EXPERIMENTAL AND THEORETICAL STUDY OF THE HEAT OF FORMATION OF FORMALDEHYDE DIPEROXIDE

Jorge M. Romero, Laura C. Leiva, Nelly L. Jorge, Manuel E. Gómez Vara

Área de Fisicoquímica, FACENA, U.N.N.E., Campus Universitario, Avda. Libertad 5400, (3400) Corrientes, Argentina. e-mail: jromero@exa.unne.edu.ar

Eduardo A. Castro

CEQUINOR, Departamento de Química, Facultad de Ciencias Exactas, UNLP, CC 962, La Plata 1900, Argentina, e-mail: castro@dalton.quimica.unlp.edu.ar

Abstract

We report the results obtained from the experimental determination and theoretical calculation of the diperoxide formaldehyde molecule.

Experimental work was performed using a macrocalorimeter to get the combustion heat and sublimation enthalpy was determined measuring the equilibrium vapor pressure in equilibrium with the vapor phase at different temperatures through the Clapeyron-Claussius equation.

Theoretical calculations were made resorting to the semiempirical AM1 procedure as well as via RHF ab initio and DFT B3LYP methods at the 3-21 G, 3-21+G, 6-311 G(d,p) and 6-311 +G(d,p) basis set levels.