Preparation, chemical characterization and thermal study of 2-aminopyridinium salts of square-planar 1,2-dithiooxalato-S,S′ metal complexes (M NiII, PdII and PtII)

摘要: Abstract Reaction of an aqueous solution 2-aminopyridinium chloride with the appropriate K2[M(S2C2O2)2] salt yielded microcrystalline powders three complexes formulae (HC5H6N2)2[Ni(S2C2O2)2] (1), (HC5H6N2)2[Pd(S2C2O2)2] (2) and (HC5H6N2)2 [Pt(S2C2O2)2] (3), which were characterized by elemental analysis, IR UV-vis spectroscopies, thermal analysis (TG, DTG DTA) X-ray powder diffraction techniques. The spectra support presence aromatic cation complex anions. Single crystals 1 grown in silica hydrogel at room temperature employing test tubes. However, this compound is not stable on exposure only unit cell parameters determined. compounds are isostructural, crystallize monoclinic space group C2/c Z = 8. Thermal studies give evidence that mechanism final solid products strongly influenced atmospheric conditions. decomposition identified technique. In argon-oxygen atmosphere, degradation led to a mixture nickel sulphide, oxides sulphate for 1, metallic palladium palladium(II) oxide 2, platinum(O) 3. decompositions inert atmosphere nickel(II) Pd-PdS platinum, respectively.