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- W2076496265 abstract "Starting with appropriate alkylnaphthalenes, 3,10-dimethyl- 2,3,10-diethyl- 3, 2,3,10,11-tetramethyl- 4 and3,4,9,10-tetramethyl-perylene 5 were synthesized by a sequence ofradical cation and radical anion coupling steps. Persistent oxidationdications of parent perylene 1, alkylperylenes 2–5 anddibenzo[cd,lm]perylene 6 were generated inSbF5–SO2ClF.Based on 1D- and 2D-NMR experiments combined with AMlcalculations the charge delocalization mode in the dications wasdeduced. The total deshielding(ΣΔδ13C), substituenteffects, conformational/geometrical changes and tropicity in thedications are examined.Whereas alkylperylene dications represent 18π electronHuckel dictations with a diamagnetic ring current (more diatropicthan their neutral precursors), the 24π (20π periphery) dicationof dibenzoperylene exhibits a paramagnetic ring current which greatlyshields its protons (more paratropic than neutral hydrocarbon)." @default.
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- W2076496265 date "1997-01-01" @default.
- W2076496265 modified "2023-09-25" @default.
- W2076496265 title "Persistent oxidation dications of dialkyl- and tetraalkyl-perylenes and dibenzo[cd,lm]perylene; charge distribution mode, substituent effects and conformational aspects" @default.
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- W2076496265 doi "https://doi.org/10.1039/a608342k" @default.
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