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2,3:4,6-Di-O-isopro...
2,3:4,6-Di-O-isopropylidene-α-L-sorbofuranose and 2,3-O-isopropylidene-α-L-sorbofuranose
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- Langer, Vratislav, 1949 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Steiner, Bohumil (författare)
- Slovak Academy of Sciences
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- Koos, Miroslav (författare)
- Slovak Academy of Sciences
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(creator_code:org_t)
- 2009
- 2009
- Engelska.
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Ingår i: Acta Crystallographica Section C: Crystal Structure Communications. - 0108-2701 .- 1600-5759. ; C65:4, s. o151-o154
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In the title compounds, C12H20O6, (I), and C9H16O6, (II), the five-membered furanose ring adopts a 4T3 conformation and the five-membered 1,3-dioxolane ring adopts an E3 conformation. The six-membered 1,3-dioxane ring in (I) adopts an almost ideal OC3 conformation. The hydrogen-bonding patterns for these compounds differ substantially: (I) features just one intramolecular O-H...O hydrogen bond [O...O = 2.933 (3)Å], whereas (II) exhibits, apart from the corresponding intramolecular O-H...O hydrogen bond [O...O = 2.7638 (13)Å], two intermolecular bonds of this type [O...O = 2.7708(13) and 2.7730(12) Å]. This study illustrates both the similarity between the conformations of furanose, 1,3-dioxolane and 1,3-dioxane rings in analogous isopropylidene-substituted carbohydrate structures and the only negligible influence of the presence of a 1,3-dioxane ring on the conformations of furanose and 1,3-dioxolane rings. In addition, in comparison with reported analogs, replacement of the -CH2OH group at the C1-furanose position by another group can considerably affect the conformation of the 1,3-dioxolane ring.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
Nyckelord
- X-ray structure determination
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- ref (ämneskategori)
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