S.M. Pimenova

Standard enthalpies of formation of 4-methylbiphenyl and 4,4′-dimethylbiphenyl

The energies of combustion of 4-methylbiphenyl and 4,4′-dimethylbiphenyl in the crystal state were measured in a precision calorimeter equipped with a self-sealing bomb at 298.15 K. The enthalpies of vaporization of these substances were measured in an isothermal heat-conducting Calvet microcalorimeter. Standard enthalpies of formation were calculated for 4-methylbiphenyl and 4,4′-dimethylbiphenyl in the crystal, liquid, and gas states.

The standard enthalpies of formation of 4,4′-dinitrodiphenyl ether

The energy of combustion and the standard enthalpy of formation of 4,4′-dinitrodiphenyl ether were determined experimentally for the first time.

The Standard Enthalpies of Formation of 1-Nitrodispiro(2.0.2.1)heptane and 1-Nitrodispiro(2.0.3.1)octane

The energies of combustion and standard enthalpies of formation of 1-nitrodispiro[2.0.2.1]heptane and 1-nitrodispiro[2.0.3.1]octane were determined experimentally.