Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen: http://dx.doi.org/10.18419/opus-13715
Autor(en): Frey, Wolfgang
Schwenger, Alexander
Berking, Tim
Richert, Clemens
Titel: Transitions in solvate crystals of a tetraaryladamantane
Erscheinungsdatum: 2023
Dokumentart: Zeitschriftenartikel
Seiten: 8
Erschienen in: Helvetica chimica acta 106 (2023), No. e202300102
URI: http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-137340
http://elib.uni-stuttgart.de/handle/11682/13734
http://dx.doi.org/10.18419/opus-13715
ISSN: 0018-019X
1522-2675
Zusammenfassung: Obtaining high-resolution structures of liquid compounds can be difficult. Encapsulating them in the lattice of a larger organic molecule acting as crystallization chaperone is one option to overcome this difficulty. Tetraaryladamantane ethers can play the role of chaperones, accommodating a range of different guest molecules in their crystals. How well-ordered crystalline arrangements for molecules of different shape are achieved is not clear. Cases in which more than one structure is found may shed light on this phenomenon. Here, we report low-order cubic crystal structures of 1,3,5,7-tetrakis(2,4-dimethoxyphenyl)adamantane (TDA) encapsulating ortho-xylene or cyclohexane, together with better ordered structures obtained after warming the crystals to 60 °C. Evidence for cubic crystal systems was also found for limonene, hexachlorobutadiene and eucalyptol, with a transition to a triclinic system for the former two, but no transition up to 70 °C for the latter. These findings indicate that some solvate structures of TDA can readily undergo structural transitions to less solvated, better ordered systems. Crystals obtained by rapid thermal crystallization may be in kinetically trapped states, and the transition to a solvate-free crystal system appears to have a kinetic barrier that depends strongly on the structure of the liquid guest molecules encapsulated in the lattice.
Enthalten in den Sammlungen:03 Fakultät Chemie

Dateien zu dieser Ressource:
Datei Beschreibung GrößeFormat 
HLCA_HLCA202300102.pdf9,11 MBAdobe PDFÖffnen/Anzeigen


Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons Creative Commons