Titlebook: Substituent Effects in Radical Chemistry; Heinz G. Viehe,Zdenek Janousek,Robert Merényi Book 1986 D. Reidel Publishing Company, Dordrecht,

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The Contrasting Strain Energies of Small Ring Carbon and Silicon Rings. The Relationship with free opropane. Silicon rehybridization on bonding is much less, and SiH bond stengthening does not compensate for SiSi bond weakening. The CH bond dissociation energies, which are uniquely high in cyclopropane, provide support for this interpretation.

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A Theoretical Approach to Substituent Effects in Radical Chemistry,approach to the electronic structure and react vity of chemical species allowed us to generalize the Linnett theory and to describe the mechanism of various processes involving free radicals. We have also proposed a general definition of the concept of stabilization energy applying to any compound.

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Sigma and PI Effects in Radicals, electron sigma bond energies are found to be strongly dependent on the energy match between the interacting orbitals. Odd electron pi-bonds are strong for radical ions involving first row elements, but weak for neutral radicals and bonds between second row elements. The principles deduced from thes

Collision

The Contrasting Strain Energies of Small Ring Carbon and Silicon Rings. The Relationship with free he latter and rehybridization in the former. The weakness of the CC bonds in cyclopropane is compensated somewhat by CH bond strengthening. In silicon rings, angle deformation effects dominate, and trisilacyclopropane is much more strained than tetra- silacyclobutane and even more strained than cycl

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MULTI

ESR-Spectroscopical Investigation of Capto-Dative Substituent Effects in Benzyl Radicals,ed in terms of substituent-induced spin delocalization. On the basis of the dependence of radical stabilization on spin delocalization it is concluded that capto-dative substitution implies a synergetic substituent effect on radical stabilization, whereas antagonistic effects are observed in the cas