THERMAL STUDIES OF SOME DIVALENT METAL-CHELATES OF CROCONIC ACID

被引：5

作者：

BOTTEI, RS

CHANG, HS

LUSARDI, DA

机构：

[1] University of Notre Dame, Notre Dame, 46556, Indiana

来源：

JOURNAL OF THERMAL ANALYSIS | 1979年 / 16卷 / 02期

关键词：

D O I：

10.1007/BF01910701

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The thermal properties of chelates of croconic acid and squaric acid with divalent copper, cobalt, nickel and zinc have been investigated by TG and DTA. The decreasing order of thermal stability for the decomposition of the croconate chelates was Ni > > Zn > Co=Cu and for the squarate complexes, Zn > Co=Cu > Ni. The copper croconate TG showed water loss in two distinct steps. This was rationalized on the basis of the already known Jahn-Teller effect for this molecule. The nickel squarate was thought to have a different structure than the other squarate chelates. Activation energies were calculated for the croconate chelates from their DTA curves. © 1979 Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest.

引用

页码：389 / 397

页数：9

共 13 条

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