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Inne
Configurational disorder in oximes: low temperature X-ray single crystal investigations.
Autorzy
Rok wydania
1996
Czasopismo
Journal of Molecular Structure
Numer woluminu
385
Strony
89-98
DOI
10.1016/S0022-2860(96)09405-7
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Crystal structures of three compounds: 1-(3,4-di-O-acetyl-2-deoxy-2-hydroxyimino-α-D-erythro-pentopyranosyl)pyrazole (1), 2-benzoyloxycyclohexanone oxime (2) and ethyl 3,4,6-tri-O-acetyl-2-deoxy-2-hydroxy-imino-α-D-arabino-hexopyranoside (3) were reinvestigated at low temperature (85 K). Difference Fourier maps calculated for crystals 1 and 2 showed unexpected maxima in regions of the oxime groups. The geometric distribution of electron densities in both crystals suggest the presence of ca. 3–5% molecules with an opposite configuration of the oxime group. These molecules have slightly different (turned by ca. 19° and 25°) orientation in crystals.
Słowa kluczowe
Configuration disorder, Oxime, X-ray crystallography
Adres publiczny
https://doi.org/10.1016/S0022-2860(96)09405-7
Strona internetowa wydawcy
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