The structure and desorption properties of the ammines of the group II halides
The synthesis of the magnesium halide ammines (Mg(NH)Cl, Mg(NH)Br and Mg(NH)I) is reported and their structures are identified by high resolution X-ray diffraction. The structures of Mg(NH)Br and Mg(NH)I are reported for the first time. The desorption properties of Mg(NH)Cl, Mg(NH)Br and Mg(NH)I are...
| Main Authors: | , , , |
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| Format: | Journal article |
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2013
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| Summary: | The synthesis of the magnesium halide ammines (Mg(NH)Cl, Mg(NH)Br and Mg(NH)I) is reported and their structures are identified by high resolution X-ray diffraction. The structures of Mg(NH)Br and Mg(NH)I are reported for the first time. The desorption properties of Mg(NH)Cl, Mg(NH)Br and Mg(NH)I are examined by thermogravimetric analysis and NMR, and the trends in desorption properties as a function of composition are interpreted using a simple ionic model. It is found that the desorption properties are dependent on the lattice enthalpy of the intermediate and final phases Mg(NH)X, Mg(NH)X and MgX, that the anion has limited effect on the state of Mg-N bonding and that the desorption temperature of ionic ammines may be tuned by varying the size of the anion. © 2013 Elsevier B.V. All rights reserved. |
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