Abstract
A new series of palladium (II) and platinum (II) complexes containing ferrocenyl and cyrhetrenyl thiosemicarbazone ligands were synthesized and characterized. The two-step reaction of the organometallic thiosemicarbazones with i) K2MCl4 and ii) PPh3 and their subsequent recrystallization from CH2Cl2/hexane yielded the binuclear complexes [Mˋ{MLn(η5-C5H4)C(H)NNC(S)NHR}–(Cl)(PPh3)] (M′Pd, Pt; MLnRe(CO)3, FeCp; RH, CH3). The structures of the products were inferred from elemental analyses and IR, 1H and 31P NMR spectroscopies. The molecular structures of 2b and 3d were confirmed by single crystal X-ray analysis. All complexes were screened in vitro against Mycobacterium tuberculosis and exhibited only moderate activity in the low micromolar range.
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