Effect of synthetic conditions on the structures of silver(I)-hexamethylenetetramine coordination polymers: crystal structures of two three-dimensional frameworks featuring new topological motifs
2003; Elsevier BV; Volume: 172; Issue: 1 Linguagem: Inglês
10.1016/s0022-4596(02)00089-0
ISSN1095-726X
AutoresShao‐Liang Zheng, Jie‐Peng Zhang, Xiao‐Ming Chen, Seik-Weng Ng,
Tópico(s)Crystal structures of chemical compounds
ResumoTwo novel coordination complexes, [Ag3(μ4-hmt)2(μ-ssa)(H2O)](NO3)·3H2O 1, and [Ag8(μ3-hmt)2(μ4-hmt)2(μ-pma)2(μ-H2O)3]·18H2O 2 (hmt=hexamethylenetetramine, ssa=sulfosalicylate and pma=1,2,4,5-benzenetetracarboxylate), have been prepared and structurally characterized. Crystal data: 1 C19H33Ag3N9O13S, orthorhombic, Pna21, a=20.483(7) Å, b=21.890(1) Å, c=6.493(2) Å, V=2911.3(13) Å3, Z=4; 2 C44H94Ag8N16O37, monoclinic, C2/c, a=32.099(10) Å, b=12.916(3) Å, c=21.431(8) Å, β=126.74(1)°, V=7120(4) Å3, Z=4. Both complexes exhibit unprecedented and different topological motifs of Ag-hmt networks. Complex 1 is a novel three-dimensional cationic network with two types of channels, in which the larger one is the largest one in Ag-hmt networks; while 2 is a three-dimensional network with cylindrical channels, consisting of mixed μ3- and μ4-hmt ligands. The results demonstrate that under different synthetic conditions, such as the presence of multiple small counter anions or different pH values, different Ag-hmt linkages may be formed to generate new three-dimensional networks.
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