Solubility, density and refractive index of formamide/N-methylformamide/N, N-dimethylformamide + Rb2SO4 + H2O ternary systems at 283.2, 298.2 and 313.2 K

This experiment uses a research grade Raman microscope system to measure the energy difference between the higher energy cisand lower energy trans-isomers of N-methylformamide (NMF). The experimental portion of this work involves measuring the intensities of key Raman bands associated with each of the two isomeric forms of NMF as a function of the temperature. A van't Hoff plot showing the temperature dependence of the equilibrium is used to estimate the standard change in enthalpy (ΔH°) for the reaction. A value of 5.90 ± 0.15 kJ/mol (95% C.I.) for the isomerization of trans to cis was obtained for a set of example data reported. An average over multiple semesters and multiple experimental groups was 6.65 ± 0.86 kJ/mol (s.d.). This compares to four experimental literature values ranging from 3.71−7.44 kJ/mol.

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Solubility, density and refractive index of formamide/N-methylformamide/N, N-dimethylformamide + Rb2SO4 + H2O ternary systems at 283.2, 298.2 and 313.2 K

Cited by 2 publications

References 24 publications

Solid-Liquid Equilibria of Ternary Systems LiBr + NaBr + Methanol, LiBr + KBr + Methanol, and NaBr + KBr + Methanol at 288.2 K and Molecular Modeling Predicted by EOS-Based DFT

Solid-Liquid Equilibria of Ternary Systems LiBr + NaBr + Methanol, LiBr + KBr + Methanol, and NaBr + KBr + Methanol at 288.2 K and Molecular Modeling Predicted by EOS-Based DFT

Raman Spectroscopy Determination of ΔH° for the Cis/Trans Isomerization of N-Methylformamide in the Physical Chemistry Laboratory

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