Synthesis and Structural Study of Some Pyrimidinium Hexafluoridosilicates

摘要

The synthesis and spectroscopic characterization of some pyrimidinium hexafluoridosilicate salts with the formula (RH)(2)[SiF](6) (where R = 2-aminopyrimidine (1), cytosine (2) and 5-cyanocytosine (3)) is obtained in the reaction of SiO, with hydrofluoric acid solution and subsequent addition of 2-aminopyrimidine, cytosine or 4-amino-2-chloropyrimidine-5-carbonitrile. The crystal structures of 1 and 3 have been determined by single-crystal X-ray diffraction analysis. The combination of N-H center dot center dot center dot F hydrogen bonds along with pi-pi interactions between aromatic rings resulted in supramolecular architecture of cations and anions in the solid state.