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Reactions of saccharides catalyzed by molybdate ions. XIX. Molybdate complexes and epimerization of aldoses as a function of pH

V. Bílik, L. Petruš, and J. Zemek

Institute of Chemistry, Slovak Academy of Sciences, 809 33 Bratislava


Abstract: In the presence of molybdate ions, aldoses exhibited extremum values of sp. rotation in pH range 2.6-6.8; 30 of the tested aldoses showed extremum values at pH 5.5-6 and some of them also at pH 3-4. The rate of epimerization of aldoses catalyzed by molybdate ions achieved a max. at pH 2.5-3.5 and decreased with increasing pH; the rate of epimerization of D-glucose at pH 5.9 was 5 times slower than at pH 2.9 and the rate of epimerization of D-mannose decreased by 20 times.

Full paper in Portable Document Format: 322a242.pdf


Chemical Papers 32 (2) 242–251 (1978)

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