A series of thiosemicarbazones was synthesized from para- substituted acetophenones and thiosemicarbazide. Furthermore, methyl homologues of the reactants were used in the reaction. Surprisingly, two different cyclizations occurred that yielded compounds with 1,2,4-triazolydine and 1,3,4-thiadiazole scaffolds. These compounds were later used as ligands to synthesize organoruthenium half-sandwich complexes with general chemical formula [RuII(η6-p-cym)(L)Cl2] and [RuII(η6-p-cym)(L)Cl]Cl (where L is the ligand) respectively. All the products were characterized with NMR, IR spectroscopy and mass spectrometry. Nine new molecular structures were determined by X-ray diffraction.
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