The heats of fusion of tetrabutylammonium fluoride ionic clathrate hydrates

被引：31
|
作者：
Rodionova, T. V. [1 ,2 ]
Manakov, A. Yu. [1 ,2 ]
Stenin, Yu. G. [2 ]
Villevald, G. V. [1 ,2 ]
Karpova, T. D. [2 ]
机构：
[1] RAS, Siberian Branch, Nikolaev Inst Inorgan Chem, Clathrate Cpds Lab, Novosibirsk 630090, Russia
[2] RAS, Siberian Branch, Nikolaev Inst Inorgan Chem, Thermodynam Inorgan Mat Lab, Novosibirsk 630090, Russia
来源：
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY | 2008年 / 61卷 / 1-2期
关键词：
ionic clathrate hydrates of tetraalkylammonium salts; tetrabutylammonium fluoride; heat of fusion; phase diagram; structure;
D O I：
10.1007/s10847-007-9401-5
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two ionic clathrate hydrates with different structures are formed in the binary system tetrabutylammonium fluoride-water, namely tetragonal structure-I hydrate (TS-I) (n-C4H9)(4)NF center dot 32.8H(2)O, and cubic superstructure-I hydrate (CSS-I) (n-C4H9)(4)NF center dot 29.7H(2)O. The heats of fusion (Delta H-f) of these polyhydrates were measured calorimetrically with differential scanning calorimeter. For TS-I polyhydrate Delta H-f = (204.8 +/- 2.3) kJ/mol hydrate, for CSS-I hydrate Delta H-f = (177.5 +/- 3.1) kJ/mol polyhydrate. The change of water molecules energy state in the water lattices of TS-I and CSS-I polyhydrates are discussed.
引用
收藏
页码：107 / 111
页数：5
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