Bis-Tetrapropylammonium tetrabromozincate was synthesized and characterized by X-ray powder diffraction, as well as vibrational and impedance spectroscopy. Rietveld’s refinement of X-ray diffractogram confirmed the crystallization of the compound through the monoclinic system (space group ${\text{C}}_{2/c})$. A temperature study of Raman scattering revealed two phase transitions at approximately $T_1$ = 340 K and $T_2$ = 393 K. The wavenumber and the line width’s evolution as a function of temperature showed some peculiarities associated with these transitions, which suggests that they are governed by the reorientation of the organic part [N(C₃${\text{H}}_7{)}_4$]${}^{+}$. The complex impedance plotted as a double semicircular arc in the studied temperature range and the centers of these semicircles lie below the real axis, which indicates that the material is an on-Debye type. These semicircular arcs are related to the bulk and the grain boundary effects. Furthermore, the alternating current conductivity of [N(C₃${\text{H}}_7{)}_4$]₂ZnBr₄ obeyed Jonscher’s law: ${\sigma }_{AC}(\omega )$ = ${\sigma }_{dc}+A{\omega }^s$ and the conduction could be attributed to the correlated barrier hopping (CBH) model in both region(I) and (II) and the Non-overlapping Small Polaron Tunneling (NSPT) in region (III).Bis-Tetrapropylammonium tetrabromozincate was synthesized and characterized by X-ray powder diffraction, as well as vibrational and impedance spectroscopy. Rietveld’s refinement of X-ray diffractogram confirmed the crystallization of the compound through the monoclinic system (space group ${\text{C}}_{2/c})$. A temperature study of Raman scattering revealed two phase transitions at approximately $T_1$ = 340 K and $T_2$ = 393 K. The wavenumber and the line width’s evolution as a function of temperature showed some peculiarities associated with these transitions, which suggests that they are governed by the reorientation of the organic part [N(C₃${\text{H}}_7{)}_4$]${}^{+}$. The complex impedance plotted as a double semicircular arc in the studied temperature range and the centers of these semicircles lie below the real axis, which indicates that the material is an on-Debye type. These semicircular arcs are related to the bulk and the grain boundary effects. Furthermore, the alternating current conductivity of [N(C₃${\text{H}}_7{)}_4$]₂ZnBr₄ obeyed Jonscher’s law: ${\sigma }_{AC}(\omega )$ = ${\sigma }_{dc}+A{\omega }^s$ and the conduction could be attributed to the correlated barrier hopping (CBH) model in both region(I) and (II) and the Non-overlapping Small Polaron Tunneling (NSPT) in region (III).