1. Structure-Property Relations and Polymorphism in Compressed Methylamines.
- Author
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Podsiadło, Marcin, Olejniczak, Anna, and Katrusiak, Andrzej
- Subjects
- *
POLYMORPHISM (Crystallography) , *HIGH pressure (Technology) , *SINGLE crystals , *X-ray diffraction , *CRYSTAL structure , *METHYLAMINES - Abstract
The structures of a series of the simplest aliphatic amines determined at high pressure by single crystal X-ray diffraction reveal systematic structure property relations involving intermolecular interactions and molecular symmetries. Five new polymorphs have been found: one of methylamine (phase II, space group Fdd2), two of dimethylamine (phase I, space group C2/c and phase II, P21/c), and two of trimethylamine (phase II, space group P21/n and phase III, P21/m). The methylamine and dimethylamine molecules are arranged according to the NH...N hydrogen bonds. The phase diagrams of methylamines have been outlined up to 6 GPa. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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