TL;DR: In this paper , the authors synthesized four new Au(I)-NHC complexes (1-4) by reacting (1,3-bis(2,6-di-isopropylphenyl)imidazol-2-ylidenegold(I)chloride) (Au(Ipr)Cl) with four different thiones, namely N-(i-propyl)IMidazolidine- 2-thione (i-PrImt), N-(dipropyl)-imidrazolidine (2-THione), 1, 3-Diazinane-2,Diaz, and 1,3 -Diazipane- 2 -thione(Diap), which showed moderate anticancer activities against selected cancer cell lines.