Molecular strands and related properties of silver(I) triflate with 3,3'-oxybispyridine vs 3,3'-thiobispyridine

Abstract

Studies on subtle spacer ligand effects of AgCF3SO3 with 3,3'-Py2X (X = O vs S) have been carried out. The reaction of AgCF3SO3 with 3,3'-PY2O and 3,3'-Py2S produces [Ag(CF3SO3)(3,3'-Py2O)] and [Ag(3,3'-Py2S)] (CF3SO3), respectively. Crystallographic characterization of [Ag(CF3SO3)(3,3'-Py2O)] (monoclinic P (1) over bar, a = 8.405(2) Angstrom, b = 10.714(2) Angstrom, c = 18.031(2) Angstrom, alpha = 77.36(2), beta = 107.83(2)degrees, gamma = 66.92(2), V = 1438.0(5) Angstrom(3), Z = 2, R = 0.0486) reveals that the skeletal structure is an anion-bridged double-strand. The double-strands are packed like a plywood. The framework of [Ag(3,3'-Py2S)](CF3SO3) (orthorhombic Pcab, a = 17.330(2) Angstrom, b = 8.640(1) Angstrom, c = 19.933(6) Angstrom, V = 2985(1) Angstrom(3), Z = 8, R = 0.0437) is a sinusoidal single-strand. The formation of each coordination polymer appears to be primarily associated with the donating ability and the conformational energy barrier of the spacer ligands. Thermal analyses indicate that [Ag(CF3SO3)(3,3'-Py2O)] and [Ag(3,3'-Py2S)](CF3SO3) are stable up to 250 degreesC and 210 degreesC, respectively. For the anion exchangeability, the nature of the spacer ligand is more significant factor than the distance of silver(I)(...)triflate.