Abstract

2-Deoxy-β- d- lyxo-hexose (2-deoxy-β- d-galactose, C 6H 12O 5), M r = 164.16, is monoclinic, P2 1 with a = 9.811(1), b = 6.953(1), c = 5.315(1) Å, β = 91.58(2)°, V = 362.5(1) Å 3, Z = 2, and D x = 1.504 g.cm −3. The structure was solved by direct methods (MULTAN 79) and refined to R = 0.032 for 800 observed reflections. Each hydroxyl oxygen, acting both as donor and acceptor, is involved in a hydrogen-bonding system, which consists of infinite helical chains around the crystallographic screw axes. Moreover, weak interactions allow the incorporation of the ring-oxygen atoms into an interconnected network.

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