ISSN:
0894-3230
Schlagwort(e):
Chemistry
;
Theoretical, Physical and Computational Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
Previously unknown 1,3-dioxenium perchlorates were obtained by coupling 1,3-diketones with aliphatic ketones in an acetic acid solution of perchloric acid. The dioxenium ring of 4,6-bis(p-methoxystyryl)-2,2-pentamethylenespiro-1,3-dioxenium perchlorate in the crystal possesses the envelope conformation, the geometry of the carbon triad being close to that of the allyl cations. Variable-temperature 1H NMR spectra of unsymmetrical 1,3-dioxenium cations revealed the occurrence of a sufficiently fast enantiotopomerization process governed by the C(SINGLE BOND)O bond dissociation-recombination mechanism.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
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