Compound N-N E IC50/mMa 3a TMEDA   4.33 ± 0.05 3b bpy   4.34 ± 0.05 3c dmbpy   4.35 ± 0.05 3d phen   4.36 ± 0.05 4a TMEDA O 3.02 ± 0.04 4b bpy O 3.03 ± 0.04 4c dmbpy O 3.05 ± 0.04 4d phen O 3.14 ± 0.04 5a TMEDA S 3.014 ± 0.04 5b bpy S 3.022 ± 0.04 5c dmbpy S 3.012 ± 0.06 5d phen S 3.027 ± 0.05 aMTT assay from DMSO stock solution on human leukaemic K562 cells. (1h exposure)

Table 1: In vitro activity of palladacycles against a K562 cell line.