17618-97-2Relevant academic research and scientific papers
An Experimental Approach to the C8H10 Hypersurface. Kinetic and Thermochemical Investigations on a Formally Forbidden Ground-state <2? + 2?) Cycloaddition
Hassenrueck, Karin,Martin, Hans-Dieter,Mayer, Bernhard,Urbanek, Thomas,Zirwes, Thomas,et al.
, p. 177 - 186 (2007/10/02)
The C8H10 hydrocarbons 1, 3, 4, and 6 have been thermolyzed in a static system and the Arrhenius parameters have been obtained.Calorimetric measurements have been carried out to determine the heats of formation.From these data an experimental energy hypersurface is constructed which shows the following remarkable features: 1) The ground-state energy of endo-1 is higher than that of exo-4 by 8 kcal/mol. 2) The predominant reaction pathway of endo-1 is the formally forbidden 6 and 4->3 are the same, the reaction yielding 6 is faster due to a sizeably higher A factor. 4) The tetracycle 3 chooses the microscopic reverse pathway, i.e. its thermolysis proceeds via exo-4 to give the diene 6.
The Reductive Decyclizations of Semibullvalene
Goldstein, Melvin J.,Wenzel, Timothy T.
, p. 1654 - 1655 (2007/10/02)
Reduction of semibullvalene (5) with potassium more closely resembles deprotonation of tetrahydropentalenes by n-butyl-lithium-potassium t-pentoxide than it does the reduction of (5) with lithium; the former processes both provide the cyclo-octatetraenyl dianion (4), plausibly via the intermediate bicyclooctadienediyl dianion (3).
MECHANISM OF THE THERMAL CONVERSION OF TETRACYCLO(3.3.0.02,4.03.6)OCT-7-ENE INTO DIHYDROPENTALENES
Stapersma, J.,Rood, I. D. C.,Klumpp, G. W.
, p. 2201 - 2212 (2007/10/02)
One of a number of possible mechanisms has been established for the title reaction.
