Knowledge Bank

The factor group splittings in the vibrational spectra of crystalline phenol ate resolved and interpreted on the basis of the pseudo-orthorhombic symmetry of the space group. The crystal frequencies are classified into symmetry species $B1u,B2u$ and $B3u$ of the $D2$ factor group having dipole moment vectors along the crystal axes a, b, and c respectively. The relation between the polarization behaviour of the multiplet components and symmetry species of the molecular modes has been established. Implication of this correlation on the vibrational of the phenol spectra will be discussed in the following talk.