ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of Constant-Volume Combustion Energies for Zinc L-Threonate and Calcium L-Threonate

S. Chen, X. Yang, Z. Ju, H. Li, and S. Gao

Department of Chemistry, Northwest University, Xi'an 710069, P. R. China

Abstract: Zinc L-threonate that was not reported in literature and calcium L-threonate were prepared. The constant-volume combustion energies of the compounds, ∆_cE, were determined by a precision rotating bomb calorimeter at 298.15 K. Their values are (-2853.14 ∓ 1.49) U mol^-1 and (-3133.13 ∓ 1.63) kJ mol^-1, respectively. The standard enthalpies of combustion, ∆_cH °, and standard enthalpies of formation, ∆_fH°, have been calculated for these compounds. They are (-2850.66 ∓ 1.49) kJ mol^-1, (-2648.69 ∓ 1.11) kJ mol^-1 for zinc L-threonate and (-3130.65 ∓ 1.63) kJ mol^-1), (-2653.34 ∓1.08) kJ mol^-1 for calcium L-threonate.

Full paper in Portable Document Format: 554a239.pdf

Chemical Papers 55 (4) 239–241 (2001)