Ł. Dobrzycki, Kamila Pruszkowska, R. Boese
Mar 30, 2016
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Influential Citations
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Journal
Crystal Growth & Design
Abstract
Cyclobutylamine (cBA) and its four new hydrates were crystallized using an in situ crystallization technique with a focused infrared laser beam procedure on a single crystal diffractometer. Two groups of hydrates, separated by a gap, can be identified: the “lower hydrates” (the known hemi- and new monohydrate) plus the “higher hydrates”: (6 3/7, approximately 7 1/2 and 9 1/2). The “lower hydrates” are fully ordered structures with well-defined stoichiometries; in contrast the “higher hydrates” are severely disordered with water molecules organized into three-dimensional networks, similar to clathrate hydrate type sI (hydrate 7 1/2) and sH (hydrates 6 3/7 and 9 1/2). The latter two structures can be considered as extensions of the hexagonal clathrate hydrate sH with addition of water segments in a manner which preserves the hexagonal/trigonal symmetry of the lattice, changing only the c axis of the unit cell. Such a variation is commonly used in engineering for modifying standard structures to “extended” v...