Synthesis, characterization and X-ray crystal structure of [Ag(Htsa)(PPh3)3] (H2tsa=o-HS(C6H4)CO2H). Comparison with [Au(Htsa)(PPh3)]

Abstract A novel, monomeric triphenylphosphine silver(I) complex [Ag(Htsa)(PPh 3 ) 3 ] (H 2 tsa= o -HS(C 6 H 4 )CO 2 H) was synthesized from three different ligand-exchange reactions, as 3 without any solvate or as 3a with CH 2 Cl 2 solvate, in good yield. The complex 3 can be interconverted with the previously obtained, two antimicrobially-active silver(I) thiosalicylates; one was the oligomeric, water-soluble complex {Na[Ag(tsa)] · H 2 O} n , 1 ( n =21–27) and the other the polymeric, water-insoluble complex [Ag(Htsa)] n , 2. The analogous gold(I) complex [Au(Htsa)(PPh 3 )], 4, was also isolated. The complexes 3, 3a and 4 were characterized with complete elemental analyses, TG\DTA, FT-IR and multinuclear NMR ( 1 H, 13 C, 31 P and 10 ;Ag) spectroscopies. The crystal structures of 3 and 4 were determined with single-crystal X-ray diffraction. The monomeric structure for 3 and the dimeric structure via hydrogen bonds of the carboxylic acid for 4 in the solid state were found.