Conformational studies on cycloamyloses

Sundararajan, P. R. ; Rao, V. S. R. (1970) Conformational studies on cycloamyloses Carbohydrate Research, 13 (3). pp. 351-358. ISSN 0008-6215

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The "non-bonded" interaction energies have been computed for cyclohexaamylose, cycloheptaamylose, cyclooctaamylose. From hydrogen-bond criteria the conformation having an angle of 119° at the bridge oxygen atom is preferred for cyclohexaamylose. It is also shown that cycloamyloses having fewer than six D -glucose residues could not be cyclized because of steric overlaps. Out of three possible cyclic compounds, cyclohexaamylose has the lowest energy. Cyclohexa-, -hepta-, and -octa-amyloses are stabilized by the formation of intramolecular hydrogen bonds between contiguous D -glucose residues. These intramolecular hydrogen bonds are stronger in the hepta- and octa-amyloses than in the hexaamylose.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:53054
Deposited On:04 Aug 2011 14:51
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