Crystal structure and ion mobility in the antimony(III) fluoride complex with glycine 2SbF3•(C2H5NO2)

The complex of antimony(III) fluoride with glycine 2SbF(3)center dot(C2H5NO2) (I) has been synthesized and investigated by X-ray, and F-19, H-1 NMR methods. The structure of I is formed by the molecular 2SbF(3)center dot(C2H5NO2)SbF3 groups linked through Sb center dot center dot center dot F secondary bonds into polymer layers parallel to the (bc) plane. The longer Sb center dot center dot center dot F bonds (2.674-3.354 angstrom) and the N-H center dot center dot center dot F and C-H center dot center dot center dot F hydrogen bonds link the layers into a three-dimensional framework. The character of ionic motions in fluoride and proton sublattices upon temperature variations in the range 150-435 K has been examined, and their types and temperature ranges, within which they are realized, have been determined. It has been established that ion diffusion in both sublattices of I is observed in the temperature range 400-435 K, and the mechanisms of its emergence are proposed.