Thermic and thermodynamic properties of 2,4-diamine-6-methyl-1,3,5-triazine dodecahydro-closo-dodecaborate hydrate

Authors

  • Vitaly I. Saldin Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Lidia N. Ignatieva Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Vadim A. Mashchenko Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Vasiliy V. Sukhovey Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Yury V. Marchenko Institute of Chemistry, FEB RAS, Vladivostok, Russia

Keywords:

thermic study, bomb calorimetry, enthalpies of combustion and formation, 2,4-diamine-6-methyl-1,3,5-triazine dodecahydro-closo-dodecaborate hydrate

Abstract

By direct combustion in the KL-5 calorimeter, the specific heat of combustion of 2,4-diamine- 6-methyl-1,3,5-triazine dodecahydro-closo-dodecaborate hydrate was determined, from which its standard enthalpies of combustion (–14606 kJ/mol) and formations (–797 kJ/mol) were calculated. Using DSC, TG, X-ray, IR and CMS, it was found that at the first stage of the thermal decomposition of (С4Н7N5Н)2[B12H12]∙Н2О (265−290 оС), acetonitrile is released, and as a result of its combustion the temperature up to 4700 °C can develop. Under the conditions of a calorimetric bomb (high oxygen pressure and temperature), this causes complete combustion of the half-life products of (С4Н7N5Н)2[B12H12]∙Н2О without the formation of B–C–N-containing residues. The importance of taking into account the composition of the combustion products of the [B12H12]2− anion compounds for the accuracy of calculating their thermodynamic characteristics is discussed.

Author Biographies

Vitaly I. Saldin, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Doctor of Sciences in Chemistry, Leading Researcher

https://orcid.org/0000-0002-8155-195X

Lidia N. Ignatieva, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Doctor of Sciences in Chemistry, Head of the Laboratory 

https://orcid.org/ 0000-0002-8162-440X

Vadim A. Mashchenko, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Junior Researcher

Vasiliy V. Sukhovey, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Candidate of Sciences in Chemistry, Researcher

Yury V. Marchenko, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Candidate of Sciences in Chemistry, Senior Researcher

https://orcid.org/0000-0002-0494-9948

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Published

2023-12-21

How to Cite

Saldin В. И., Ignatieva Л. Н., Mashchenko В. А., Sukhovey В. В., & Marchenko Ю. В. (2023). Thermic and thermodynamic properties of 2,4-diamine-6-methyl-1,3,5-triazine dodecahydro-closo-dodecaborate hydrate. Vestnik of the Far East Branch of the Russian Academy of Sciences, (6), 92–104. Retrieved from http://vestnikdvo.ru/index.php/vestnikdvo/article/view/1147

Issue

No. 6 (2023)

Section

Non-conventional materials