The crystal and molecular structure of tetrahydrofuranyluracil

Abstract

Crystals of the title compound, C₈H₁₀N₂O₃, are monoclinic, a= 11.554(5), b= 14.403(7), c= 5.092(3)Å, β= 100.64(4)° at 20°C, space group P^2₁/n, Z= 4. Structure refined with least squares (1 507 reflections) at R 4.2%. The tetrahydrofuranyl ring has an N-conformation [C(3′)endo–C(2′)exo] with pseudorotation angle P 0.3° and ϕ_max. 37.3°. The uracil base has an anti-orientation (χ 15.4°) with respect to the five-membered ring. Two uracil rings at a distance of 3.37 Å, are perfectly stacked via a centre of symmetry.