The Hg(3,3′-dimethyl-1 H ,1 H ′-4,4′-bipyrazolate) coordination polymer: Synthesis, crystal structure and thermal behavior

The novel coordination polymer Hg(Me(2)BPZ) (H(2)Me(2)BPZ = 3,3'-dimethyl-1H, 1'H-4,4'-bipyrazole) was prepared by reacting the H(2)Me(2)BPZ ligand and mercury(II) acetate. The crystal structure of Hg (Me(2)BPZ), determined by powder X-ray diffraction with laboratory instrumentation, is characterized by a (4,4)-connected 3-D polymeric network, in which the metal ions show a see-saw stereochemistry. Investigating the thermal behavior by thermogravimetric analysis and variable-temperature powder X-ray diffraction revealed that the material is stable up to 340 degrees C, both under nitrogen and in air, and undergoes a volumetric thermal expansion amounting to similar to 2% before losing crystallinity. (C) 2017 Elsevier B.V. All rights reserved.