Discrete and Polymeric Lead(II) Complexes Containing 4-Methyl-1,2,4-triazole-3-thiol Ligand: X-ray Studies,Spectroscopic Characterization,and Thermal Analyses

[Pb(Hmptrz)₄(NO₃)₂] complex (1) and [Pb(μ-mptrz)₂(H₂O)]_n complex (2) (Hmptrz is 4-methyl-1,2,4-triazole-3-thiol) were prepared from the reaction of 4-methyl-1,2,4-triazole-3-thiol with Pb(NO₃)₂ and Pb(OAc)₂·3H₂O in CH₃OH/H₂O, respectively. Both complexes were characterized by elemental analysis, IR, UV–Vis, ¹H NMR, ¹³C{¹H}NMR, and luminescence spectroscopy and their structures were studied by single-crystal X-ray crystallography. The thermal stabilities of the title complexes were studied by thermogravimetric and differential thermal analyses. Complex 1 is a discrete and complex 2 is a polymer; both structures are without precedent in the literature.