Aqueous solubilities of lower diamondoid hydrocarbons, adamantane (C10H16) and diamantane (C14H20), were measured along the 5 MPa isobar at temperatures between 313 K and the solid liquid vapor triplepoint temperature of the solute. The activity coefficients of the individual diamondoids in saturated aqueous solutions were estimated from the solubility data employing two different approximations of the puresolute heat capacity difference ACP2. The aqueous solubilities and activity coefficients of diamondoids were compared with those of polycyclic aromatic hydrocarbons with the same carbon numbers. Depending on temperature and on the approximation of ACP2, the activity coefficient of adamantane in saturated aqueous solution exceeds that of naphthalene by a factor ranging within 70 to 150, whereas the activity coefficient of diamantane in saturated aqueous solution exceeds that of anthracene by a factor ranging within 10 to 50.
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.