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A 1-Oxa-2-nickela-5-cyclopentanone from Ethene and Carbon Dioxide: Preparation, Structure, and Reactivity

✍ Scribed by Prof. Dr. Heinz Hoberg; Dr. Yolande Peres; Prof. Dr. Carl Krüger; Dr. Yi-Hung Tsay

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
303 KB
Volume
26
Category
Article
ISSN
0044-8249

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Reactivity of cyclopentenyl anion analog
Reactivity of cyclopentenyl anion analogous heterocycles: 1,5-electrocyclization of 2-oxa-, 2-thia-, 2-aza- and 2-phosphabicyclo[3.2.0]hept-3-ene. A sigmatropic [1,3] carbon shift
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## Abstract Carbonyl ylide‐like intermediates are involved in the 1,5‐electrocyclization of the bicyclo[3.2.0]heptenes 3a–c. The activation barriers analyzed by the time‐ and temperature‐dependence of the __exo__ ⇌ __endo__ isomerization of specifically deuterated derivatives or of the racemization

Preparation, structure, and reactivity o
Preparation, structure, and reactivity of a new heterocyclic system-1-thio-2,8-diphenyl-2,5,8-triaza-1λ5-phosphabicyclo[3.3.0]octane
✍ Susan Laurens; Vimal V. H. Ichharam; Tomasz A. Modro 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 117 KB

## Abstract A new heterocyclic system, 1‐thio‐2,8‐diphenyl‐2,5,8‐triaza‐1λ^5^‐phosphabicyclo[3.3.0]octane, has been prepared, and its structure was confirmed by single‐crystal X‐ray diffraction. Preliminary reactivity studies demonstrated a complex mechanism for the acid‐catalyzed methanolysis. Gas