Liebigs Annalen p. 1691 - 1695 (1996)
Update date:2022-08-02
Topics:
Roth, Wolfgang R.
Hopf, Henning
Wasser, Thorsten
Zimmermann, Heiko
Werner, Christian
The energy profile of the Bergman equilibrium o-diethinylbenzene (1) ? 1,4-didehydronaphthalene (2) has been established from the temperature and NO dependence of the trapping rate of the diradicals 2 which leads to a heat of formation for 2 of ΔHf0 = 152.9 ± 1.4 kcal·mol-1. Activation parameters for the hydrogen abstraction of 2 and 1,4-didehydrobenzene (5) have been derived from the rate of the naphthalene and benzene formation, when 1 and cis-3-hexene-1,5-diyne (4) are heated in the presence of methanol, toluene, and 1,4-cyclohexadiene. VCH Verlagsgesellschaft mbH, 1996.
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