**8. Conclusions**

In summary, a series of Ag(I) complexes were synthesized and characterized using different spectroscopic and analytical techniques. Antimicrobial properties of all Ag(I) complexes were evaluated against four Gram-negative, three Grampositive bacterial strains and two fungal strains. New silver complexes showed high antibacterial activity compared with the precursors against gram (+)/(−) bacteria and fungi strains. Various substituents on nitrogen atoms have a different effect on antimicrobial activity. In addition, the Ag(I) complexes **5i** and **5f** showed good antitumor activity against MDA-MB-231, and MCF-7 cell lines. Moreover, further studies focused on the synthesis of (benz)imidazol-2-ylidene-based silver-complexes and their medical applications as potential metallopharmaceutical agents are currently underway by our research group.

*Novel N-Heterocyclic Carbene Silver (I) Complexes: Synthesis, Structural Characterization… DOI: http://dx.doi.org/10.5772/intechopen.101950*
