LAUSR

Abstract In this study, the liquid structures of six binary systems containing methylpropanone (MP) and n-alkanol (1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol) at 293.15 K to 323.15 K were investigated regarding the molecular diffusion coefficient D , thermal diffusion coefficient D T , Soret coefficient S T , and the separation ratio ψ . The molecular interactions in binary mixtures were explained by the calculated parameters. Formation of dipole–dipole interactions and the hydrogen bond among unlike molecules in the binary mixtures have been identified. The Soret coefficient S T of methylpropanone is positive and indicates that this molecule is enriched in the colder regions of the liquids. These parameters were discussed concerning the nature of various molecular interactions in binary mixtures. Obtained values demonstrate that increasing the chain length of alcohol enhances its tendency to move to the warmer regions. This behavior means that molecular interactions are decreased with the alcohol chain length.