Thermochemistry of substituted thiophenecarbonitrile derivatives was written by Ribeiro da Silva, Manuel A. V.;Santos, Ana Filipa L. O. M.. And the article was included in Journal of Chemical Thermodynamics in 2008.Electric Literature of C6H5NS This article mentions the following:
The standard (p° = 0.1 MPa) molar energies of combustion in oxygen of 2-thiophenecarbonitrile, 3-thiophenecarbonitrile, 2-thiopheneacetonitrile, 3-thiopheneacetonitrile, and 3-methyl-2-thiophenecarbonitrile were measured, at T = 298.15 K, by rotating-bomb calorimetry. The standard molar enthalpies of vaporization of these compounds at T = 298.15 K were determined using high temperature Calvet microcalorimetry. These values were used to derive the standard molar enthalpies of formation of the title compounds in their crystalline and gaseous phases. The standard molar enthalpies of formation for the title compounds in the gaseous state were derived and the results are interpreted in terms of structural effects. In the experiment, the researchers used many compounds, for example, 3-Methylthiophene-2-carbonitrile (cas: 55406-13-8Electric Literature of C6H5NS).
3-Methylthiophene-2-carbonitrile (cas: 55406-13-8) belongs to nitriles. Nitriles are polar, as indicated by high dipole moments. As liquids, they have high relative permittivities, often in the 30s. Nitrile groups in organic compounds can undergo a variety of reactions depending on the reactants or conditions. A nitrile group can be hydrolyzed, reduced, or ejected from a molecule as a cyanide ion.Electric Literature of C6H5NS
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts