Synthesis and characterization of ruthenium complexes with 1-aryl-2-mercaptoimidazole ligands

Synthesis and structural characterization of ruthenium complexes with 1-aryl-imidazole-2-thione

“…Low-valent ruthenium hydrides can be used as alternatives to conventional Lewis acids and bases [18]; in particular, [RuHCl(CO)(PPh 3 ) 3 ] may catalyze addition of aldehydes to dienes and -alkylation of ketones with primary alcohols [19,20], and [RuH 2 (PPh 3 ) 4 ] may catalyze hydration of nitriles to give the corresponding amides [21]. In the course of our research on ruthenium hydride complexes in electron-rich sulfur coordination environments [22,23], we became interested in reactivity and structural characterization of ruthenium hydride complexes with substituted imidazole-2-thione ligands [24,25]. In this paper, the coordination properties of 1-aryl-imidazole-2-thiones to ruthenium with triphenyl-phosphines as co-ligands along with photo-oxidation of the ruthenium carbonyl complex and ligand-reduction in ruthenium chloride complexes are described.…”

Synthesis and characterization of ruthenium hydride and halide complexes with bis(2-mercapto-1-arylimidazolyl)borate ligands

“…Despite the extensive interest on the coordination chemistry of Tm R and Bm R (R ¼ Me, t Bu) as ligands for metal complexes, there has been limited exploration of the related bis(2-mercapto-1-arylimidazolyl)borate (Bm R ) [20,21] (Chart 1). Recently, we have reported syntheses and characterizations of several ruthenium complexes with 1-aryl-2-mercaptoimidazole ligands [22]. To extend the work, we have synthesized series of sodium salts of bis(2-mercapto-1-arylimidazolyl)borates (NaBm R ) by reactions of 1-aryl-2-mercaptoimidazole and NaBH 4 in refluxing THF [20].…”