STANDARD ENTHALPIES OF FORMATION OF N,N'-ETHYLENEBIS(4-AMINOPENT-3-EN-2-ONE) AND N,N'-ETHYLENEBIS(3-AMINO-1-PHENYLBUT-2-EN-1-ONE)

The standard (p(o) = 0.1 MPa) molar enthalpies of combustion, at the t emperature 298.15 K for crystalline N,N'-ethylenebis(4-aminopent-3-en- 2-one), {CH3COCH:C(CH3)NHCH2 .}(2), H(2)ACACEN, and N,N'-ethylenebis(3 -amino-1-phenylbut-2-en-1-one), H(2)BZACEN, {C6H5COCH:C(CH3)NHCH2 .}(2 ), were measured by static bomb-combustion calorimetry in oxygen. The standard molar enthalpies of sublimation of both compounds were measur ed by effusion techniques. These values were used to derive the standa rd molar enthalpies of formation of the compounds, in both the crystal line and the gaseous phases.