The constant-volume combustion energies have been determined for three kind
s of crown ether (CE) using a precision rotating-bomb calorimeter (RBC). Th
e standard enthalpies of combustion, Delta H-CE(c)theta, and standard entha
lpies of formation, Delta H-CE(f)theta have been calculated for these CE. T
wo empirical formulas have been proposed about the standard combustion enth
alpies of aromatic CE. (C) 2001 Elsevier Science B.V. All rights reserved.