Key indicators: single-crystal X-ray study; T = 298 K; mean (C-C) = 0.005 Å; R factor = 0.059; wR factor = 0.153; data-to-parameter ratio = 15.9.In the title compound, C 13 H 15 FN 2 S, the dihydropyrimidine ring is essentially planar, with a maximum deviation of 0.086 (3) Å from the mean plane of the rest of the ring for the dimethylated C atom. The benzene ring is almost perpendicular to the dihydropyrimidine ring, with a dihedral angle of 83.97 (14) . The crystal packing is characterized by centrosymmetric dimers resulting from pairs of intermolecular N-HÁ Á ÁS hydrogen bonds. There are also C-HÁ Á Á interactions.
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ExperimentalCrystal data
Great interests in metallic oxides have emerged because of the possibility to modify the properties of these materials for different applications such as catalysis or sensors. In this work, CuO, ZnO and CuO-ZnO nanoparticles were prepared by a novel sol-gel route under ultrasonic condition using triethanolamine as an emulsifying surfactant. Fine powders were obtained when the pH of the sols were increased to 13 using NaOH. Particle sizes of the produced oxide materials were in the range of 3-4 nm, 40-50 x 100-150 nm (diameter x length) and 100-200 nm for CuO, ZnO and CuO-ZnO, respectively. The molar ratio of triethanolamine to metal nitrate precursors was set at 2:3. TEM micrographs of these particles were obtained to elucidate the morphology of the nanoparticles. Experimental results show that the band gap energies (Eg) for CuO, ZnO and CuO-ZnO were found to be 2.71, 3.35 and 2.82 eV, respectively.
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