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Thermal analysis of some cyano compounds

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Abstract

The thermal behaviour of the cyano compounds NaCN, K4Fe(CN)6 · 3H2O, K3Fe(CN)6, K3Co(CN)6 and K2Hg(CN)4 has been investigated by using conventional thermal analysis techniques and infrared spectroscopy. The results indicate the absence of “decomplexing” reactions for all the complexes, and “internal” redox reactions for the compounds K3Fe(CN)6, K3Co(CN)6 and K2Hg(CN)4. In all the investigated cases, the formation of cyanate and carbonate is demonstrated.

Zusammenfassung

Das thermische Verhalten der Cyanoverbindungen NaCN, K4Fe(CN)6 · 3H2O, K3Fe(CN)6, K3Co(CN)6 und K2Hg(CN)4 wurde mittels konventioneller thermischer Analysentechniken und Infrarotspektroskopie untersucht. Die Ergebnisse deuten darauf hin, daß bei allen Komplexen keine „Dekomplexierungs“-Reaktionen verlaufen und bei den Verbindungen K3Fe(CN)6, K3Co(CN)6 und K2Hg(CN)4 „interne“ Redoxreaktionen vor sich gehen. In allen untersuchten Fällen werden Cyanat und Carbonat gebildet.

Резюме

Используя обыченые т ермоаналитические методы и ИК спектроск опию, было изучено термическое поведение цианосоед инений NaCN, K4Fe(CN)6 · 3H2O, K3Fe(CN)6, K3Co(CN)6 и K2Hg(CN)4. Полученные рез ультаты служат доказательством отс утствия для всех комплексов реакций « декомплексирования » и отсутствие «внутрен них» окислительново сстановительных окислительновосста новительных реакций для соединен ий K3Fe(CN)6, K3Co(CN)6 и K2Hg(CN)4. Разложение всех исследованных с оединений протекает с образованием цианат а и карбоната.

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Authors and Affiliations

  1. Institute of Analytical Chemistry, University of Messina, via Dei Verdi, 98100, Messina, Italy

    D. De Marco, A. Marchese, P. Migliardo & A. Bellomo

Authors
  1. D. De Marco
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  2. A. Marchese
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  3. P. Migliardo
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  4. A. Bellomo
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Additional information

Supported by the Italian MPI. Presented at “Journées de Calorimetrie et Analyse Thermique”, Montpellier, France, 1985.

The authors are grateful to Mr. A. Bonetti, who ran some thermal analysis curves.

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De Marco, D., Marchese, A., Migliardo, P. et al. Thermal analysis of some cyano compounds. Journal of Thermal Analysis 32, 927–937 (1987). https://doi.org/10.1007/BF01913779

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  • DOI: https://doi.org/10.1007/BF01913779

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