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J Chem Phys. 2006 Nov 14;125(18):181101.

A direct measurement of the dissociation energy of water.

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1
Laboratoire de Chimie Physique Moléculaire, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.

Abstract

We have performed a direct measurement of one of the most fundamental thermochemical values: the O-H bond energy in water. Using a triple-resonance laser excitation scheme, we excite the molecule through a series of vibrational overtone transitions to access directly the onset of the dissociative continuum. The dissociation energy obtained from our experiments, 41145.94+/-0.15 cm(-1), is approximately 30 times more accurate than the currently accepted value and has important implications for other thermochemical quantities linked to the bond energy of water.

PMID:
17115729
DOI:
10.1063/1.2387163
[Indexed for MEDLINE]
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