Thermodynamic properties of some phosphate-carbohydrates and their strengths of bonds

ABSTRACT

The calculation of thermodynamic functions of condensed carbo- and phospha carbohydrates on the equation ΔΨ^o = i ± f (N - g), in which parameters i and f are the correlation coefficients, N is a general number of electrons in researched molecule, from which is subtracted a number (g) of lone electron pairs of heteroatoms, have been made. On the base of equations Δ_aH^o = Σ Δ_atomH^o_cond - Δ_fH^o_cond = ΣS_b (H_b) and R_i² = Σ{| Δ_aH^o_exp – Δ_aH^o_calc | g_i}², were firstly calculated the bond enthalpies of for condensed phosphatecarbohydrates: P = O 140.0, C-O-P 43.2, P-O-H 176.8, C-C(cycl) 77.8 kJ mol⁻¹.

GRAPHICAL ABSTRACT

KEYWORDS:

• Bond energy
• phosphate-carbohydrate