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Determination of the H2ONO+2 and CH3O(H)NO+2 bond strenghts and the proton affinities of nitric acid and methyl nitrate

✍ Scribed by L.S. Sunderlin; Robert R. Squires

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
427 KB
Volume
212
Category
Article
ISSN
0009-2614

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✦ Synopsis

The binding energies of water and methanol to NO: have been measured 10 be 14.8 k 2.3 and 19.2 ? 2.3 kcal/mol, respectively, using energy-resolved collision-induced dissociation of H#-NO: and CH,O( H )-NO: in a flowing afterglow triple quadrupole apparatus. These values are used with literature thermochemistry to derive proton affinities for nitric acid and methyl nitrate: PA(HONOZ) = 177.7 + 2.3 kcal/mol andPA(CHXONOZ) = 175.0f2.5 kcal/mol. Theseresultsarein goodagreement with recent calculations by Lee and Rice, but only the methyl nitrate result is in agreement with experimental results of Cacace and coworkers.

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