Dissolution Properties of 3,6-Bis(1H-1,2,3,4-tetrazol-5-ylamino)-1,2,4,5-tetrazine in N-Methyl Pyrrolidone and Dimethyl Sulfoxide

摘要

The molar enthalpies of dissolution for 3,6-bis(1H-1,2,3,4-tetrazol-5-ylamino)-1,2,4,5-tetrazine (BTATz) were measured in N-methyl-2-pyrrolidone (NMP) and dimethyl sulfoxide (DMSO) using an RD496-2000 Calvet microcalorimeter at 298.15 K under atmospheric pressure. Empirical formulae for the calculation of the molar enthalpies of dissolution (?_(diss)H), relative partial molar enthalpies (?_(diss)H_(partial)), and relative apparent molar enthalpies (?_(diss)H_(apparent)) were obtained from the experimental results of the dissolution processes of BTATz in NMP or DMSO. Furthermore, the corresponding kinetic equations describing the two dissolution processes are da/dt = 10~(-3.55)(1 - a)~(0.57) for the dissolution of BTATz in NMP, and da/dt = 10~(-3.74)(1 - a)~(0.63) for the dissolution of BTATz in DMSO, respectively.