Single-crystal X-ray study T = 190 K Mean '(C±C) = 0.002 A Ê R factor = 0.031 wR factor = 0.078 Data-to-parameter ratio = 12.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
2-C-Methyl-3,4-O-methylidene-d-arabinono-1,5-lactone
✍ Scribed by Bream, Richard ;Watkin, David J. ;Jones, Nigel A. ;Jenkinson, Sarah F. ;Fleet, George W. J.
- Publisher
- International Union of Crystallography
- Year
- 2006
- Tongue
- English
- Weight
- 384 KB
- Volume
- 62
- Category
- Article
- ISSN
- 1600-5368
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The relative configuration at C-2 of 2,4-dimethyl-3,4-__O__-isopropylidene-L-arabinono lactone, C~10~H~16~O~5~, which exists in the boat form, was unequivocally established by X-ray crystallographic analysis. The absolute configuration was determined by the use of 2-__C__-methyl-D-ribonolactone as a
X-ray crystallographic analysis firmly establishes the ribo stereochemistry and the unusual boat conformation of the title branched carbon chain lactone, C 9 H 13 N 3 O 4 , arising from an unexpected rearrangement in the nucleophilic substitution of a trifluoromethanesulfonate. There are two molecul
Single-crystal X-ray study T = 120 K Mean '(C±C) = 0.004 A Ê R factor = 0.045 wR factor = 0.102 Data-to-parameter ratio = 11.0 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.