Photoelectron Spectra of Vicinal Tricarbonyls
✍ Scribed by Peter Bischof; Rolf Gleiter; Peter Hofmann
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- German
- Weight
- 611 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
The He I photoelectron spectra of tetramethylcyclopentane‐1,2,3‐trione 1, 4,4,6,6‐tetramethylcyclohexane‐1,2,3‐trione 2, bicyclo[1.2.3]octane‐2,3,4‐trione 3, bicyclo[2.2.3]nonane‐2,3,4‐trione 4 and anhydrous ninhydrine 5 are presented. The assignment of the first two bands is discussed using semiempirical calculations together with a qualitative band shape analysis. It is shown that the first two bands in 1 to 4 are due to the ionization of an electron from lone pair combinations of the 2__p__‐oxygen orbitals.
📜 SIMILAR VOLUMES
We report Xn SW hi0 c&uMions on ($CJHJ)F~(CO), and its tive transition states, formed by xemovmg a half of an electron from each of the f&e uppe~ost f?ed MOs. E~en~ues m the ~ition states depend only sttghtty upon the MO from whrch the "hi-io~ation" occurs. The MOs are more polarized in the trmttion
## Dedicated to Professor Albert Eschenmoser on the occasion of his 75th birthday We have completed the total syntheses of elastase inhibitors YM-47141 and YM-47142, the first natural products containing a vicinal tricarbonyl group. The work establishes the configuration at C(4) of the macrocyclic