title: Sulfonate- or carboxylate-functionalized N-heterocyclic bis-carbene ligands and related water soluble silver complexes.
abstract: New N-heterocyclic carbene ligand precursors {H(2)C(HTz(R))(2)} and {H(2)C(HIm(R))(2)} (HTz = 1,2,4-triazole; HIm = imidazole; R = PrSO(3) or EtCOO) were obtained starting from the compounds bis(1,2,4-triazol-1-yl)methane and bis(imidazol-1-yl)methane. The related silver(i) carbene complexes were prepared in degassed water solution by treatment of the triazolium or imidazolium species with Ag(2)O, resulting in well-characterized and water soluble bimetallic complexes of general formula {Na(2)[H(2)C(Tz(R))(2)](2)Ag(2)} and {Na(2)[H(2)C(Im(R))(2)](2)Ag(2)}. In these metallacycles every silver atom is coordinated to two triazolin- or imidazolin-2-ylidene rings, belonging to two different dicarbene units.
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Camerino, Via S. Agostino 1, 62032, Camerino, (MC), Italy.
authors.forename: Grazia
authors.initials: G
authors.lastname: Papini
authors.forename: Maura
authors.initials: M
authors.lastname: Pellei
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Gioia Lobbia
authors.forename: Alfredo
authors.initials: A
authors.lastname: Burini
authors.forename: Carlo
authors.initials: C
authors.lastname: Santini
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D008024:Ligands; D008697:Methane / Q000031:analogs & derivatives* / Q000737:chemistry; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D012995:Solubility; D013237:Stereoisomerism; D013451:Sulfonic Acids / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D002264:Carboxylic Acids; D006571:Heterocyclic Compounds; D008024:Ligands; D009942:Organometallic Compounds; D013451:Sulfonic Acids; D014867:Water; C030011:carbene; D012834:Silver; D008697:Methane