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H A LEVY

Publications and source records attributed to H A LEVY.

16 recordsLinked to original sources
PubMed1965

ALPHA-D-GLUCOSE: PRECISE DETERMINATION OF CRYSTAL AND MOLECULAR STRUCTURE BY NEUTRON-DIFFRACTION ANALYSIS.

This analysis provides the first precise crystal and molecular structural parameters for alpha-D-glucose. The C-C, C-H, and O-H bond lengths deviate only slightly from their means of 1.523 A, 1.098 A, and 0.968 A. The C(1)-O(1) bond length, 1.389 A, is significantly shorter than the mean value, 1.420 A, of the other C-O bonds. The valence angle of the ring oxygen is 113.8 degrees.

Biophysical Phenomena↗
PubMed1963

SUCROSE: PRECISE DETERMINATION OF CRYSTAL AND MOLECULAR STRUCTURE BY NEUTRON DIFFRACTION.

This analysis provides the first precise molecular parameters for sucrose. All hydrogen atoms are included. Carbon-carbon distances are 1.51 1.53 A; carbon-oxygen 1.40 to 1.44 A; carbon-hydrogen 1.08 to 1.11 A; oxygen-hydrogen 0.94 to 0.99 A. The furanose ring conformation differs from that in sucrose sodium bromide dihydrate. Hydrogen bonds (two of them intramolecular) utilize every hydroxyl group except one.

Crystallography↗