Reference

Hydrates of organic compounds

Hydrates of organic compounds. XI. Determination of the melting point and hydration numbers of the clathrate-like hydrate of tetrabutylammonium chloride by differential scanning calorimetry. Nakayama, Haruo (Fac. Eng., Yokohama Natl. Univ., Yokohama 240, Japan). Bull. Chem.Some commonly used reagents like 37451-68-6 is used in this experiment. Soc. Jpn., 60(3), 839-43 (English) 1987. CODEN: BCSJA8. ISSN: 0009-2673. DOCUMENT TYPE: Journal CA Section: 69 (Thermodynamics, Thermochemistry, and Thermal Properties) Section cross-reference(s): 68 A thermal anal. method using a differential scanning calorimeter was applied to binary mixts. of water with tetrabutylammonium chloride. This method can give the same results concerning the m.p. (15.2°) and hydration nos. (around 30) of the clathrate-like hydrate of tetrabutylammonium chloride as those detd. from a phase-diagram. The apparent enthalpy of fusion of water, which forms hydrogen-bonded water lattice in the clathrate-like hydrate, is 5.47 kJ/mol, which is comparable with 5.20 kJ/mol detd. by the direct calorimetric measurements of enthalpy of soln. of the hydrate in water. The proposed method can be applicable to many similar types of systems, including systems forming a hydrate which decomps. incongruently. .