title: A thiosemicarbazone ligand functionalized by a phosphine group: reactivity toward coinage metal ions.
abstract: The reactivity of the phosphino-thiosemicarbazone ligand 2-(2-(diphenylphosphino)benzylidene)-N-ethylthiosemicarbazone (HLPEt) toward M(I) halides (M = Cu, Ag, Au) was studied. The complexes obtained, with formulae [Cu(HLPEt)(2)]Br (1), [Cu(HLPEt)(2)]I.2H(2)O (2), [Ag(HLPEt)(LPEt)].3H(2)O (3), [Au(2)(HLPEt)(2)Cl]Cl.CH(3)OH (4) were satisfactorily characterized by elemental analysis, IR, ESI and (1)H/(31)P NMR. Moreover, we have obtained the crystal structure of the ligand HLPEt and its sulfide oxidized form HLP(S)Et, which represents a new case of desulfurization process in thiosemicarbazone ligands. In addition, we present the crystal structure of the complexes 1 + H(2)O + 3MeOH and [Au(2)(HLPEt)(4)Cl]Cl.3CH(3)OH (5), together with their interesting crystal packing. The complex 5 is an interesting case of a pseudo-chloronium gold(I) complex. The ligand HLPEt and the complexes 3 and 4 display intense luminescence at room temperature.
authors.affiliation: Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Castiñeiras
authors.forename: Rosa
authors.initials: R
authors.lastname: Pedrido
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D007477:Ions / Q000737:chemistry*; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D010720:Phosphines / Q000737:chemistry*; D013053:Spectrophotometry; D013882:Thiosemicarbazones / Q000737:chemistry*
chemical_list: C550756:2-(2-(diphenylphosphino)benzylidene)-N-ethylthiosemicarbazone; D056831:Coordination Complexes; D007477:Ions; D008024:Ligands; D008670:Metals; D010720:Phosphines; D013882:Thiosemicarbazones; C044646:phosphine