THE STANDARD ENTHALPIES OF FORMATION OF 2-METHYLBIPHENYL AND DIPHENYLMETHANE

Measurements of the energies of combustion are reported for 2-methylbi phenyl (Chemical Abstracts registry number [643-58-3]), and diphenylme thane (registry number [101-81-5]). Standard enthalpies of combustion and formation in the condensed state are derived for both compounds. S tandard enthalpies of vaporization at 298.15 K are reported for both c ompounds and the corresponding ideal-gas standard enthalpies of format ion derived. The results are compared with literature values and discr epancies arising from the use of values for diphenylmethane from a com prehensive compilation are clarified.