Silver

Oxidation of an o-aminophenol-derived Schiff-base component of a binucleating ligand to a benzoxazole and the crystal structures of a mononuclear palladium derivative and a tetranuclear [palladium-silver] Pd2Ag2 derivative with an unusually short silver-silver distance

“…In the IR spectrum of the product there was no trace of the Vq, at 1650 cm"1 of the carbamoyl group of III and acetate-derived bands at 1410 and 1550 cnr'fi'ocoísym) and -(asym), respectively) were indicative of the three-atom bridging mode, PdOCOPd. 5 The NMR spectrum (CDC13) of LPd2(CH3C02) showed the acetate protons as a singlet at 1.98 ppm and indicated a symmetrical structure with equivalent ligand side arms; e.g., the two imine protons gave a single peak at 8.25 ppm. It was not (5) (a) Louey, M.; Nichols, P. D.; Robson, R. Inorg.…”

“…5 The NMR spectrum (CDC13) of LPd2(CH3C02) showed the acetate protons as a singlet at 1.98 ppm and indicated a symmetrical structure with equivalent ligand side arms; e.g., the two imine protons gave a single peak at 8.25 ppm. It was not (5) (a) Louey, M.; Nichols, P. D.; Robson, R. Inorg. Chim.…”

“…The bond lengths in the P2Ag2Cl2 core are Ag-P = 2.504 (3), 2.525 (4), Ag-Cl = 2.643 (3), 2.634 (4), and Ag---Ag = 3.750 A, and the bond angles are Ag-Cl-Ag = 90.5 (1), Cl-Ag-Cl = 89.4 (1), P-Ag-Cl = 108.5 (1), 122.4 (1), 121.5 (1), 102.6 (1), and P-Ag-P = 111. 5 (1)°. The Ag2Cl2 unit in this complex is thus almost perfectly square, with a difference of less than 0.01 A between the symmetrically inequivalent Ag-Cl bond lengths.…”

Synthesis, crystal structure and spectral studies of silver(I) cyclohexyldiphenylphosphine complexes: towards the biological evaluation on malignant and non-malignant cells

“…The geometry of these complexes depends on the metal-to-ligand ratios, the counter ion present, and the solvent being used [41][42][43][44][45]. Tertiary phosphine complexes of silver(I) of the type [AgXLn], where L = tertiary phosphine, n = 1-4, and X = coordinating or non-coordinating anion, were first prepared as early as 1937, and several publications have resulted on this topic [46][47][48][49][50]. The reaction of silver(I) salts with monodentate tertiary phosphines in a 1:2 stoichiometric ratio generally results in the formation of either monomeric [AgX(PR3)2]/[Ag(PR3)2]X [51][52][53][54][55][56][57][58][59][60][61] or dimeric complexes [AgX(PR3)2]2 [61][62][63] depending on the donor properties of the phosphine ligand, the bulkiness of the ligand, and the donor properties of the anion.…”