pegasus10 Posted November 19, 2018 Share Posted November 19, 2018 (edited) Hello, is it possible to draw the ring structure of a ketopentose, like for example D-ribulose? I've been browsing the web and some organic chemistry textbooks, but I haven't been able to find anything. Thanks in advance! Edited November 19, 2018 by pegasus10 Link to comment Share on other sites More sharing options...
chenbeier Posted November 19, 2018 Share Posted November 19, 2018 Maybe this: https://www.google.com/search?q=ketopentose+ringform&client=firefox-b&tbm=isch&source=iu&ictx=1&fir=-v76lGvCZRYPvM%3A%2CBx9t22rEqeKo4M%2C_&usg=AI4_-kRdF7ma8ygSKaqu772wrqjAcUGfMQ&sa=X&ved=2ahUKEwihgYq9juHeAhWhw4sKHdtUCi4Q9QEwA3oECAAQCg#imgrc=-v76lGvCZRYPvM: Link to comment Share on other sites More sharing options...
BabcockHall Posted November 24, 2018 Share Posted November 24, 2018 Use the hydroxyl group at carbon-5 to form the hemiacetal. https://commons.wikimedia.org/wiki/File:D-Ribulose_Haworth.svg Link to comment Share on other sites More sharing options...
BabcockHall Posted November 26, 2018 Share Posted November 26, 2018 (edited) On 11/24/2018 at 9:21 AM, BabcockHall said: Use the hydroxyl group at carbon-5 to form the hemiacetal. https://commons.wikimedia.org/wiki/File:D-Ribulose_Haworth.svg That should read hemiketal, not hemiacetal. Edited November 26, 2018 by BabcockHall Link to comment Share on other sites More sharing options...
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