Abstract
Anhydrous magnesium methanesulfonate (Mg(SO3CH3)2) and calcium methanesulfonate (Ca(SO3CH3)2) as well as hydrates Mg(SO3CH3)2 · 2H2O and Mg(SO3CH3)2 · 12H2O have been prepared and identified. Thermal degradation of the salts in air has been studied by thermogravimetric analysis. Parameters of phase transformations of Ca(SO3CH3)2 and Mg(SO3CH3)2 · 2H2O observed at –62.7 and –119°С, respectively, have been found by differential scanning calorimetry. Melting point of Mg(SO3CH3)2 · 12H2O (45.4°С) synthesized immediately in DSC instrument because of compound instability in air has been determined. Incongruent melting has been shown for Mg(SO3CH3)2 · 12H2O.
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