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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