Gold(I) coordination compounds with mesoionic thiolate ligands and the crystal and molecular structure of bis(1, 4, 5-trimethyl-1, 2, 4-triazolium-3-thiolate)gold (I) tetrafluoroborate

摘要

Two-coordinate gold (I) complexes involving mesoionic thiolate ligands have been synthesized, including homoleptic and mixed-ligand complexes. Many of these compounds have stability and solubility properties that are desirable for practical use as gold sensitizers for photographic silver halide dispersions. The crystal structure of bis(1, 4, 5-trimethyl-1, 2, 4-triazolium-3-thiolate) gold (I) tetrafluoroborate has been solved by single-crystal X-ray diffraction. Several structural parameters support the view that the mesoionic ligands possess substantial thiolate character as a result of the unusual conjugation present in these heterocyclic compounds.