Calorimetrische Untersuchungen. Neunundzwanzigste Abhandlung. Hydrirung geschlossener Ringe

Abstract

Eydrirnng geschlossener Ringe ; von (vierte Mittheilung) l) von F. Stohmann und Langbein.

Heats of combustion of organic compounds

“…In the case of 1,4 conjugated systems, the correction factor for each double bond should be not 13, but a smaller value, say 6.5, in agreement with the lower reactivity of these compounds. It is, however, omitted here, for the data at hand do not allow one to draw far-reaching conclusions and are too conflicting.27 This author gives the heat of combustion of cyclohexene as 898.8 kg.-cahs Whether it is for constant volume or constant pressure he does not state, and he gives no experimental details of any kind except that he used the internationally accepted value for benzoic acid.23 Compare values obtained by(215) and(197) for dihydrobenzene.…”