Crown Ether Complexed Ion Pairs: Solution and Solid-State Structures of the (2S,6S)-2,6-Dimethyl-1,4,7,10,13,16-hexaoxacyclooctadecane Complex of Potassium Nitrate
The structure of the (2S,6S)-2,6-dimethyl-1,4,7,10,13,16-hexaoxacyclooctadecane complex with the potassium nitrate ion pair (C14H28KNO9) has been studied in chloroform solution and in the solid state by FTIR spectroscopy. The solid-state structure has also been determined by X-ray diffraction. The monoclinic crystals conform to space group P21 with a = 12.486 (5) Å, b = 8.515 (3) Å, c = 18.587 (9) Å, β = 91.97 (4)°, and Z = 4. The close correspondence of the solution and solid-state infrared spectra indicates that the structure is similar in both phases. The solution spectrum suggests that the ion pairs are externally complexed by the crown ether. which has a conformation with approximate D3d symmetry (ignoring the methyl substituents), similar to that observed for K+ complexes of unsubstituted 18-crown-6, and that the nitrate is coordinated to the K+ in a bidentate manner. © 1986, American Chemical Society. All rights reserved.
Duke Scholars
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Inorganic & Nuclear Chemistry
- 3403 Macromolecular and materials chemistry
- 3402 Inorganic chemistry
- 0399 Other Chemical Sciences
- 0306 Physical Chemistry (incl. Structural)
- 0302 Inorganic Chemistry
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Inorganic & Nuclear Chemistry
- 3403 Macromolecular and materials chemistry
- 3402 Inorganic chemistry
- 0399 Other Chemical Sciences
- 0306 Physical Chemistry (incl. Structural)
- 0302 Inorganic Chemistry