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Solid-phase polymorphism of p-n-hexyloxy- and p-n-heptyloxybenzoic acids |
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| Authors: | L A Nosikova Z A Kudryashova L D Iskhakova A Yu Tsivadze |
| Institution: | (1) Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 117571, Russia;(2) Research Center of Fiber Optics, Russian Academy of Sciences, Moscow, Russia;(3) Institute of Physical Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117071, Russia |
| Abstract: | The solubility of p-n-hexyloxy- and p-n-heptyloxybenzoic acids in nonaqueous solvents of different polarities was determined over the temperature range from ?20 to 60°C. Acid polymorphs were obtained by crystallization from solutions and melts and by the thermal shock method. The temperatures and enthalpies of phase transitions and X-ray characteristics of the new polymorphs were determined. |
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