Article,

New chlorine bridged binuclear silver(I) complexes of bidentate phosphorus ylides: Synthesis, spectroscopy, theoretical and anti-bacterial studies

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POLYHEDRON, (January 2015)
DOI: {10.1016/j.poly.2014.09.030}

Abstract

Silver(I) halides react with bidentate phosphorus ylides of the type Ph2P(CH2)(n)PPh2=(H)C(O)C6H4R (n = 1,2) (R = 4-Cl (Y-1, Y-5), 4-Br (Y-2, Y-6), 4-NO2 (Y-3, Y-7), 4-OMe (Y-4, Y-8)) in CH3CN as a solvent in equimolar ratios to give complexes of the formulae (Ph2P(CH2)(n)PPh2C(H)C(O)C6H4R)AgX(2) (X = Cl (1, 4, 7, 10, 13, 16, 19, 22), Br (2, 5, 8, 11, 14, 17, 20, 23) and 1(3, 6, 9, 12, 15, 18, 21, 24)). X-ray analysis demonstrate a binuclear chloro-bridged structure (Y-Ag(mu-Cl)(2)Ag-Y) in which the ligand coordinates to the silver center through the P atom in complexes 1 and 10. However, both the theoretical and experimental data indicate that the ylidic carbon also has a weak interaction with the Ag ion. Characterization of the obtained compounds was performed by elemental analysis, IR, H-1, P-31 and C-13 NMR spectroscopy. In addition, the DMSO dissolved ligands and their complexes were screened in vitro for their antibacterial activity against 6 Gram positive and negative bacteria. All the synthesized compounds exhibited significant activity, especially against Gram negative bacteria. (C) 2014 Elsevier Ltd. All rights reserved.

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