A series of 30 organic chlacones and 33 ferrocenyl (Fc) chalcones were synthesized and characterized by melting point, elemental analysis, spectroscopy (1H NMR and FTIR) and, in two cases, by X-ray crystallography. The biological activity of each compound (10− 4M in DMSO) against the model nematode Caenorhabditis elegans was examined in terms of% mortality (percent nematodes that died) and% fecundity (percent nematodes that ...