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Homework Help: Stereoisomers aldoheptose

  1. Oct 11, 2008 #1
    Just to check that I've understood the concept of isomerism:

    1. The problem statement, all variables and given/known data

    How many stereoisomers are possible for

    a) a 2-ketoheptose
    b) an aldoheptose
    c) a ketotriose

    2. The attempt at a solution

    a) First: does the "2" mean that the carbonyl carbon is the second C-atom?

    The molecule has 4 asymmetric centers and hence 2^4 = 16 possible stereoisomers.

    b) 5 asymmetric centers, so 2^5 = 32 possible stereoisomers

    c) No asymmetric centers, therefore 2^0 = 1 possible stereoisomer

  2. jcsd
  3. Oct 11, 2008 #2


    User Avatar

    Staff: Mentor

    Re: Stereoisomers

    Looks OK to me, but second opinion won't hurt.
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