Ubiquitous T-shaped isomers of OCS-hydrocarbon van der Waals complexes.

Many weakly bound OCS-hydrocarbon complexes exhibit a relatively simple rotation-vibration band, characteristic of a T-shaped structure, which is redshifted (by 5–12 cm^-1) from the OCS monomer ν₁ frequency. Spectra of OCS with seven chain and ring hydrocarbons are described here. They allow a straightforward comparison of intermolecular force effects (vibrational shift and intermolecular separation) over a range of molecules, which could be extended to other hydrocarbons and other probes such as CO₂ and N₂O. [ABSTRACT FROM AUTHOR]