Dissolution properties of 5,5′-bistetrazole-1, 1′-dihydroxy and disodium 5,5′-bistetrazole-1, 1′-diolate in dimethyl sulfoxide.

The enthalpies of dissolution for 5,5′-Bistetrazole-1, 1′-dihydroxy ((HO)BTO) and disodium 5,5′-Bistetrazole-1,1′-diolate ([Na(HO)]BTO) in dimethyl sulfoxide (DMSO) at 298.15 K were studied by using a C-80 Calvet microcalorimeter. Empirical formulae for the calculation of the molar enthalpies of dissolution (Δ H), relative partial molar enthalpies (Δ H ), and relative apparent molar enthalpies (Δ H ) were deduced by the experimental results of the dissolution processes of (HO)BTO and [Na(HO)]BTO in DMSO. Finally, the corresponding kinetic equations describing the dissolution processes were dα/dt = 10(1− α) for the dissolution of (HO)BTO in DMSO, and dα/dt = 10(1− α) for the dissolution of [Na(HO)]BTO in DMSO. [ABSTRACT FROM AUTHOR]