Direct measure of the hydration number of aqueous methane

Steven F Dec; Kristin E Bowler; Laura L Stadterman; Carolyn A Koh; E Dendy Sloan Jr

doi:10.1021/ja055283f

Direct measure of the hydration number of aqueous methane

J Am Chem Soc. 2006 Jan 18;128(2):414-5. doi: 10.1021/ja055283f.

Authors

Steven F Dec¹, Kristin E Bowler, Laura L Stadterman, Carolyn A Koh, E Dendy Sloan Jr

Affiliation

¹ Center for Research on Hydrates, Department of Chemical Engineering, Colorado School of Mines, Golden, 80401, USA. scdec@mines.edu

PMID: 16402820
DOI: 10.1021/ja055283f

Abstract

A hydration number of 20 has been measured for aqueous CH4 in the temperature range 273-298 K on the basis of the simultaneous observation of the 13C isotropic resonance lines of CH4 in both aqueous solution and the dodecahedral cage of CH4 structure I hydrate. Additional experimental evidence and analysis reported in this paper suggest that the dominant aqueous hydration number of methane is 20.