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2-Acetamido-2-de-oxy-3-O-?-d-galactopyranosyl-d-glucose dihydrate.

ABSTRACT: In the title compound, C(14)H(25)NO(11)·2H(2)O, the primary hydroxyl group connected to the anomeric C atom of the N-acetyl-?-d-glucopyran-ose residue exhibits positional disorder, with occupancy factors for the ? and ? anomers of 0.77 and 0.23, respectively. The two torsion angles (? and ?) and the bridge angle (?) that describe conformation of the glycosidic linkage between the galactopyran-ose and glucopyran-ose rings are ? = -81.6?(3)°, ? = 118.1?(2)° and ? = 115.2?(2)°. Two water mol-ecules stabilize the mol-ecular packing by forming hydrogen bonds with the saccharide residues.

SUBMITTER: Wada M 

PROVIDER: S-EPMC2977301 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature

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2-Acetamido-2-de-oxy-3-O-β-d-galactopyranosyl-d-glucose dihydrate.

Wada Masahisa M   Kobayashi Kayoko K   Nishimoto Mamoru M   Kitaoka Motomitsu M   Noguchi Keiichi K  

Acta crystallographica. Section E, Structure reports online 20090704 Pt 8

In the title compound, C(14)H(25)NO(11)·2H(2)O, the primary hydroxyl group connected to the anomeric C atom of the N-acetyl-β-d-glucopyran-ose residue exhibits positional disorder, with occupancy factors for the α and β anomers of 0.77 and 0.23, respectively. The two torsion angles (Φ and Ψ) and the bridge angle (τ) that describe conformation of the glycosidic linkage between the galactopyran-ose and glucopyran-ose rings are Φ = -81.6 (3)°, Ψ = 118.1 (2)° and τ = 115.2 (2)°. Two water mol-ecules  ...[more]

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