SYNTHESIS AND STRUCTURAL ELUCIDATION OF SYMMETRICAL TETRAKIS-IMIDAZOLIUM DINUCLEAR SILVER(I) DI-N-HETEROCYCLIC CARBENE COMPLEX

Journal: Acta Chemica Malaysia (ACMY)
Author:Muhammad Zulhelmi Nazri and Mohd Rizal Razali
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.01.2024.13.18

This brief report outlines the synthesis and analysis of symmetrical dinuclear Ag(I) di-N-heterocyclic carbene (NHC) complexes, primarily derived from tetrakis-benzimidazolium salts. The symmetrical tetrakis-imidazolium salt was synthesized by reacting 1,2,4,5-tetrakis(bromomethyl)benzene with the imidazole moiety of 1‧Br. These salts were then transformed into their respective complexes through an in-situ deprotonation reaction with Ag2O, utilizing different salt-to-metal molar ratios, resulting in the establishment of dinuclear Ag(I) di-NHC complexes designated as Ag1. The structures of both the tetrakis-imidazolium (1‧Br) salts 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.