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Molecular Structure and Thermal Analysis of Potassium Hydrogenphthalate Monohydrate
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Yu-Feng Li
,
Jian-Guo Zhang
Published/Copyright:
June 2, 2014
Single crystals of potassium hydrogenphthalate monohydrate, KHPhth(H2O), were grown from aqueous solution using a slow cooling method and the structure was determined by X-ray diffraction analysis. The crystals belong to the monoclinic space group P21/c. Its unit cell parameters are as follows: a = 1.1235(1), b = 0.6689(1), c = 1.1998(2) nm, β = 98.85°, V = 0.8909(1) nm3, Dc = 1.657 g/cm3, Z = 4, F(000) = 456. The thermal decomposition of the complex was studied using differential scanning calorimetry (DSC), thermogravimetry-derivative thermogravimetry (TGGTG) and FT-IR techniques. With a linear heat rate, the diagrams show three endothermic processes. RCOOK and K2CO3 are produced at 330 and 467°C, respectively, according to FT-IR analysis.
Received: 2003-8-27
Published Online: 2014-6-2
Published in Print: 2003-12-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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Keywords for this article
Potassium Hydrogenphthalate Monohydrate;
Molecular Structure;
Thermal Analysis
Articles in the same Issue
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