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The structure of sugar osazones

โœ Scribed by L. Mester; E. Moczar; J. Parello


Publisher
Elsevier Science
Year
1964
Tongue
French
Weight
325 KB
Volume
5
Category
Article
ISSN
0040-4039

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โœฆ Synopsis


The structure of sugar osazones and related compounds wa: long time controversial. Fieser and Fieser (1) on theoretical grounds propose1 two alternate chelate structures i and j , these being stabilized by their ability to exist in the resonance forms i' and j'.


๐Ÿ“œ SIMILAR VOLUMES


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Sugar osazones (1,2) and their acetates have circular dichroism spectra with multiple Cotton effects, showing three typical bands. Band I is located between 340 and 420 nm, with a negative Cotton effect, when the C-3 hydroxyl is to the e in the Fischerformula. Band II is located between 240 and 340

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## Dedicated to Professor Fritz Micheel on the occasion of his 65th birthday The open-chain chelate structure of sugar osazones, first proposed by Fieser and Fieser, has now been confirmed by chemical methods, X-ray analysis, and NMR spectroscopy. These investigations showed that the properties of