二维配位聚合物[K2(5-nbdc)2Cd(Ⅱ)·imH·H2O]∞的合成和晶体结构(英)

The crystal structure of the title complex, [K₂(5-nbdc)₂Cd(Ⅱ)·imH·H₂O]_∞ (5-nbdc=5-nitro-1,3-benzenedicarbonate, imH=imidazole) has been determined by X-ray diffraction analysis. The crystal data are: tetragonal, space group P4₁, M_r=694.93 for CdC₁₉H₁₂N₄O₁₃K₂, a=1.018 6(10) nm, b=1.018 6(10) nm, c=2.436 7(5) nm; Z=4, V=2.528 2(6) nm³, F(000)=1 376, D_c=1.826 Mg·m^-3, μ=1.267 mm^-1. The title polymeric complex exhibits a two-dimensional framework, in which adjacent Cd(Ⅱ) ions are bridged by μ-O₄-5-nitro-1,3-benzenedicarbonate groups forming one-dimensional chains that are further linked by μ-O₃-5-nitro-1,3-benzenedicarbonate groups into two-dimensional anion rectangle sheets with large 32-membered rings. The strong π-π stacks of the benzene rings link these adjacent sheets into a three-dimensional van der Waals network. CCDC: 245527.

Synthesis and crystal structure of Poly[Dipotassium bis(5-nitro-1,3-benzenedicarbonate) cadmium(Ⅱ)monoimidazolemonohydrate]

The crystal structure of the title complex, [K2 (5-nbdc)2Cd(Ⅱ)·imH· H2O]∞ (5-nbdc=5-nitro-1,3-benzenedicarbonate, imH=imidazole) has been determined by X-ray diffraction analysis. The crystal data are: tetragonal, space group P41, Mr=694.93 for CdC19H12N4O13K2, a=1.018 6(10) nm, b=1.018 6(10) nm, c=2.4367(5) nm; Z=4,mensional framework, in which adjacent Cd(Ⅱ) ions are bridged byμ-O4-5-nitro-1,3-benzenedicarbonate groups forming one-dimensional chains that are further linked byμ-O3-5-nitro-1,3-benzenedicarbonate groups into twodimensional anion rectangle sheets with large 32-membered rings. The strong π-π stacks of the benzene rings link these adjacent sheets into a three-dimensional van der Waals network. CCDC: 245527.