title: One-dimensional coordination polymers incorporating silver(I) perfluorocarboxylate cuboctahedral clusters and the bis(methylthio)methane ligand.
abstract: Two topologically comparable complexes, [Ag6(CF3CO2)3(L1-Me)3(SCH3)3]infinity (1) and [Ag6(CF3CF2CO2)3(L1-Me)2(SCH3)3(H2O)]infinity (2), were prepared and characterized by single-crystal diffractometry. The structures consist of Ag12S6 clusters linked by bis(methylthio)methane ligands, L1-Me, thus forming 1D coordination polymers. The 12 Ag atoms of the cluster are situated at the corners of a distorted cuboctahedron. The sulfur atoms of the six mu4-SCH3 entities occupy a position approximately 0.8 A above the center of each of the square faces of the polyhedron. The cleavage of the C-S bond of some of the ligands occurs during the syntheses, producing the -SCH3 anions. The coordination of the silver atoms varies from 5 to 7. The Ag...Ag contacts range from 2.9250(5) to 3.3615(6) A and from 2.961(1) to 3.380(1) A for 1 and 2, respectively. A polymeric ribbon is obtained when four ligands link a given cluster to two others. The chains of 1, held only by van der Waals forces, pack in a hexagonal manner. The two water molecules in 2 (Ag-OH2 = 2.385(7) A) are coordinated to silver atoms of the cluster. They are also strongly hydrogen bonded to the oxygen atoms of two pentafluoropropionate groups, one within the cluster (O...O = 2.741(1) A), the other in an adjacent chain (O...O = 2.818(1) A). The chains, thus H bonded to one another, generate a 2D coordination network.
authors.affiliation: Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Québec, Canada H3C 3J7.
authors.forename: Mohamed Osman
authors.initials: MO
authors.lastname: Awaleh
authors.forename: Antonella
authors.initials: A
authors.lastname: Badia
authors.forename: François
authors.initials: F
authors.lastname: Brisse
mesh_terms: D018360:Crystallography, X-Ray; D005466:Fluorocarbons / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*; D014269:Trifluoroacetic Acid / Q000737:chemistry*
chemical_list: D005466:Fluorocarbons; D008024:Ligands; D009942:Organometallic Compounds; D011108:Polymers; D013440:Sulfides; C474468:bis(methylthio)methane; D012834:Silver; C033093:perfluoropropionic acid; D014269:Trifluoroacetic Acid