Terahertz absorption spectra of benzene-1,2-diol, benzene-1,3-diol and benzene-1,4-diol

► Terahertz spectra (8-128 cm−1) of benzene-1,2-diol, benzene-1,3-diol, benzene-1,4-diol. ► Three isomers are clearly distinguished. ► Solid state density functional theory to compute. ► The good spectral reproduction of benzene-1,2-diol and benzene-1,3-diol has been achieved.