| Abstract
| - In a series of four silver(I) complexes containing nitrate and ethynide ligands attached to different aromatic rings, intermolecular π−π interaction dominates the assembly of supramolecular synthons Ag4⊂CC−R−CC⊃Ag4 and RCC⊃Ag4 to give infinite columnar structures exhibiting distinct π−π stacking modes.
- In a series of four silver(I) complexes containing nitrate and ethynide ligands attached to different aromatic rings, namely, [Ag2(m-CCC6H4CC)]·5AgNO3·3H2O (1), 2[(AgCC)2-2,3-C4H2S]·10AgNO3 (2), [(AgCC)-3-py]·3AgNO3 (3), and 2[(AgCC)-2-pyz]·6AgNO3·3H2O (4) (py = pyridine; pyz = pyrazine), intermolecular π−π interaction dominates the assembly of supramolecular synthons Ag4⊂CC−R−CC⊃Ag4 and RCC⊃Ag4 to give infinite columnar structures exhibiting distinct π−π stacking modes. The decrease in aromaticity of the ring moieties in 1, 3, and 4 is accompanied by weakened π−π stacking, transforming from the parallel face-to-face mode in 1, through a displaced stacked arrangement in 3, to the edge-to-face contact in 4. Replacement of one ethynide moiety of m-phenylenediethynide ligand in 1 by nitrogen coordination sites on the aromatic ring in 3 and 4 was found to have a limited effect on interrupting the whole π−π stacking infinite column.
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