This preview shows page 1. Sign up to view the full content.
Unformatted text preview: (although they are not of course optical enantiomorphs, as the above formulae show): the optical rotation of each solution changes slowly on stand-ing, and the final value attained is identical in each case, i.e. . a mixture of both forms in equilibrium is ultimately obtained from either a or p-glucose. The difference between a- and (3-glucose disappears in the straight chain form (III), and since it is in this form that glucose often appears to react, this difference between the a and P forms can often be ignored in practical work. Fructose exists similarly in two forms, determined by the disposition of the OH and * Structures (I), (II) and (IV) are convenient projection formulae; formulae such as (IV) and (VII) are more realistic representations, but even these are only approximations as the rings are not flat....
View Full Document
This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.
- Fall '06
- Organic chemistry