## Abstract 1,3‐Dipolar cycloadditon of azomethine ylides with different dipolarophiles leads to the formation of novel heterocyclic spiro compounds having two or more chiral centers. The theoretical studies (HF/3–21G) on the 1,3‐dipolar cycloaddition reaction between ethene and azomethine ylide **
Spectroscopic studies on carbenium ions derived from aromatic olefins—V [1–4] Experimental and theoretical studies of the cations derived from acenaphthylene
✍ Scribed by S.D. Pask; P.H. Plesch
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 318 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
The identification of the cations formed from acenaphthylene is important in the elucidation of the mechanism of its polymerisation. By improved experimental techniques and by MO calculations, some previous assignments of u.v.-vis absorptions to different ions have been corrected and new correlations are suggested. In particular, the absorption of the propagating acenaphthenium ion and of the ion formed by hydride abstraction from dead polymer have been identified.
📜 SIMILAR VOLUMES
## Abstract magnified image Enantiopure (2S)‐N‐(Boc)‐3‐(6‐methylpyridazinyl)alanine (14) has been synthesized to serve as a phenylalanine analog lacking significant π‐donor capability. Two approaches were developed to furnish the target compound from L‐aspartic acid as chiral educt in respectively