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English4-Chloroaniline and its N,N-dimethyl derivative are photostable in cyclohexane but undergo efficient photoheterolysis in polar media via the triplet state and give the corresponding triplet phenyl cations. CASSCF and UB3LYP calculations show that the 4-aminophenyl triplet cation has a planar geometry and is stabilized by >10 kcal mol-1 with respect to the slightly bent singlet. The triplet has a mixed carbene-diradical character at the divalent carbon. This species either adds to the starting substrate forming 5-chloro-2,4¢-diaminodiphenyls
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| Titolo: | Generation and reactivity of the 4-aminophenylcation by photolysis of 4-chloroaniline |
| Autori: | |
| Data di pubblicazione: | 2001 |
| Rivista: | |
| Abstract: | 4-Chloroaniline and its N,N-dimethyl derivative are photostable in cyclohexane but undergo efficient photoheterolysis in polar media via the triplet state and give the corresponding triplet phenyl cations. CASSCF and UB3LYP calculations show that the 4-aminophenyl triplet cation has a planar geometry and is stabilized by >10 kcal mol-1 with respect to the slightly bent singlet. The triplet has a mixed carbene-diradical character at the divalent carbon. This species either adds to the starting substrate forming 5-chloro-2,4¢-diaminodiphenyls |
| Handle: | http://hdl.handle.net/11571/108060 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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