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In the title compound, C23H27NO4, a modified synthetic D-homo steroid, the cyclo­hexene ring adjacent to the aromatic ring adopts a half-chair conformation, while the cyclo­hexane ring has an ideal chair conformation and the heterocyclic ring has a sofa conformation. The plane of the allyl substituent lies almost perpendicular to the least-squares plane of the heterocyclic ring. The crystal structure contains a series of weak C—H...O intermolecular interactions.

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The title compound, C21H21N2O+·Br·0.5H2O, crystallizes in a monoclinic unit cell with two cations, two anions and one water mol­ecule in the asymmetric unit. The conformations of the two independent cations are different. The crystal packing is stabilized by O—H...Br and C—H...Br interactions and weak intermolecular C—H...O hydrogen bonds.

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The title compound, C14H18N2O3, is a potential anti-amnesic agent. The pyrrolidine ring is disordered and both major and minor components adopt an envelope conformation. In the solid state, symmetry-related mol­ecules are linked by inter­molecular N—H...O hydrogen bonds, forming chains with a C(10) graph-set motif. Inter­molecular C—H...O inter­actions are also observed.

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In the title compound, C22H29NO3, a modified synthetic D-homo steroid, the cyclo­hexene ring adjacent to the aromatic ring adopts a half-chair conformation, while the cyclo­hexane ring has an ideal chair conformation. The heterocyclic ring adopts a 14β-sofa conformation. The butyl substituent is nearly planar, this plane lying almost perpendicular to the least-squares plane of the heterocyclic ring. Inter­molecular O—H...O hydrogen bonds link the mol­ecules into extended chains and the compound also exhibits some weak inter­molecular C—H...O inter­actions.

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In the title compound, C23H31NO3, a modified synthetic D-homo steroid derivative, the cyclo­hexene ring adjacent to the aromatic ring adopts a half-chair conformation, while the cyclo­hexane ring has an ideal chair conformation. The heterocyclic ring adopts a 14α-sofa conformation. The butyl substituent is nearly planar, this plane lying almost perpendicular to the least-squares plane of the heterocyclic ring. The structure displays some weak inter­molecular C—H...O inter­actions.

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In the title mol­ecule, C21H19N5O9, the dihedral angle between the mean planes of the triazole and pyrazole rings is 82.4 (1)°. In the solid state, symmetry-related mol­ecules are linked by weak inter­molecular C—H...O and C—H...N hydrogen bonds, having a graph-set motif of R22(10), to form chains running parallel to the a axis.

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In the title compound, C9H8N2O2S, the H atom of the thiol group has been transferred to the neighbouring N atom of the oxadiazole ring. Inter­molecular N—H...N hydrogen bonds exist between adjacent mol­ecules.

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In the title compound, C19H19Cl2N3O2, the piperidine ring adopts a distorted boat conformation. In the solid state, the mol­ecules exist as O—H...N-hydrogen-bonded centrosymmetric dimers.

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In the title compound, C19H19Cl2N3O2, the piperidine ring adopts a distorted boat conformation. In the solid state, the mol­ecules exist as O—H...N hydrogen-bonded centrosymmetric dimers.

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In the title compound, C18H19N3O2·H2O, the piperidine ring adopts a distorted boat conformation. In the solid state, the mol­ecules are linked by inter­molecular O—H...O and O—H...N hydrogen bonds involving water mol­ecules.
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