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Influence of the cation on the formation of free hydrogen and formaldehyde in the thermal decomposition of formates

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Abstract

Three stages have been distinguished in the thermal decomposition of formates: It was found that in the first stage carbon dioxide is evolved, leaving structural elements of the respective cation hydride in the reaction system:\(HCO_2^ - \to H^ - + CO_2 \) The second stage depends on the character of the bond in the intermediately formed hydride:

The third stage is connected with formaldehyde transformation into different organic compounds, depending on the character of the metal oxide formed in the thermal decomposition of the formate. This explains the formation of free hydrogen and organic compounds identified as thermal decomposition products of various formates.

Zusammenfassung

Bei der thermischen Zersetzung von Formiaten konnten drei Schritte unterschieden werden. Im ersten Schritt wird Kohlendioxid unter Verbleib von Strukturelementen des betreffenden Kationhydrids in Freiheit gesetzt:\(HCO_2^ - \to H^ - + CO_2 \) Der zweite Schritt hängt vom Charakter der Bindung in dem als Intermediärverbindung gebildeten Hydrids ab:

Der dritte Schritt betrifft die Überführung von Formaldehyd in verschiedene organische Verbindungen, die abhängig vom Charakter des bei der thermischen Zersetzung des Formiats gebildeten Metalloxids ist. Dadurch findet die Bildung von freiem Wasserstoff und der als Zersetzungsprodukte der verschiedenen Formiate identifizierten organischen Verbindungen ihre Erklärung.

Резюме

Разделены три стадии термического разлож ения формиатов. Найдено, чт о на первой стадии разложения об разуется гидрид-ион и двуокись углерода по следующе й схеме:\(HCO_2^ - \to H^ - + CO_2 \) Вторая стадия зависи т от характера взаимо действия образующегося гидри д-иона:

Третья стадиа связан а с дальнейшим превра щением формальдегида до раз личных органических соединений, природа к оторых зависит от хар актера окиси металла, образу ющейся при термическом разложе нии формиата. Приведе нные реакции объясняют образован ие водорода и органических соедин ений, найденных в прод уктах термического разлож ения формиатов.

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Authors and Affiliations

  1. Department of chemistry, Institute of basic chemistry, Warsaw Technical University, Warsaw, Poland

    A. Górski & A. D. Kraśnicka

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  1. A. Górski
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  2. A. D. Kraśnicka
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Górski, A., Kraśnicka, A.D. Influence of the cation on the formation of free hydrogen and formaldehyde in the thermal decomposition of formates. Journal of Thermal Analysis 32, 1345–1354 (1987). https://doi.org/10.1007/BF01913334

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  • DOI: https://doi.org/10.1007/BF01913334

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