Vapor pressures and enthalpies of vaporization of azides

Thermochemistry of organic azides revisited

“…Nowadays, the modern quantum-chemical methods allow for performing the enthalpy data evaluation, provided that sufficient amount of the experimental data with the benchmark quality are available for the methods attestation. This paper extends our previous experimental study of a series of organic azides [3]. A complex thermochemical studies (including transpiration, combustion calorimetry and DSC) on highly pure samples of 4-nitro-phenyl azide, 1-octyl azide and 1 decyl-azide.…”

“…These literature results are significantly higher in comparison to our more reliable results from transpiration method (see Table 3). In our previous work [3] we reported that the family of 1-alkyl-azides fit very well in the linear correlation. The dependence of vaporization enthalpy Table 2 Results from measurements of the vapour pressure p of azides using the transpiration method.…”

Vaporization enthalpies of a series of the halogen-substituted fluorobenzenes

“…For example, vaporization enthalpies D g 1 H m (298.15 K) exhibit a good linear function of the number of carbon atoms in the chain of the homologous series of n-alkanes [12] or n-alkyl-nitriles [13]. Linear correlations of D g 1 H m (298.15 K) of the geminal substituted azides [14] or aromatic ethers [15] with the data for similar structured molecules can be also used to evaluate the experimental data.…”

“…Br) 10.4 [2] DH(H ! I) 14.9 [2] ortho F-Hal 1.5 meta F-(F or Cl) 0.0 meta F-(Br or I) À1.0 para F-(F or Cl) 0.4 para F-(Br or I) À0.5 Table 7 Comparison of experimental vaporization enthalpies, D g 1 Hm (298.15 K), and those estimated using the group additivity (all values are in kJ mol À1 ). …”

Evaporation characteristics of dual component droplet of benzyl azides-hexadecane mixtures at elevated temperatures

“…So the boiling point of benzyl azides is 503-506 K at 100 kPa. Table 1 compares the fuel properties of dodecane, hexadecane and benzyl azides [23,24]. The heat capacity of benzyl azides is smaller than that of dodecane and hexadecane.…”