(E)-1-Ferrocenyl-3-[2-(2-hy­droxy­eth­oxy)phen­yl]prop-2-en-1-one

In the title compound, [Fe(C₅H₅)(C₁₆H₁₅O₃)], the cyclo­penta­dienyl rings are in an eclipsed conformation and the benzene ring makes dihedral angles of 10.84 (9) and 12.35 (9)°, respectively, with the substituted and unsubstituted cyclo­penta­dienyl rings. In the crystal, mol­ecules form inversion dimers through pairs of O—H...O hydrogen bonds. Weak C—H...O hydrogen bonds are observed between the dimers.

1-(4-{2-[(E)-3-(4-Chloro­phen­yl)-3-oxo­prop-1-en-1-yl]phen­oxy}but­yl)-1H-indole-3-carbaldehyde

In the title compound, C₂₈H₂₄ClNO₃, the dihedral angles between the central benzene ring and the indole ring system and the chlorobenzene ring are 70.81 (5) and 78.62 (5)°, respectively. The mol­ecular structure is stabilized by a weak intra­molecular C—H...O inter­action. In the crystal, pairs of C—H...O hydrogen bonds link the mol­ecules into inversion dimers with an R₂²(14) motif.

2-Ferrocenyl-3-nitro-2H-chromene

In the title compound, [Fe(C₅H₅)(C₁₄H₁₀NO₃)], the cyclo­penta­dienyl rings are in an eclipsed conformation and the pyran ring adopts a half-chair conformation. The mean plane of the pyran ring makes dihedral angles of 79.33 (1) and 80.73 (1)°, respectively, with the substituted and unsubstituted cyclo­penta­dienyl rings. In the crystal, pairs of C—H...O hydrogen bonds link the mol­ecules into inversion dimers with R₂²(16) motifs.

rac-Methyl 3-(2-meth­oxy­phen­yl)-3a,4-di­hydro-3H-chromeno[4,3-c]isoxazole-3a-carboxyl­ate

The title compound, C₁₉H₁₇NO₅, comprising two stereogenic C atoms of the same configuration, crystallizes in a centrosymmetric space group as a racemate. The pyran ring adopts a half-chair conformation, while the isoxazole ring adopts an envelope conformation with the C atom bonded to the meth­oxy­phenyl group as the flap. The dihedral angle between the mean plane of the pyran ring and the adjacent benzene ring is 5.86 (5)°. In the crystal, mol­ecules are linked by a weak C—H...O hydrogen bond, forming a chain along the a axis.

rac-3-(4-Chloro­phen­yl)-3a,4-di­hydro-3H-chromeno[4,3-c]isoxazole-3a-carbo­nitrile

The title compound, C₁₇H₁₁ClN₂O₂, which contains two stereogenic C atoms, crystallizes in a centrosymmetric space group as a racemate. The pyran ring and the isoxazole ring adopt sofa and twisted conformations, respectively. The dihedral angle between the benzene ring and the mean plane through the near coplanar atoms of the pyran ring is 4.17 (5)°. The mol­ecular conformation features a weak C—H...O contact. In the crystal, C—H...O hydrogen bonds link the mol­ecules, forming chains along the a-axis direction.