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Keywords:

  • coordination modes;
  • coordination polymers;
  • salt effect;
  • silver;
  • X-ray diffraction

Abstract

Differently substituted p-cyanophenylsilanes, Me4−nSi(C6H4CN)n, (n=2, 3, 4), PhSi(C6H4CN)3, cycHexSi(C6H4CN)3 (cycHex=cyclohexyl), and MePhSi(C6H4CN)2, were prepared and fully characterized. Their coordination behavior was studied by utilizing silver salts of the type AgX (X=O3SCF3, CO2CF3), which led to coordination polymers. One-dimensional chains were observed for the bidentate p-cyanophenylsilane ligands, whereas two- and three-dimensional networks, including macrometalacycles, were found for the tridentate ligand. Treatment of AgO2CCF3 with the tetradentate ligand Si(C6H4CN)4 led to the formation of a diamond-like three-dimensional network with two interpenetrating nets linked by bridging Ag2(CF3CO2)2 dimers. X-ray structures show a wide range of close Ag⋅⋅⋅Ag distances in the polymers, which are dependent on the ligand and the anion utilized.