Hydrocarbons rings

Examine the following thermochemical data pertaining to hydrogenation of unsaturated eight-membered ring hydrocarbons to give cyclooctane ... 

Comparisons of the ultra-violet absorption spectra of the four hydrocarbons have been made with those of a series of condensed ring hydrocarbons and it is tentatively concluded that they may be derivatives of either epeiopentenophenanthrene or epeZopentenofluorene. All four hydrocarbons give a colour reaction in the Vanseheidt test. ... 

Gleiter, R. Photoelectron Spectra and Bonding in Small Ring Hydrocarbons. 86, 197-285 (1979). 

Protonation and solvation in strong aqueous acids, 13, 83 Protonation sites in ambident conjugated systems, 11, 267 Pseudorotation in isomerization of pentavalent phosphorus compounds, 9, 25 Pyrolysis, gas-phase, of small-ring hydrocarbons, 4, 147... 

Osborn, A. G., Douslin, D. R. (1975) Vapor pressures and derived enthalpies of vaporization of some condensed-ring hydrocarbons. J. Chem. Eng. Data 20, 229-231. 

Metallocyclobutanes from cyclopropanes have been frequently invoked in transition metal-catalyzed rearrangements of strained ring hydrocarbons, and this body of chemistry is quite rich and diverse, as evidenced in the excellent review by Bishop (72). Because of this diversity, the significance of isolated observations should not be overstated nevertheless, certain reactions outlined by Bishop are closely related to the carbene retroadditions reported by Gassman and co-workers using metathesis catalysts. 

Gas-phase nucleophilic displacement reactions, 21, 197 Gas-phase pyrolysis of small-ring hydrocarbons, 4, 147 Gas-phase reactions of organic anions, 24, 1... 

That the also produced eight-membered ring hydrocarbon 316 is a (thermal) secondary product was shown by repetition of the reaction at room temperature, where the relative amount of 316 had increased significantly at the expense of the ds-isomer 313. 

THE GAS PHASE PYROLYSES OF SOME SMALL RING HYDROCARBONS... 

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