The crystal structure of the inclusion complex of cyclomaltoheptaose (β-cyclodextrin) with 4-tert-butylbenzoic acid
✍ Scribed by Aliki Rontoyianni; Irene M. Mavridis; Eugene Hadjoudis; Albert J.M. Duisenberg
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 829 KB
- Volume
- 252
- Category
- Article
- ISSN
- 0008-6215
No coin nor oath required. For personal study only.
✦ Synopsis
The crystal of the 1: 1 complex of cyclomaltoheptaose (p-cyclodextrin, PCD) with 4-tert-butylbenzoic acid is triclinic Pl with a = 18.244(3), b = 15.476(3), c = 15.417(2) A; (Y = 102.94(l), p = 113.08(l), y = 99.69(2)"; V = 3740(l) As; and Z = 2. The final R was determined to be 0.0932 for 8111 observed reflections (MoKa radiation). Two independent molecules of PCD form a dimer, via hydrogen bonds involving the O-3n atoms, that encloses two molecules of 4-tert-butylbenzoic acid. The guest molecules penetrate the pCD cavities to different depths. There are 26.8 water molecules, distributed over 30 sites, which form a dense water network surrounding the dimers.
* Atomic coordinates for this structure have been deposited with the Cambridge Crystallographic Data Centre. The coordinates may be obtained, on request, from the Director,
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