Synthesis, Crystal Structure, and Physical Properties of Sterically Unprotected Hydrocarbon Radicals
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We have prepared and isolated neutral polycyclic hydrocarbon radicals. A butyl-substituted radical gave single crystals, in which a π-dimeric structure, not a σ-bonded dimer, was observed, even though steric protection was absent. Thermodynamic stabilization due to the highly spin-delocalized structure contributes effectively to the suppression of σ-bond formation.
创建时间：
2016-02-23
