Qhia: Epimers yog cov sib txuas uas yog optical isomers ntawm ib leeg vim lawv txawv ntawm ib leeg los ntawm kev teeb tsa ntawm pawg lossis atom ntawm ib qho atom carbon. D-galactose thiab D-mannose yog epimer ntawm D-glucose.
YPuas yog galactose thiab mannose epimers?
Ans: Epimers yog cov monosaccharides uas txawv tsuas yog hauv kev teeb tsa ib ncig ntawm ib qho atom carbon. … Yog li, D-mannose thiab D-galactose yog epimers ntawm qabzib. Tab sis galactose thiab mannose tsis yog epimers raws li kev taw qhia ntawm hydrogen thiab hydroxyl pawg sib txawv nyob ib ncig ntawm ob lub atoms, piv txwv li C-2 thiab C-4.
Koj puas tuaj yeem faib D-mannose thiab D-glucose ua epimers?
Tam sim no, diastereomers uas txawv hauv kev teeb tsa ntawm ib qho chaw chiral hu ua epimers. … Yog li, D-Glucose thiab D-mannose yog epimers thiab qhia meej, peb tuaj yeem hais tias lawv yog epimeric ntawm carbon-2.
Vim li cas D-mannose thiab D-glucose yog epimers?
D-Mannose yog ib qho epimer ntawm D-glucose vim ob lub suab thaj sib txawv tsuas yog hauv kev teeb tsa ntawm C-2. Thaum lub molecule xws li qabzib hloov mus rau hauv daim ntawv cyclic, nws tsim ib qho chaw tshiab chiral ntawm C-1. Cov pa roj carbon atom uas tsim cov chaw tshiab chiral (C-1) hu ua anomeric carbon.
Puas yog mannose thiab galactose enantiomers?
Lawv tsis yog enantiomers, lossis diastereomers, lossis isomers, lawv yog tsuas yog epimers.
