Silver(I) interaction and complexation with sterically hindered sulfur-containing diphenol derivatives

Synthesis and antimicrobial activities of silver(i) sulfanylcarboxylates. Structural isomers with identically or unequally coordinated Ag centers in an Ag4S4ring

“…•H 2 O. These complexes (16)(17)(18)(19) were prepared by adding NaOH to a suspension of the appropriate [Ag(HL)] complex in water. The mixture was stirred at room temperature for 24 h and the solution was passed through a folded filter paper (Whatman No.…”

Synthesis of novel gold(I) complexes derived by AgCl-elimination between [AuCl(PPh3)] and silver(I) heterocyclic carboxylates, and their antimicrobial activities. Molecular structure of [Au(R,S-Hpyrrld)(PPh3)] (H2pyrrld = 2-pyrrolidone-5-carboxylic acid)

“…In bioinorganic chemistry of coinage metal(I) complexes, there have been reported various studies of gold(I) complexes related to their antiarthritic [1][2][3], antitumor [2][3][4][5][6], anti-HIV [2,3] and antimicrobial activities [7][8][9][10][11][12] and those of silver(I) complexes related to their antiethylene [13][14][15], antimicrobial [16][17][18][19][20][21][22][23][24], antitumor [25] and antiviral activities [26,27]. The molecular design of such silver(I) and gold(I) complexes is an intriguing aspect of the bioinorganic chemistry of metal-based drugs.…”

Copper (II) complexes of sterically hindered o-diphenol derivatives: synthesis, characterization and microbiological studies

“…investigation showed that most of the metal complexes formed with sterically hindered diphenol and aminophenol derivatives containing one or two tert-butyl groups were hard to crystallize [30,[32][33][34]. Therefore, our determination of the coordination modes of the Cu (II) complexes was based on other physicochemical methods.…”

“…Based on our previous findings [30,31], preferential formation of the Cu (II):L=1:2 complex was achieved by adding a solution of Cu (II) salt in small portions to the ligand solution under continuous stirring, so that the complexation always took place with excess ligand present. The preparations followed a common procedure.…”

“…We have earlier reported the synthesis of an Ag (I) complex with one of the ligands, 2-[4,6-di(tert-butyl)-2,3-dihydroxyphenylsulfanyl]acetic acid. Since Ag (I) complexation leads to enhanced antimicrobial activity of this ligand [30], we were motivated to explore whether Cu (II) complexes of the SHD derivatives behave similarly.…”