Correlation of singlet energies of aromatic hydrocarbons with the rates of protonation of their anion radicals

✍ Scribed by Hahn Levanon; P. Neta; A.M. Trozzolo

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 437 KB
• Volume: 54
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(78)85692-9

✦ Synopsis

formation and protonatron of aromatrc anion radicals in 2-propanol were studred by kinetic spectrophotomctr:c pulse radiolysis. All polycychc hydrocarbons studied were found to react very rapidly wrth c;olv. Those with xlattvely h!gh elcctron affinity were also reduced by (CIls)&O-. The anion radicals formed uudcrgo protonation by direct reaction with the alcohol molecule. The rate constants for this protonation vary from =Z 6 X LO5 s-' for cis-stilbcne .md naphthalene down to 20 s-t for perylenc. The variations in rates arc discussed in terms of changes in siuglct cncrgy separation (GS, + Se). The logarithm of the protonation rate constant for alternant hydrocarbons I hnearly dcpcndcnt on A+,