DYNAMIC PROTON-EXCHANGE IN THE HYDROGEN DIHYDROXIDE ION H3O2- OF THE HYDROXOSODALITE HYDRATE [NA4(H3O2)]2[SIALO4]6 - H-1 MAS NMR SPECTROSCOPIC EVIDENCE

被引：4

作者：

ENGELHARDT, G ^{[1
]}

SIEGER, P ^{[1
]}

FELSCHE, J ^{[1
]}

机构：

[1] UNIV CONSTANCE,FAK CHEM,W-7750 CONSTANCE,GERMANY

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1992年 / 31卷 / 09期

关键词：

D O I：

10.1002/anie.199212101

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The activation energy is only about 40 kJ mol-1 for the dynamic exchange between the central and the terminal H atoms in the H3O2- ion. This was shown by solid-state NMR spectroscopy on the title compound, in which the H3O2-ions occur isolated in sodalite cages. Since the splitting of H3O2- into H2O and OH- requires an energy of approximately 100 kJ mol-1, such a pathway for the exchange is less likely than the mechanism depicted in (a).

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页码：1210 / 1212

页数：3

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