BICYCLIC IODO-TETRACHALCOGENA-TRIPHOSPHA-HEPTANES
Autor(en): | LONNECKE, P BLACHNIK, R TATTERSHALL, BW |
Stichwörter: | BICYCLIC IODO-TETRACHALCOGENATRIPHOSPHAHEPTANES; Chemistry; Chemistry, Inorganic & Nuclear; INTRAMOLECULAR EXCHANGE; IODO-DITHIADISELENATRIPHOSPHABICYCLO[2.2.1]HEPTANE; IODO-TETRASELENATRIPHOSPHABICYCLO[2.2.1]HEPTANE; IODO-THIATRISELENATRIPHOSPHABICYCLO[2.2.1]HEPTANE; MAGNETIC-RESONANCE SPECTRA; MOLECULES; P-31; P-31-NMR SE-77-NMR; PHOSPHORUS; SELENIUM; SULFUR; THIATETRASELENADIPHOSPHABICYCLO[2.2.1]HEPTANE | Erscheinungsdatum: | 1994 | Herausgeber: | JOHANN AMBROSIUS BARTH VERLAG | Journal: | ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | Volumen: | 620 | Ausgabe: | 6 | Startseite: | 1115 | Seitenende: | 1124 | Zusammenfassung: | The compounds P3Se4-nSnI (n = 0, 1, 2) have been identified by P-31 nmr spectroscopy. They were prepared by a direct thermal reaction of red phosphorus, sulfur, selenium and iodine in the stoichiometric ratio. These iodides could be converted into corresponding bromides and chlorides by substitution reactions. All molecules show a diselenium bridge in which, in contrast to the other selenium positions, selenium could not be replaced by sulfur. Similar effects were observed for the diselenium bridges of P2Se5. Systematic changes of the chemical shifts and coupling constants are caused by alterations in the molecular geometry, either by replacement of selenium by sulfur, or of iodine by more electronegative ligands. An intramolecular exchange reaction is observed for all molecules. |
ISSN: | 00442313 | DOI: | 10.1002/zaac.19946200628 |
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geprüft am 18.05.2024