NMR studies of molybdate complexes of d-allose, d-altrose, d-gulose, and d-idose

Aqueous molybdate complexes of d-allose, d-altrose, d-gulose, and d-idose were studied by 1H and 13C NMR spectroscopy. Different amounts of binuclear tetradentate molybdate complexes. involving the hydrated aldehyde group and the three adjacent hydroxyl groups of the hydrate, i.e., HO-2,3,4, were de...

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Bibliographic Details
Published in:Carbohydrate research 1993-12, Vol.250 (2), p.203-209
Main Authors: MATULOVA, M, BILIK, V
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Nuclear resonance and relaxation
Physics
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Summary:Aqueous molybdate complexes of d-allose, d-altrose, d-gulose, and d-idose were studied by 1H and 13C NMR spectroscopy. Different amounts of binuclear tetradentate molybdate complexes. involving the hydrated aldehyde group and the three adjacent hydroxyl groups of the hydrate, i.e., HO-2,3,4, were detected for all the aldoses investigated. In addition, d-altrose and d-idose hydrates preferentially adopt another binuclear tetradentate complex with donor hydroxyl groups HO-2,3,4,5. Both types of binuclear tetradentate molybdate complexes are present in two forms due to a different linkage mode of the asymmetric binuclear molybdate core to the aldose hydrate molecule. Cyclic forms of d-allose and d-gulose predominate in their complexes.
ISSN:0008-6215
1873-426X
DOI:10.1016/0008-6215(93)84001-M