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Elektronen-Transfer bei den Reaktionen von Halogen-o-Komplexen des 1,3,5- Tris(1-pyrrolidiny1)benzols mit Nucleophilen
| Content Provider | Semantic Scholar |
|---|---|
| Author | Effenberger, Franz Prof Dr Za, Peter Bauerle |
| Copyright Year | 1990 |
| Abstract | Iodo, bromo, chloro, and thiocyanato a-complexes 4, accessible as crystalline compounds from 1,3,5-tris(l-pyrrolidinyl)benzene (1) with halogens and dirhodan, respectively, react with nucleophiles or bases under dehalogenation, deprotonation, dimerization, or H o-complex formation. The product formation depends on the redox potentials of the o-complexes (acceptors) and the nucleophiles (donors), on the leaving tendency of the substituents on C-1 of the o-complexes, and on the reaction time. The unexpected reactions are interpreted by an electron transfer from the nucleophile YI to the a-complex A+ to give the radical A , a subsequent heterolytic dissociation to the 1,3,5-tris(l-pyrrolidinyl)benzene radical cation C' +, and its follow-up reactions (addition of nucleophiles, dimerization, and H abstraction). The H o-complex 6 results as the most stable final product after long reaction times because of its lowest acceptor properties and the poor nucleofugal leaving tendency of a hydride ion. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://elib.uni-stuttgart.de/bitstream/11682/1138/1/eff196.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
