ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The enthalpies of formation of 2,7-dimethyl-4,5-benzotropone (I), 2,7 - pentamethylene- 4,5 - benzotropone (III) and 2,7 - dodeca-methylene- 4,5-benzotropone (II) have been determined by combustion calorimetric methods. The loss of 36 kcal/moles in delocalisation energy for III relative to I and II is due to the steric inhibition of coplanarity of the 4,5-benzo-tropone-system in III.
Additional Material:
4 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19560390322