Cd-imb⋯chains leading to a 2-D structure of 1. Bdic2−(A) and bdic2−(B) anions link the binuclear [Cd2(imb)2(H2O)2] units forming a 2-D structure of 2. Complex 3 features a 2-D structure involving supramolecular “double-layer” motifs. IR spectra and thermogravimetric curves are consistent with the results of the X-ray crystal structure analysis; 1–3 exhibit good fluorescence in the solid state at room temperature.

Synthesis, Crystal Structure, and Properties of a Cd(II) Coordination Polymer Based on 2-((Benzoimidazol- yl)methyl)-1H-Tetrazole and 1,3-Benzenedicarboxylate Ligands

A new coordination polymer, [Cd(bimt)(bdc)]n (1), has been synthesized through the self-assembly of Cd(NO3)2 with unsymmetrical N-heterocyclic ligand 2-((benzoimidazol-yl)methyl)-1H-tetrazole (bimt) and 1,3-benzenedicarboxylic acid (H2bdc). Single-crystal X-ray diffraction determination shows that polymer 1 possesses an infinite 2-D layered structure with intersecting linear chains ···(Cd)2-(bimt)2··· and ···(Cd)2-(bdc)2···, respectively. The adjacent layers are connected through the hydrogen bond resulting in a three-dimensional packing structure in solid state. In addition, the luminescent and the thermal properties have been investigated.

Crystal structure of poly[[µ2-1,2-benzenedicarboxylato-κ4O,O':O'',O''']- [µ2-2-((1H-imidazol-1-yl)-6-methyl)-1H-benzoimidazole-κ2N:N']- cadmium(II)], C20H15CdN4O4

Abstract C20H15CdN4O4, triclinic, P1̅ (no. 2), a = 9.927(2) Å, b = 9.970(2) Å, c = 11.046(2) Å, ɑ = 80.94(3)°, β = 75.54(3)°, γ = 68.27(3)°, V = 980.8(3) Å3, Z = 2, Rgt(F) = 0.0281, wRref(F2) = 0.0703, T = 293 K.