12-MEMBERED CROWN-ETHERS - CRYSTAL-STRUCTURES OF BENZO-12-CROWN-4 AND NAPHTHO-12-CROWN-4. Simonov, Y. A., Dvorkin, A. A., Fonari, M. S., Malinowski, T. I., Luboch, E., Cygan, A., Biernat, J. F., Ganin, E. V., & Popkov, Y. A. Journal of Inclusion Phenomena and Molecular Recognition in Chemistry, 15(1):79--89, 1993.
12-MEMBERED CROWN-ETHERS - CRYSTAL-STRUCTURES OF BENZO-12-CROWN-4 AND NAPHTHO-12-CROWN-4 [link]Paper  doi  abstract   bibtex   
The crystal structures of two 12-membered crown ethers, benzo-12-crown-4 (1) and naphtho-12-crown-4 (2), have been determined by X-ray analysis. Both structures are molecular. Compound 1 is monoclinic, P2(1)/b, a = 8.466(3), b = 8.019(3), c = 33.590(10) angstrom, gamma = 90.99(3)-degrees. The unit cell contains two crystallographically independent molecules of 1 with similar conformations. Compound 2 is also monoclinic, P2(1)/a, a = 24.148(8), b = 14.535(4), c = 7.987(5) angstrom, gamma = 102.87(2)-degrees. Two independent molecules in the unit cell have significantly different conformations.
@article{ simonov_12-membered_1993,
  title = {12-{MEMBERED} {CROWN-ETHERS} - {CRYSTAL-STRUCTURES} {OF} {BENZO-12-CROWN-4} {AND} {NAPHTHO-12-CROWN-4}},
  volume = {15},
  issn = {0923-0750},
  url = {http://dx.doi.org/10.1007/bf00706476},
  doi = {<Go to ISI>://WOS:A1993LH76600008},
  abstract = {The crystal structures of two 12-membered crown ethers, benzo-12-crown-4 (1) and naphtho-12-crown-4 (2), have been determined by X-ray analysis. Both structures are molecular. Compound 1 is monoclinic, P2(1)/b, a = 8.466(3), b = 8.019(3), c = 33.590(10) angstrom, gamma = 90.99(3)-degrees. The unit cell contains two crystallographically independent molecules of 1 with similar conformations. Compound 2 is also monoclinic, P2(1)/a, a = 24.148(8), b = 14.535(4), c = 7.987(5) angstrom, gamma = 102.87(2)-degrees. Two independent molecules in the unit cell have significantly different conformations.},
  number = {1},
  journal = {Journal of Inclusion Phenomena and Molecular Recognition in Chemistry},
  author = {Simonov, Y. A. and Dvorkin, A. A. and Fonari, M. S. and Malinowski, T. I. and Luboch, E. and Cygan, A. and Biernat, J. F. and Ganin, E. V. and Popkov, Y. A.},
  year = {1993},
  pages = {79--89}
}

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