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In the title compound, C15H11BrO3, the dihedral angle between the naphtho­furan ring system (r.m.s. deviation = 0.022 Å) and the side chain is 4.50 (2)°. In the crystal, short Br...Br [3.4435 (7) Å] contacts propagating along [010] in a zigzag manner and weak π–π inter­actions [shortest centroid–centroid separation = 3.573 (2) Å] directedalong [100] are observed.

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In the title compound, C14H14BrNO5, the ester group is disordered [occupancy ratio 0.52 (2):0.48 (2)]. The major component is nearly coplanar with the benzofuran plane, subtending a dihedral angle of 7.84 (2)°, while the amide group is twisted out of the benzofuran plane making a dihedral angle of 39.69 (2)°. An intra­molecular N—H...O hydrogen bond occurs. In the crystal, pairs of weak C—H...O hydrogen bonds link the mol­ecules into inversion dimers, which are further linked via strong N—H...O hydrogen bonds, generating a zigzag chain extending along [100].

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The title compound, C11H10BrNO3, is close to planar with the benzo­furan unit and the ester group subtending a dihedral angle of 5.25 (2)°. The mol­ecular structure features an intra­molecular N—H...O inter­action. In the crystal, N—H...O hydrogen bonds involving carboxyl O-atom acceptors generate a chain extending along [201].
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