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In the title compound, C18H17FN2O, the imidazole ring makes dihedral angles of 68.81 (6) and 25.20 (8)° with the meth­oxy­phenyl and fluoro­phenyl rings, respectively. The dihedral angle between the meth­oxy­phenyl and fluoro­phenyl ring is 71.89 (6)°. In the crystal, mol­ecules are linked into inversion dimers with an R22(8) graph-set motif by pairs of weak C—H...F inter­actions.

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In the title compound, C23H24F2O3, the central pyran ring has a flat-boat conformation, whereas the two fused cyclo­hexenone rings adopt envelope conformations, with the C atom bearing the dimethyl substituent being the flap atom in each case. The pyran ring mean plane and the di­fluoro­phenyl ring are almost normal to each other, making a dihedral angle of 87.55 (4)°. In the crystal, mol­ecules are linked by pairs of C—H...O hydrogen bonds, forming inversion dimers with an R22(8) ring motif. The F atom at position 2 on the di­fluoro­phenyl ring is disordered over the 2- and 6-positions, and has a refined occupancy ratio of 0.932 (3):0.068 (3).
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