PH-Triazaphosphorine
| Autor: | Joachim Ebeling, Marco Avitabile Leva, Herbert Stary, Alfred Schmidpeter |
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| Rok vydání: | 1971 |
| Předmět: | |
| Zdroj: | Zeitschrift für Naturforschung B. 26:650-655 |
| ISSN: | 1865-7117 0932-0776 |
| DOI: | 10.1515/znb-1971-0705 |
| Popis: | Equimolar mixtures of a biguanide and a diphenylphosphonite on heating under reduced pressure split off 2 moles of phenol. As products cyclic phosphazanes 3 were to be expected. Instead they undergo a hydrogen shift from N to P to give 2-hydrogen-2-alkyl-4.6-diamino-1.3.5.2-triazaphosphorines (4). This is taken as evidence that a phosphazene π-bond may well become part of a cyclic delocalised system and thus contribute substantially more to stabilize the PH-tautomer than an isolated one. Carbonyl compounds add readily to the PH-bond, CCl4 substitutes the hydrogen for chlorine, which in turn may be displaced by alkoxy and amino groups. 31P- and 1H-NMR data, especially the PH- and PD-coupling patterns sustain the assigned structures. |
| Databáze: | OpenAIRE |
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