Rhamnose specific rotation

The literature references given, except for D-glucose and L-rhamnose, cite, so far as possible, the author who first crystallized or synthesized the sugar in pure, crystalline form. Older literature is usually cited in the references given. Unless otherwise noted, the specific rotations are those for dilute, equilibrated, aqueous solutions at 5892.5 A. 

Fig. 4. Effect of pH on the specific rotations [a] of sugar-molybdate complexes. A L-rhamnose(8), B D-xylose(6), C D-galac-tose(7), D D-glucose(5), E D-arabinose(4) (similar to ref. 16).

PS-60 is thus most likely a linear polymer formed from glucuronic acid, glucose and rhamnose. Glucose and rhamnose residues are linked 1,4 and the negative specific rotation ([ol589] = -45 ) indicates that the majority of the glycose units are -1 inked. 

If a-d-rhamnose has a specific rotation of-17°, P-d-rhamnose has a specific rotation of -i-31.5°C, and the specific rotation of the mixture is -i-53, what is the percentage of a and P at equilibrium Draw the structure that predominates at equilibrium. 

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