Solid state synthesis, characterization and thermogravimetric study of the adducts CoCl2•6L (L = ethyleneurea, propyleneurea and ethylenethiourea)

被引：13

作者：

de Farias, RF ^{[1
]}

机构：

[1] Univ Fed Roraima, UFRR, Dept Quim, BR-69301970 Boa Vista, Roraima, Brazil

来源：

THERMOCHIMICA ACTA | 2001年 / 376卷 / 01期

关键词：

cyclic amides; adducts; copper; cobalt; thermogravimetry;

D O I：

10.1016/S0040-6031(01)00531-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The title compounds were synthesized by using an alternative solid state route, and characterized by elemental analysis, infrared spectroscopy and thermogravimetry, The IR data are in agreement with a coordination through oxygen for ethyleneurea (EU) and propyleneurea (PU) and through nitrogen for ethylenethiourea (ETU). EU, PU and ETU adducts exhibit two mass loss steps, suggesting that the coordination positions are not equivalent for all adducts, and that there are two ligand molecules closer to the metal cation. This hypothesis is supported by quantum chemical (density functional, DF) calculations. The observed thermal stability sequence is ETU > PU > EU. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：63 / 66

页数：4

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