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The crystal structure of the inclusion complex of cyclo-maltoheptaose (β-cyclodextrin) with 3,3-dimethylbutylamine

✍ Scribed by Irene M. Mavridis; Eugene Hadjoudis; George Tsoucaris

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
680 KB
Volume
220
Category
Article
ISSN
0008-6215

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✦ Synopsis

The crystal of the 1:1 complex of 3,3-dimethylbutylamine with cyclomaltoheptaose (beta CD, beta-cyclodextrin) is monoclinic C2 with a = 19.187(9), b = 24.56(1), c = 15.893(7) A, beta = 108.77(4) degrees, V = 7091 A3, and Z = 4. Two beta CD molecules, held together by intermolecular hydrogen bonds involving HO-3, form dimers, in the cavities of which two 3,3-dimethylbutylamine and two water molecules are accommodated. The guest molecule is completely enclosed in the cavity. The amino group is located at the secondary-hydroxyl-group side, and is hydrogen-bonded to the entrapped water molecules. The dimers form channels along the c axis. The inter-dimer space is filled with 10.7 water molecules that are distributed over 14 sites, and there is a dense network of hydrogen bonds involving the water molecules and the beta CD hydroxyl groups.

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