A. Aprea, V. Colombo, S. Galli
May 1, 2010
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0
Influential Citations
13
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Journal
Solid State Sciences
Abstract
Abstract Thiazolo[5,4-d]thiazole-2,5-dicarboxylic acid, C 6 H 2 N 2 O 4 S 2 , was isolated as a polycrystalline material, and its crystal structure was determined by ab-initio X-ray powder diffraction (XRPD) methods. This species, upon deprotonation, was subsequently used in preparing the new coordination polymers Ag 2 (C 6 N 2 O 4 S 2 ), Mn(C 6 N 2 O 4 S 2 )(H 2 O) 2 , Co(C 6 N 2 O 4 S 2 )(H 2 O) 2 , Cu(C 6 N 2 O 4 S 2 )(H 2 O) and Zn(C 6 N 2 O 4 S 2 )(H 2 O) 2 , fully characterized by analytical, thermal and XRPD structural methods – including in situ thermodiffractometry and simultaneous TGA and DSC. In the first-row transition metal derivatives, the [C 6 N 2 O 4 S 2 ] 2− anion systematically prefers the N , O -chelating, vs. the expected O , O ′-bridging, coordination mode, not allowing the formation of porous 3D frameworks. Indeed, these species are dense 1D coordination polymers. At variance, the silver derivative possesses a complex, dense 3D framework, due to the presence of μ 6 -[C 6 N 2 O 4 S 2 ] 2− ligands showing two μ 2 -bridging carboxylates and two monohapto N -donor sites. When dehydration is viable, materials of E n (C 6 N 2 O 4 S 2 ) formulation are irreversibly recovered ( n = 1 for E = Mn, Co, Zn, Cu; n = 2, for E = H).