Keywords
1,2,4-triazolin-5-ylidene ligands
anticancer activities
NMR probe
palladium-NHC
palladium(II) complexes
Abstract
Two novel palladium(ii) complexes, trans-[PdBr2(tz-Mes)2] and trans-[PdBr2(tz-Dipp)2] featuring less explored 1,2,4-triazole-derived N-heterocyclic carbene (tz) have been synthesized. In solution, they exist both as trans-syn and trans-anti rotamers while their syn/anti ratios can be determined by 1H NMR harnessing the built-in aromatic rings as NMR probes. Complex trans-[PdBr2(tz-Mes)2] is highly cytotoxic toward A549, MCF-7, LNCaP and HT-29 cancerous cells.
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