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Enthalpy of formation of benzo[k]fluoranthene

✍ Scribed by Hermı́nio P. Diogo; Manuel E. Minas da Piedade

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
171 KB
Volume
34
Category
Article
ISSN
0021-9614

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✦ Synopsis

The standard molar enthalpy of formation of benzo [k]fluoranthene, (CAS number 207-08-9) in the crystalline state, at T = 298.15 K, was determined as f H o m (C 20 H 12 , cr) = (172.4 ± 4.3) kJ • mol -1 , by micro-combustion calorimetry. Vapour pressure against temperature measurements recorded using the Knudsen effusion method led to g cr H o m (C 20 H 12 ) = (124.2±4.7) kJ • mol -1 , at T = 298.15 K and hence f H o m (C 20 H 12 , g) = (296.6 ± 6.4) kJ • mol -1 , at T = 298.15 K. The results reported in this work show that, in terms of the homodesmotic stabilization enthalpy criteria, benzo [k]fluoranthene is an aromatic compound, in agreement with the evidence from 1 H-NMR spectroscopy, and the prediction by Craig's rules.

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