A combined structural, vibrational specttoscopy, and solid-state DFT study of the hydrogen-bonded complex of bromanilic acid with 2,6-dimethylpyrazine, is reported. The crystallographic structure was determined by means of low- temperatute single-crystal X-ray diffraction, which reveals the molecular units in their native protonation states, forming, one- dimensional infinite nets of moderate-strength O center dot center dot center dot H-N hydrogen bonds. The nature of the crystallographic forces, stabilizing the studied structure, has been drawn by employing the noncovalent interactions analysis,. It Was found - that, in addition to the hydrogen bonding the intermolecular forces are dominated by stacking interactions and C-H center dot center dot center dot O contacts. The thermal and calorimetric analysis was employed to probe stability of the crystal phase. The structural analysis was further supported by a computationally assisted C-13 CP/MAS NMR study, providing a complete assignment of the recorded resonances. The vibrational, dynamics was explored by combining the,optical (IR, Raman; TDs-THz) and inelastic neutron scattering -(INS) spectroscopy techniques with the state-of-the-art solid-state density functional theory (DFT) computations. Despite the quasi-harmonic approximation assumed throughout the study, an excellent agreement between the theoretical and experimental data was achieved over the entire spectral range, allowing for a deep and possibly thorough understanding of the vibrational characteristics of the system. Particularly, the significant influence of the long-range dipole coupling on the IR spectrum has been revealed. On the basis of a wealth of information gathered, the recent implementation of a dispersion-corrected linear-response scheme has been extensively examined.