Gulose
| Structural formula | |||||||||||||||||||
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| Fischer projection , open-chain representation | |||||||||||||||||||
| General | |||||||||||||||||||
| Surname | D - (-) - Gulose, L - (+) - Gulose | ||||||||||||||||||
| other names |
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| Molecular formula | C 6 H 12 O 6 | ||||||||||||||||||
| Brief description |
colorless, viscous liquid |
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| properties | |||||||||||||||||||
| Molar mass | 180.16 g mol −1 | ||||||||||||||||||
| Physical state |
firmly |
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| Melting point |
132 ° C |
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| solubility |
good in water, bad in ethanol |
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| safety instructions | |||||||||||||||||||
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | |||||||||||||||||||
Gulose is a monosaccharide with six carbon atoms, i.e. a hexose . Gulose belongs to the group of non-naturally occurring aldoses .
As with every sugar (except for dihydroxyacetone) there are two enantiomeric forms that relate to each other like image and mirror image, namely D - (-) - gulose and L - (+) - gulose. Whenever “Gulose” is mentioned in this text or in the scientific literature without any additional name ( prefix ), it means D -Gulose.
properties
In aqueous solution, an intramolecular ring closure sometimes occurs, so that an equilibrium is established between the aldehyde form and the two ring forms ( furanose and pyranose ):
| D -Gulose - spellings | ||
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| Wedge formula | Haworth notation | |
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 α- D -Gulofuranose <1% |
 β- D -Gulofuranose <1% |
 α- D- gulopyranose 22% |
 β- D- gulopyranose 78% |
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Individual evidence
- ↑ a b Data sheet L - (+) - Gulose at Acros, accessed on February 19, 2010.
- ↑ Entry on Gulose. In: Römpp Online . Georg Thieme Verlag, accessed on December 28, 2014.
- ↑ a b Data sheet DL-Glyceraldehyde, ≥90% (GC) from Sigma-Aldrich , accessed on February 15, 2013 ( PDF ).
- ↑ Jürg Hunziker: Carbohydrate Chemistry ( Memento from May 10, 2008 in the Internet Archive ), April 1, 2007.
Web links
Commons : Gulose - collection of images, videos and audio files
