Hexafluorosilicates with heterocyclic cations are convenient models for the estimation of H-bonds influence on structural characteristics and properties of this onium salts. As a part of our systematic investigation here we describe results of X-ray structure analysis and solubility data determination of the hexafluorosilicates (4,4´-DipyH2)SiF6 (I) and (2-Br-6-CH3C5H3NH)2SiF6·H2O (II)
