title: Two new cadmium(II) coordination polymers based on bis(1,2,4-triazol-1-yl)alkane ligands and pyrazine-2,3-dicarboxylic acid.
abstract: Assemblies of pyrazine-2,3-dicarboxylic acid and Cd(II) in the presence of bis(1,2,4-triazol-1-yl)butane or bis(1,2,4-triazol-1-yl)ethane under ambient conditions yielded two new coordination polymers, namely poly[[tetraaqua[μ2-1,4-bis(1,2,4-triazol-1-yl)butane-κ(2)N(4):N(4')]bis(μ2-pyrazine-2,3-dicarboxylato-κ(3)N(1),O(2):O(3))dicadmium(II)] dihydrate], {[Cd2(C6H2N2O4)2(C8H12N6)(H2O)4]·2H2O}n, (I), and poly[[diaqua[μ2-1,2-bis(1,2,4-triazol-1-yl)ethane-κ(2)N(4):N(4')]bis(μ3-pyrazine-2,3-dicarboxylato-κ(4)N(1),O(2):O(3):O(3'))dicadmium(II)] dihydrate], {[Cd2(C6H2N2O4)2(C6H8N6)(H2O)2]·2H2O}n, (II). Complex (I) displays an interesting two-dimensional wave-like structure and forms a distinct extended three-dimensional supramolecular structure with the help of O-H...N and O-H...O hydrogen bonds. Complex (II) has a three-dimensional framework structure in which hydrogen bonds of the O-H...N and O-H...O types are found.
authors.affiliation: School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Xia
authors.affiliation: School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, People's Republic of China.
authors.forename: Xiao Lin
authors.initials: XL
authors.lastname: Gong
authors.affiliation: School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, People's Republic of China.
authors.forename: Xing
authors.initials: X
authors.lastname: Fan
keywords: bis(1,2,4-triazol-1-yl)butane; bis(1,2,4-triazol-1-yl)ethane; crystal structure; hydrogen bonds; pyrazine-2,3-dicarboxylic acid; three-dimensional cadmium(II) coordination polymer; two-dimensional cadmium(II) coordination polymer