2.1 Inorganic free radicals and radical ions

Neutral Peptide Biradicals Formed by Dissociative Electron Transfer

“…The emissive transitions are assigned to the tyrosyl radical, while the strong absorptive single line is due to e - solv . The simulation on the right-hand side, which uses literature values for the hyperfine coupling constants and g -factors, , confirms this assignment. The emissive/absorptive (E/A) CIDEP pattern is consistent with a triplet precursor and negative exchange interaction in the radical pair.…”

Reactions in molecular inclusion complexes. 5. Differentiation between reaction pathways in the photoaddition of guest p-fluoroacetophenone to host deoxycholic acid via x-ray analysis of a complex undergoing a single-crystal-to-single-crystal transformation

“…(10) Frolow, F, to be published. (11) The structure of the irradiated crystal (containing DCA, guest and product PFDCA) was determined via constrained least squares on X-ray diffraction data measured at -170 °C. The cell constants at -170 °C are a = 25.155 (7) k,b = 13.679 (6) k, c = 7.135 (2) A, space group ^212121.…”

Stereochemistry of the reactions of lithium di-tert-butylbiphenyl with alkyl halides

“…Such radicals run the gamut from essentially planar to fairly pyramidal. 21 The electron transfer would again be expected to be very rapid. In addition to the favorable feature that only one charged species is involved in the encounter complex, the model reaction of the diffusion-controlled rate of sodiumnaphthalene (as a loose ion pair) with a primary radical suggests that in reactions of this type, bond distortions and solvent reorganization are not important in proceeding to the transition state.22 In addition, even with an electron transfer to a secondary rather than a primary radical, transfer of the electron is expected to be exergonic.…”