Non-spherical atom refinement applied in structure determination of ▫$(N_2H_6)(H_3F_4)_2$▫ and crystal structure re-determination of ▫$N_2H_6F_2$▫

Hydrazinium trihydrogen tetrafluoride was synthesized and its structure investigated. Its crystal structure, determined by single-crystal X-ray diffraction, consists of N2H62+ dications and trigonal H3F4– anions interconnected via a complex system of N–H···F hydrogen bonds. The crystal structure of hydrazinium fluoride was redetermined. For more accurate determination of hydrogen atoms positions, non-spherical atom refinement was performed for both structures.