Silver(I) clusters of the sterically-hindered bidentate ligand, 3-(dimethylphenyl)silyl-2-pyridinethiol. The crystal and molecular structures of [Ag(SC5H3N-3-SiMe2,Ph)]6 and [Ag8(SC5H3N-3-SiMe2Ph)6][Ag(NO3)2]2·2CH3OH·CH2Cl2

Synthesis and Structure of a Water-Soluble Hexanuclear Silver(I) Nicotinate Cluster Comprised of a “Cyclohexane-Chair”-Type of Framework, Showing Effective Antibacterial and Antifungal Activities: Use of “Sparse Matrix” Techniques for Growing Crystals of Water-Soluble Inorganic Complexes

The synthesis of a water-soluble anionic silver 2-mercaptonicotinate complex having effective antibacterial and antifungal properties is described. Its structure has been confirmed to be a hexameric cluster by an X-ray diffraction analysis of a mixed Na(+)/Tris(+) salt (Tris(+) = tris(hydroxymethyl)methylammonium cation). The [Ag(mna)](6)(6-) cluster has a Ag(6)S(6) core and an overall shape of twisted hexagonal cylinder with six sulfur atoms and six silver atoms alternating on a puckered drum-like surface. Each Ag atom is trigonally coordinated by one N and two S ligands. The overall [Ag(mna)](6)(6-).4Na(+).2[(HOCH(2))(3)CNH(3)](+).10H(2)O complex has a layered appearance in the crystal packing diagram, with a [Ag(mna)](6)(-) cluster layer alternating with a solvent layer consisting of sodium atoms, Tris buffer cations, and water molecules. The structure is almost identical to that of a neutral [Ag(Hmna)](6) complex reported earlier. The neutral and charged complexes are both known to possess antimicrobial activities, and some biological properties of these and related compounds are briefly discussed in this paper.

Synthesis and Structural Characterization of Neutral Silver(I) Complexes with Arenephosphinothiols. Crystal Structures of [Ag(4){2-(Ph(2)P)-6-(Me(3)Si)C(6)H(6)S}(4)] and [Ag(4){2-(Ph(2)PO)-6-(Me(3)Si)C(6)H(3)S}(4)]

Silver complexes of the anionic forms of 2-(diphenylphosphino)benzenethiol [2-(Ph(2)P)C(6)H(4)SH] (1), 2-(diphenylphosphino)-6-(trimethylsilyl)benzenethiol [2-(Ph(2)P)-6-(Me(3)Si)C(6)H(3)SH] (2), and 2-(diphenylphosphinyl)-6-(trimethylsilyl)benzenethiol [2-(Ph(2)PO)-6-(Me(3)Si)C(6)H(3)SH] (3) have been prepared by an electrochemical procedure and characterized by spectroscopic (IR, (1)H, (13)C, and (31)P NMR) methods, and ligand 3 and [Ag(4){2-(Ph(2)P)-6-(Me(3)Si)C(6)H(3)S}(4)] (5) and [Ag(4){2-(Ph(2)PO)-6-(Me(3)Si)C(6)H(3)S}(4)] (6) complexes were characterized by X-ray crystallographic techniques. Crystal data for 3: C(21)H(23)OPSSi, monoclinic, P2(1)/n, a = 11.3730(4) Å, b = 11.1562(4) Å, c = 17.1153(6) Å, beta = 103.961(1) degrees, V = 2107.4(1) Å(3), Z = 4, 2730 reflections with I(o) > 2sigma(I(o)), R = 0.0621. Crystal data for 5: C(84)H(88)Ag(4)P(4)S(4)Si(4), tetragonal, P4(2)2(1)2, a = 18.8454(7) Å, b = 18.8454(7) Å, c = 24.596(2) Å, V = 8735.1(7) Å(3), Z = 4, 4676 reflections with I(o) > 2sigma(I(o)), R = 0.0286. Crystal data for 6: C(90)H(97)Ag(4)N(3)O(4)P(4)S(4)Si(4), trigonal, P1, a = 13.4567(1) Å, b = 14.4148(2) Å, c = 14.8080(2) Å, alpha = 99.130(1) degrees, beta = 98.815(1) degrees, g = 114.211(1) degrees, V = 2509.38(5) Å(3), Z = 1, 6345 reflections with I(o) > 2sigma(I(o)), R = 0.0505. The [Ag(4){2-(Ph(2)P)-6-(Me(3)Si)C(6)H(3)S}(4)] (5) compound is tetranuclear with an array of four silver atoms bridged by four sulfur atoms. Each silver atom has a distorted trigonal [AgS(2)P] environment with each ligand acting as P,S bidentate S-bridging ligand. The [Ag(4)(2-(Ph(2)PO)-6-(Me(3)Si)C(6)H(3)S}(4)] (6) complex is also tetranuclear, but in this case two of the silver atoms are [AgO(2)S(2)] tetracoordinated and the other two Ag atoms are [AgS(2)] two coordinated.