SOLUBILITY OF PYRENE IN ORGANIC NONELECTROLYTE SOLVENTS - COMPARISON OF OBSERVED VERSUS PREDICTED VALUES BASED UPON MOBILE ORDER THEORY

Experimental solubilities are reported at 26.O degrees C for pyrene di ssolved in twenty different organic nonelectrolyte solvents containing ether-, ester-, chloro-, hydroxy-, and methyl-functional groups. Resu lts of these measurements, combined with our previously published pyre ne solubility data in benzene, dibutyl ether, 1,4-dichlorobutane, 1-pr opanol, 2-propanol and saturated hydrocarbons, are used to test the ap plications and limitations of expressions derived from Mobile Order th eory. For the 30 solvents for which predictions could be made computat ions show that Mobile Order theory does provide fairly reasonable (tho ugh by no means perfect) estimates of the saturation mole fraction sol ubilities. Average absolute deviation between predicted and observed v alues is circa 79%. In comparison, the average absolute deviation incr eases significantly to 1380% when ideal solution behavior is assumed.