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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 8
BKCSDE 23(8)
August 20, 2002 

 
Title
Molecular Strands and Related Properties of Silver(I) Triflate with 3,3’-Oxybispyridine vs 3,3’-Thiobispyridine
Author
Yun Ju Kim, Young-A Lee, Ki-Min Park, Hee K. Chae, Ok-Sang Jung
Keywords
Strands, Coordination polymers, Silver(I) complexes, Bipyridines, Anion exchange
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 P1, a =8.405(2) Å, b = 10.714(2) Å, c = 18.031(2) Å, α= 77.36(2), β= 107.83(2)°, γ= 66.92(2), V = 1438.0(5) Å3 , 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) Å, b = 8.640(1) Å, c = 19.933(6) Å, V = 2985(1) Å3 , 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 confor ma-tional 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 ℃ and 210 ℃, respectively. For the anion exchangeability, the nature of the spacer ligand is more significant factor than the distance of silver(Ⅰ)···triflate.
Page
1106 - 1110
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