title: Synthesis and crystal structures of two coordination polymers and a binuclear cadmium(II) complex containing 3- and 4-aminobenzoate ligands.
abstract: Due to their wide range of coordination modes and versatile conformations when binding to metal atoms, multicarboxylate ligands are of interest in the design of metal-organic frameworks (MOFs). Three Cd(II) complexes, namely catena-poly[diammonium [[chloridocadmium(II)]-di-μ-chlorido-[chloridocadmium(II)]-bis(μ-3-aminobenzoato)-κ(3)N:O,O';κ(3)O,O':N]], {(NH4)[CdCl2(C7H6NO2)]}n, (I), catena-poly[[[aquacadmium(II)]-bis(μ-4-aminobenzoato)-κ(3)N:O,O';κ(3)O,O':N] monohydrate], {[Cd(C7H6NO2)2(H2O)]·H2O}n, (II), and di-μ-acetato-κ(4)O:O'-bis[(4-aminobenzoato-κ(2)O,O')(2,2'-bipyridine-κ(2)N,N')cadmium(II)], [Cd2(CH3COO)2(C7H6NO2)2(C10H8N2)2], (III), with different stuctural forms are reported. Complex (I) has a one-dimensional ladder structure, with strong N-H···O and weak N-H···Cl hydrogen bonds linking the cations and anions in the three-dimensional supramolecular structure. Complex (II) has a one-dimensional chain structure. Extensive O-H···O and N-H···O hydrogen bonds between the anionic ligands and the solvent water molecules and π-π stacking interactions between the centroids of the benzene rings lead to the three-dimensional supramolecular structure. Complex (III) is a binuclear molecule which is extended into a three-dimensional supramolecular structure via strong N-H···O and weak C-H···O hydrogen bonds.
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Dong-Mei
authors.initials: DM
authors.lastname: Zhou
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Xiao-Lan
authors.initials: XL
authors.lastname: Zhao
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Feng-Yi
authors.initials: FY
authors.lastname: Liu
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Kou
mesh_terms: D062365:Aminobenzoates / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008024:Ligands; D008968:Molecular Conformation; D011108:Polymers / Q000737:chemistry*
chemical_list: D062365:Aminobenzoates; D056831:Coordination Complexes; D008024:Ligands; D011108:Polymers; D002104:Cadmium
keywords: aminobenzoate ligands; binuclear cadmium(II) complex; crystal structure; hydrogen bonds; one-dimensional cadmium(II) coordination polymer; supramolecular structure; π–π stacking interactions