Synthesis and Structural Elucidation of Non-Functionalized Symmetrical Tetrakis-Imidazolium Dinuclear Ag(I) Di-N-Heterocyclic Carbene Complex: Sintesis dan Penjelasan Struktur bagi Kompleks Tidak Berfungsi Ag(I) Dwi-N-Heterosiklik Karbena

Abstract

This brief report outlines the synthesis and analysis of symmetrical dinuclear Ag(I) di-N-heterocyclic carbene (NHC) complex, primarily derived from tetrakis-benzimidazolium salt. The symmetrical tetrakis-imidazolium salt was synthesized by reacting 1,2,4,5-tetrakis(bromomethyl)benzene with the imidazole moiety of 1?Br. These salt were then transformed into their respective complex through an in-situ deprotonation reaction with Ag₂O, utilizing different salt-to-metal molar ratio, resulting in the establishment of dinuclear Ag(I) di-NHC complex designated as Ag1. The structures of both the tetrakis-imidazolium (1?Br) salt and the Ag(I) di-NHC complex Ag1 were determined using a combination of spectroscopic techniques (FTIR, ¹H- and ¹³C-NMR), CHN elemental analysis, and single crystal X-ray diffraction. The single crystal X-ray diffraction analysis of the macrocyclic complex Ag1 suggests a crystalline structure resembling a cylinder. Further exploration on the application of the complex could be done in the future on as such the antimicrobial, anticancer, catalysis and many more.