Abstract
In the title compound, 2'-deoxy-7-propynyl-7-deazaadenosine, C14H16N4O3, the torsion angle of the N-glycosylic bond is anti [chi = -130.7 (2) degrees ]. The sugar pucker of the 2'-deoxyribofuranosyl moiety is C2'-endo-C3'-exo, 2T3 (S-type), with P = 185.9 (2) degrees and tau(m) = 39.1 (1) degrees , and the orientation of the exocyclic C4'-C5' bond is -ap (trans). The 7-substituted propynyl group is nearly coplanar with the heterocyclic base moiety. Molecules of the nucleoside form a layered network in which the heterocyclic bases are stacked head-to-tail with a closest distance of 3.197 (1) A. The crystal structure of the nucleoside is stabilized by three intermolecular hydrogen bonds of types N-H... O, O-H... N and O-H... O.
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