1476771-00-2Relevant articles and documents
Heterocyclic-2-thione derivatives of silver(I): Synthesis, spectroscopy and structures of mono- and di-nuclear silver(I) halide complexes
Lobana, Tarlok S.,Sultana, Razia,Butcher, Ray J.,Jasinski, Jerry P.,Golen, James A.,Castineiras, Alfonso,Pr?pper, Kevin,Fernandez, Francisco J.,Vega, M. Cristina
, p. 460 - 469 (2013)
The scarcely known chemistry of silver(I) halides with a series of heterocyclic thiones in acetonitrile (or methanol-acetonitrile) is described. Silver(I) chloride with a series of imidazolidine-2-thiones [C3H 5NS(N-R)] in the presence of one equivalent of PPh3 with respect to the thione ligand has yielded chloro-bridged dinuclear complexes, [Ag2(μ-Cl)2(κ1-S-C3H 5NS(N-R))2(PPh3)2] (1, R = H; 2, R = Me; 3, R = Et), and in the presence of two equivalents of PPh3, it has yielded mononuclear complexes, [Ag(κ1-Cl) (κ1-S-C3H5NS(N-R))(PPh3) 2] (4, R = Me; 5, R = Et). The n-propyl-imidazolidine-2-thione with silver(I) chloride formed only a mononuclear complex, [Ag(κ1- Cl)(κ1-S-C3H5NS(N-Prn)) (PPh3)2] (6), in the presence of one or two equivalents of PPh3. In contrast, silver(I) bromide with C3H 5NS(N-R) in the presence of one or two equivalents of PPh3 with respect to the thione ligand has yielded bromide-bridged dinuclear complexes, [Ag2(μ-Br)2(κ1-S-C 3H5NS(N-R))2(PPh3)2] (7, R = Me; 8, R = Et; 9, R = Prn). The related thio-ligands, namely, 1-methyl-imidazoline-2-thione and thiazolidine-2-thione with silver(I) bromide in the presence of one or two equivalents of PPh3 have formed bromide bridged dimeric [Ag2(μ-Br)2(κ1-S- C3H3NS(N-Me))2(PPh3)2] (10) or mononuclear Ag(κ1-Br)(κ1-S-C 3H5NS2)(PPh3)2] (11) complexes respectively. The 2,4-dithiouracil (C4H4N 2S2) with silver(I) chloride/bromide and PPh3 has yielded hetero-bridged dinuclear complexes, [Ag2(μ-S,S-C 4H3N2S2)(μ-X)(PPh 3)4] (X = Cl, 12; Br, 13) involving rupture of Ag-X bonds directly with a thio-ligand, a rare case of such rupture in metal-heterocyclic thione chemistry.
