Static permittivity and molecular interactions in binary mixtures of ethanolamine with alcohols and amides

• Published in: Fluid phase equilibria 2010-06, Vol.293 (2), p.137-140
• Main Authors: Sengwa, R.J., Sankhla, Sonu, Khatri, Vinita, Choudhary, Shobhna
• Format: Article
• Language: English
• Subjects: Alcohols; Alignment; Amides; Amine; Binary mixtures; Chemistry; Dielectric constant; Ethyl alcohol; Ethylene glycol; Exact sciences and technology; General and physical chemistry; Hydrogen-bond interactions; Hydroxyl groups; Permittivity; Solution properties; Solutions; Static permittivity
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2010.02.038

The relative static permittivity at 1 MHz and high frequency limit permittivity at wavelength of sodium-D line of the binary mixtures of ethanolamine (2-aminoethanol) with alcohols (ethyl alcohol, ethylene glycol and glycerol) and amides (formamide, N,N-dimethylformamide and N,N-dimethylacetamide) have been investigated over the entire concentration range at 30 °C. The excess permittivity and Kirkwood correlation factor of the binary mixtures were determined to explore the hydrogen-bonded hetero-molecular interactions and their dependence on the number of hydroxyl groups of alcohols molecules and the extent of substitution in amides molecules. Results confirm that ethanolamine form weak H-bond interactions with alcohols, N,N-dimethylformamide and N,N-dimethylacetamide, but the dipolar alignments in these mixtures vary with number of hydroxyl group of alcohols and their molecular size. Comparatively strong H-bond interactions were found between ethanolamine and formamide molecules with reduce in number of parallel aligned effective dipoles.