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Localized vs. collective electrons

The present results clearly establish the D parameter of localized triplet diradicals as a reliable spectral tool to probe for electronic factors that control spin delocalization and radical stabilization in the benzyl-type radicals 14. Equation (8) offers us the opportunity to interpret the experimental results through semiempirical MO calculations in terms of the theoretically accessible a-spin-density variations. The spectroscopic AD scale does not suffer from the limitations (polar vs. radical contributions) inherent in the kinetic chemical scales and provides us with over 40 aryl substituents, which is the most comprehensive collection of electronic effects on radicals. Its extension to heteroaryl-substituted diradicals (12) provides for the first time a quantitative experimental measure of delocalization in aromatic n systems. The salient features of this novel method are... [Pg.249]

See other pages where Localized vs. collective electrons is mentioned: [Pg.266]    [Pg.266]    [Pg.305]    [Pg.3271]    [Pg.327]    [Pg.313]    [Pg.316]    [Pg.648]    [Pg.506]   
See also in sourсe #XX -- [ Pg.17 , Pg.18 , Pg.19 , Pg.20 , Pg.21 , Pg.22 , Pg.23 , Pg.24 , Pg.25 , Pg.26 , Pg.27 , Pg.70 , Pg.71 , Pg.157 , Pg.158 , Pg.159 , Pg.249 , Pg.250 , Pg.251 , Pg.252 , Pg.253 , Pg.254 , Pg.276 , Pg.277 , Pg.278 , Pg.285 , Pg.295 , Pg.296 ]



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Collective electron

Electron localization

Localizing electrons

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