Premium
Tracer diffusion of carbon tetrachloride, S‐trioxane, 12‐crown‐4, 15‐crown‐5, 18‐crown‐6 in acetonitrile, benzene, and chlorobenzene
Author(s) -
Yumet Eduardo,
Chen HangChang,
Chen ShawHorng
Publication year - 1985
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690310108
Subject(s) - chemistry , chlorobenzene , acetonitrile , diffusion , solvent , benzene , tracer , trioxane , analytical chemistry (journal) , inorganic chemistry , organic chemistry , thermodynamics , physics , polymer , nuclear physics , copolymer , catalysis
Tracer diffusivities measured with the Taylor dispersion technique are reported for carbon tetrachloride, s‐trioxane, 12‐crown‐4, 15‐crown‐5, and 18‐crown‐6 in acetonitrile, benzene, and chlorobenzene across ranges of temperature. It is demonstrated that Stokes' law corrected with a microfriction factor successfully accounts for the diffusion behavior of even disk‐shaped crown ethers. Solute and solvent molecules being effectively spherical in the context of Stokes' law, the tracer diffusion of crown ethers is found to be satisfactorily represented by a rough‐hard‐sphere model for molecular diffusion. The degree of success increases with decreasing solvent polarity. The diffusion data for carbon tetrachloride are also used to extend the basis of the recently developed reduced equation for the tracer diffusion of nonelectrolytes in liquids over wide temperature ranges.