Tetralin disproportionation from

Table V presents a list of estimated enthalpies and half lives for molecular H-atom transfer (disproportionation) from tetralin to a number of unsaturated molecules. At 450°C, and even at 400°C, many structures will undergo rapid molecular disproportionation with tetralin. Approximate relative rates at 400°C for H-atom donation by molecular disproportionation for selected hydrogen donors are estimated below (sources for thermochemistry are given in footnote 1 of Table IV) ...

Formation of Free Radicals by Molecular Disproportionation. A significant conclusion that may be drawn from considerations of rate and equilibrium constants for molecular disproportionation is that this path can provide appreciable concentrations of free radicals in many systems long after most weak chemical bonds have ruptured and bond homolysis has ceased to be a major source of free radicals. In "pure tetralin, for instance, trace concentrations of 1,2-dihydronaphthalene are expected to equilibrate with tetralin and tetralyl radicals,... 

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