Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

A detailed single-crystal structure analysis is reported for ethylene oxide hydrate. This confirms the polyhedral host lattice formed by 46 hydrogen-bonded water molecules in a cubic unit cell of 12.03 Å with space-group symmetry Pm3n. Disordered ethylene oxide molecules occupy the six equivalent tetrakaidecahedral cavities, and their electron-density distribution suggests that they are hindered axial rotors. Additional guest molecules, either ethylene oxide, oxygen, or nitrogen molecules occupy the two dodecahedral cavities with high disorder and low statistical weight. The compound is therefore nonstoichiometric having the limiting formula 2M·6C2H4O·46H2O, in which the percentage of M is variable. If M is assumed to be entirely ethylene oxide, as is likely from the method of preparation, the composition of the crystals obtained from an equilibrated aqueous solution of 8 mole % ethylene oxide at 9°C is 6.4C2H4O·46H2O.

Bibliography

McMullan, R. K., & Jeffrey, G. A. (1965). Polyhedral Clathrate Hydrates. IX. Structure of Ethylene Oxide Hydrate. The Journal of Chemical Physics, 42(8), 2725–2732.

Authors 2
  1. Richard K. McMullan (first)
  2. G. A. Jeffrey (additional)
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Dates
Type When
Created 20 years, 7 months ago (Jan. 10, 2005, 10:16 a.m.)
Deposited 1 year, 6 months ago (Feb. 8, 2024, 6:36 p.m.)
Indexed 1 month, 3 weeks ago (July 2, 2025, 1:29 p.m.)
Issued 60 years, 4 months ago (April 15, 1965)
Published 60 years, 4 months ago (April 15, 1965)
Published Print 60 years, 4 months ago (April 15, 1965)
Funders 0

None

@article{McMullan_1965, title={Polyhedral Clathrate Hydrates. IX. Structure of Ethylene Oxide Hydrate}, volume={42}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1703228}, DOI={10.1063/1.1703228}, number={8}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={McMullan, Richard K. and Jeffrey, G. A.}, year={1965}, month=apr, pages={2725–2732} }