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Dissociation energy of the benzenewater van der Waals complex

✍ Scribed by B.-M. Cheng; J.R. Grover; E.A. Walters

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
393 KB
Volume
232
Category
Article
ISSN
0009-2614

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✦ Synopsis

The dissociation energy of the complex C6H6'H20 was determined by the threshold difference method. These complexes were produced in molecular beams via the expansion of a mixture of helium, and benzene and water vapors in the ratio of 96: 3: 1.

The method requires the ionization potential of C6H 6 and the appearance potential of C6H f from C6H6"H20, the difference between which is the dissociation energy. The necessary values are 9.246 and 9.344+0.012 eV, respectively, from which D(C6H~.H20) = 0.098 _+ 0.012 eV = 2.25 _+ 0.28 kcal mol-'. The ionization potential of C6H 6'H20 is 9.170 _+ 0.014 eV, which leads to the dissociation energy of the complex ion of D ( [ C6H 6"H20 ] + ) = 4.0 _+ 0.4 kcal mol-~.

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