Polymorphism of (+)N-tosyl-L-glutamic acid

Halina Hajmowicz , Ludwik Synoradzki , Krzysztof Bujnowski , Janusz Zachara

Abstract

It has been shown that polymorphism is the reason for the occurrence of (+)N-tosyl-L-glutamic acid 1 with various melting points. 1 occurs in two crystalline forms: α and β. Form α-1 (prisms) having a melting point of 145–147°C is chemically pure and stable. Form β-1, however, is unstable and is formed as a result of the stabilizing effect of an organic solvent not introduced into the structure of the crystal. At about 125°C the β forms is transformed to the α form. The melting point of the β form depends on the amount and type of solvent contained in the crystal, which, during measurement cannot leave the system.
Author Halina Hajmowicz (FC / LTP)
Halina Hajmowicz,,
- Laboratory Of Technological Processes
, Ludwik Synoradzki (FC / LTP)
Ludwik Synoradzki,,
- Laboratory Of Technological Processes
, Krzysztof Bujnowski (FC / LTP)
Krzysztof Bujnowski,,
- Laboratory Of Technological Processes
, Janusz Zachara (FC / CICSST)
Janusz Zachara,,
- Chair Of Inorganic Chemistry And Solid State Technology
Journal seriesJournal of thermal analysis, ISSN 0022-5215, 1572-8943
Issue year1997
Vol48
No6
Pages1385-1392
Keywords in EnglishCrystallization, Inorganic Chemistry, Measurement Science, Instrumentation, melting point, N-tosyl-L-glutamic acid, Physical Chemistry, Polymer Sciences, Polymorphism, thermogravimetric analysis, X-ray powder diffraction
Abstract in Polishxxx
DOIDOI:10.1007/BF01983449
URL http://link.springer.com/article/10.1007/BF01983449
Languageen angielski
Score (nominal)0
Score sourcejournalList
Publication indicators WoS Citations = 2; GS Citations = 1.0
Citation count*1 (2015-04-26)
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