Isotopic thermal diffusion of carbon disulfide in the liquid phase

Abstract

Thermal diffusion factors were measured for several isotopically substituted pairs of carbon disulfide molecules. The effect of a unit mass increment at the carbon position in the molecule was found to be substantially less than the effect of a unit mass substitution at one of the sulfur positions. The results were represented within experimental accuracy by αTij=2.20 (mi-mj)/(mi+m j)+1.67(Ii-Ij)/(Ii+Ij), where αTij is the isotopic thermal diffusion factor, m i and mj are the molecular masses, and Ii and Ij are the second moments. © 1986 American Institute of Physics.