Clathrate and inclusion compounds. Part III. The infrared and Raman spectra of some β-quinol (hydroquinone) clathrates
Abstract
The i.r. (4000–200 cm–1) and Raman (3200–50cm–1) spectra of the β-quinol clathrates containing the following guest molecules are reported: Ar, COS, CH3Cl, CH3Br, CH3NC, CH3SH, CH4, C2H6, and C2H4. The preparations of the COS, CH3NC, and CH3SH clathrates have not been reported previously. The Raman spectrum of the CH3NC guest molecule has been interpreted as indicating the loss of the rotational freedom of the guest molecule around the C3 axis. The ν(C–Br) mode of the CH3Br guest molecule gives rise to a Raman band which has a value 9 cm–1higher than the corresponding gas-phase value. This has been interpreted as indicating a compression of the C–Br bond. An interesting correlation has been observed between the size of the guest molecule (and hence the extent of the distortion of the host lattice) and the splitting pattern of the host-lattice Raman bands in the 400–550 cm–1 region.