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3-Methylthiophene is an organosulfur compound with the formula CH 3 C 4 H 3 S. It is a colorless, flammable liquid. It can be produced by sulfidation of 2-methylsuccinate. [1] Like its isomer 2-methylthiophene, its commercial synthesis involvess vapor-phase dehydrogenation of suitable precursors.
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
Density (g cm-3) Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 –5.96 –5.87 K b & K f [1] Lauric acid: 298.9 44 –3.9 Acetic acid: 1.04 117.9 3.14 16.6 –3.90 K b [1] K f [2] Acetone: 0.78 56.2 1.67 –94.8 K b [3] Benzene: 0.87 80.1 2.65 5.5 –5.12 K b & K f [2 ...
The high reactivity of thiophene toward sulfonation is the basis for the separation of thiophene from benzene, which are difficult to separate by distillation due to their similar boiling points (4 °C difference at ambient pressure). Like benzene, thiophene forms an azeotrope with ethanol.
For example, at any given temperature, methyl chloride has the highest vapor pressure of any of the liquids in the chart. It also has the lowest normal boiling point at −24.2 °C (−11.6 °F), which is where the vapor pressure curve of methyl chloride (the blue line) intersects the horizontal pressure line of one atmosphere of absolute vapor ...
2-Methylthiophene is an organosulfur compound with the formula CH 3 C 4 H 3 S. It is a colorless, flammable liquid. It can be produced by Wolff-Kishner reduction of thiophene-2-carboxaldehyde. [1] Its commercial synthesis involvess vapor-phase dehydrogenation of a 1-pentanol/CS 2 mixture. [2]
Both unsubstituted and substituted tetrahydrothiophenes are reported to occur in nature. For example, tetrahydrothiophene occurs as a volatile from Eruca sativa Mill. . (salad rocket) [5] while monocyclic substituted tetrahydrothiophenes have been isolated from Allium fistulosum 'Kujou', [6] Allium sativum (garlic), [7] Allium cepa (onion), [8] Allium schoenoprasum (chives), [9] and Salacia ...
2,5-Dimethylthiophene is an organosulfur compound with the formula C 4 H 2 (CH 3) 2 S. It is one of four isomers of dimethylthiophene. A colorless liquid, it is prepared by sulfurization of hexane-2,5-dione. [1] It is approved as a food flavouring additive in Europe. [2]