Molecular structure of 2-chlor-5-methyl-1,3,2-oxathiaphospholene in the gaseous phase

A. E. Arbuzov Institute of Organic and Physical Chemistry, Academy of Sciences of the USSR. Translated from Zhurnal Strukturnoi Khimii, Vol. 31, No. 1, pp. 169–173, January–February, 1990.     

Alignment of diatomic molecules by gaseous transport

Iodine molecules in a flow cell containing helium as a carrier gas appear to be partially aligned. This has been determined by comparison of circular polarisation ratios of rotationally resolved emission lines in the flow cell with those obtained from a similar cell containing 1₂ in an isotropic environment. After all other possibilities have been eliminated, two experimental indicators of alignment remain. One is the reduction of the absolute value of the circular polarisation ratio and the other is the differential reduction of one of the P,R-doublet emission lines.     

Studies of gaseous molecules by Raman spectroscopy

Raman spectroscopy of gaseous molecules, while not a routine technique, can provide a useful means of probing selected processes: for example, molecular conformation studies and combustion systems. The Raman trace scattering spectrum, obtainable from a suitable combination of the polarized components of the scattered light, is especially well suited for quantitative measurements.