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Thermogravimetric study of some divalent metal chelate polymers of dithiooxamide

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Abstract

The thermal properties of polymeric chelates of dithiooxamide with divalent copper, cobalt, zinc and nickel have been investigated. The order of thermal stability is Ni>Co∼Zn>Cu, which is the same as that observed for previously studied naphthazarin and rhodizonic acid chelates. The procedural decomposition temperatures indicate that the dithiooxamide chelates, which are not aromatic, are about as stable as the aromatic naphthazarin and rhodizonic acid chelates. Several unsuccessful attempts were made to prepare beryllium and manganese (II) chelates.

Résumé

On a étudié les propriétés thermiques des chélates polymères du dithiooxamide avec le cuivre, le cobalt, le zinc et le nickel. Leur stabilité thermique suit le mÊme ordre que celui observé pour les chélates de la naphtazarine et de l'acide rhodizonique, étudiés préalablement (Ni > Co ∼ Zn > Cu). Les températures de décomposition qui ont été trouvées indiquent que les chélates non aromatiques du dithiooxamide ont à peu près la mÊme stabilité que les chélates aromatiques de la naphtazarine et de l'acide rhodizonique. A plusieurs reprises, on a tenté sans succès de préparer des chélates avec le béryllium et le manganèse.

Zusammenfassung

Die thermischen Eigenschaften polymerer Chelate von Dithiooxamid mit zweiwertigem Kupfer, Kobalt, Zink und Nickel wurden untersucht. Die Reihenfolge der thermischen Stabilität von Ni > Co ∼ Zn > Cu ist dieselbe, welche für die vorhergehend untersuchten Naphthazarin- und Rhodizonsäure-Chelate beobachtet wurde. Die Zersetzungstemperaturen der Vorgänge deuten darauf hin, daß die nicht aromatischen Dithiooxamid-Chelate etwa die gleiche Stabilität besitzen, wie die aromatischen Naphthazarin- und Rhodizonsäure-Chelate. Mehrere erfolglose Versuche wurden zur Herstellung von Beryllium- und Mangan(II)-Chelaten durchgeführt.

РЕжУМЕ

ИсслЕДОВАНы тЕРМИЧЕ скИЕ сВОИстВА пОлИМЕ РНых хЕлАтОВ ДИтИООксАМИ ДА с ДВУхВАлЕНтНыМИ МЕДь У, кОБАльтОМ, цИНкОМ И Н ИкЕлЕМ. УстАНОВлЕННыИ РьД тЕ РМОстАБИльНОстИ: Ni > сО ∼ Zn > сu тОт жЕ, ЧтО И Дль РАНЕЕ ИсслЕДОВАННых хЕлАтОВ НАФтАжАРИНО И И РОДИжОНОВОИ кИслОт. тЕМпЕРАтУРы РАспАДА пОкАжыВАУт, ЧтО ДИтИООксАМИДНыЕ хЕлАты, НЕ ьВльУЩИЕсь АРОМАтИЧЕскИМИ, пОЧт И тАк жЕ стАБИльНы, кАк АРОМАт ИЧЕскИЕ хЕлАты НАФтАжАРИНОИ И РОДИжОНОВОИ кИслОт. УДАЧНы ОтДЕльНыЕ пОпыткИ с ц ЕльУ пРИгОтОВлЕНИь хЕлАт ОВ с БЕРИлИЕМ И МАРгАН цЕМ (II).

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Taken in part from a thesis submitted by C. P. M. to the Graduate School of the University of Notre Dame in partial fulfillment of the requirements for the Ph. D. degree.

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Bottei, R.S., McEachern, C.P. Thermogravimetric study of some divalent metal chelate polymers of dithiooxamide. Journal of Thermal Analysis 6, 37–43 (1974). https://doi.org/10.1007/BF01911484

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  • DOI: https://doi.org/10.1007/BF01911484

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