Polyhemi(hexa­aqua­zinc) μ2-13-bis­(124-triazol-1-yl)methane(μ2-5-sulfonato­benzene-13-dicarboxyl­ato)zinc sesquihydrate

摘要

The title coordination polymer, {[Zn(H2O)6]0.5[Zn(C8H3O7S)(C5H6N6)]·1.5H2O}n, synthesized under hydro­thermal conditions, possesses a one-dimensional tube-like chain structure along [100], with octahedral [Zn(H2O)6]²⁺ groups ( symmetry) trapped in the pores. The other Zn atom is five-coordinated in a highly distorted trigonal–biyramidal coordin­ation that is defined by two different N atoms from two 1,3-bis­(1,2,4-triazol-1-yl)methane (btrm) ligands and three carboxyl­ate O atoms from 5-sulfonato­benzene-1,3-dicarboxyl­ate ligands. The chains carry negative charges, whereas the free [Zn(H2O)6]²⁺ cations are positively charged. The [Zn(H2O)₆]²⁺ cation is connected with the one-dimensional tubelike chain through weak classical O—H⋯O and O—H⋯N hydrogen-bonding inter­actions as well as through electrostatic inter­actions. One of the two uncoordinated water molecules exhibits half-occupancy.