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In the title compound, C20H23NO, the cyclo­hepta­none ring adopts a twist-chair conformation, with the amino­methyl substituent in an equatorial position. The relative configuration of the two stereocenters is R,R. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds into chains along [100].

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The title compound, C19H14F3NO2, crystallizes in the keto–amine tautomeric form, with a strong intra­molecular N—H...O hydrogen bond. The mol­ecule is almost planar; the dihedral angle between the naphthalene ring system and the benzene ring is 4.60 (7)°. In the crystal, mol­ecules are linked into chains along the c axis by C—H...O hydrogen bonds. The F atoms of the trifluoro­methyl group are disordered over two positions with refined site occupancies of 0.668 (9) and 0.332 (9).

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In the title compound, C18H15N5O2S, a weak intra­molecular C—H...S hydrogen bond results in a small dihedral angle of 3.71 (9)° between the methyl­phenyl and triazole rings, which, in turn, form dihedral angles of 80.09 (8) and 77.32 (8)°, respectively, with the benzoxazolone mean plane. In the crystal, N—H...O hydrogen bonds link mol­ecules into chains along [001], and weak C—H...N hydrogen bonds and π–π inter­actions between the five- and six-membered rings [centroid–centroid distances = 3.5074 (11) and 3.616 (1) Å] consolidate the crystal packing.

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The title compound, C18H11BrF3NO2, crystallizes in the phenol–imine tautomeric form, with a strong intra­molecular O—H...N hydrogen bond. The dihedral angle between the naphthalene ring system and the benzene ring is 28.54 (10)°.

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In the title compound, C19H12Cl2N2O4, the imine bond length of 1.257 (6) Å is typical of a double bond. The dihedral angle between the para-nitro benzene ring and the central benzene ring is 12.06 (3)° and that between the central benzene and the para-chloro benzene ring is 73.81 (2)°. An intra­molecular O—H...N hydrogen bond generates an S(6) ring motif. In the crystal, mol­ecules are linked together by two pairs of C—H...O interactions (to the same O atom acceptor), forming inversion dimers. A short Cl...Cl contact [3.232 (4) Å] is observed.

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In the title compound, C16H18ClN3O, the cyclo­hexane ring adopts a distorted chair conformation. In the crystal, pairs of mol­ecules are linked by N—H...O hydrogen bonds into inversion dimers, forming R22(10) ring motifs. These dimers are connected through C—H...N hydrogen bonds into chains along the a axis, forming layers parallel to (101).

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In the title compound, C24H26FN3O, the cyclo­hexane ring adopts a chair conformation; the propyl substituent is in an equatorial orientation and the bond-angle sum at the C atom bonded to the carbohydrazide N atom is 360.0°. The dihedral angle between the 1H-indole ring system and the phenyl ring is 82.77 (13)°. A weak intra­molecular C—H...π contact occurs. In the crystal, pairs of mol­ecules related by a crystallographic twofold axis are linked by bifurcated N—H...(O,N) hydrogen bonds; a C—H...O inter­action occurs between the same pair. The dimers are linked by C—H...F and C—H...π inter­actions, generating a three-dimensional network.

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The title compound, C22H22FN3O, crystallized with two independent mol­ecules (A and B) in the asymmetric unit; these are linked by a pair of N—H...O hydrogen bonds, forming a pseudo-centrosymmetric dimer with an R22(10) motif. In addition, a number of C—H...π inter­actions are also observed. The 1H-indole ring systems in mol­ecules A and B are essentially planar [maximum deviations of 0.019 (2) and 0.014 (2) Å, respectively] and make dihedral angles of 77.64 (10) and 69.50 (9)°, respectively, with thephenyl rings.

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In the title compound, C24H24FN3O2S, the 1,3-thia­zolidine ring adopts an envelope conformation with the S atom as the flap, while the cyclo­hexane ring is in a chair conformation. In the crystal, mol­ecules are linked by N—H...O and C—H...F hydrogen bonds, forming a three-dimensional network. The unit cell contains six voids of 57 Å3, but the residual electron density (highest peak = 0.23 e Å−3 and deepest hole = −0.19 e Å−3) in the difference Fourier map suggests no solvent mol­ecule occupies this void.

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The title compound, C23H24FN3O, crystallizes with two independent mol­ecules (I and II) in the asymmetric unit. These pairs of mol­ecules are linked to each other as N—H...O dimers with an R22(10) motif. Furthermore, the crystal structure also exhibits C—H...π inter­actions. The atoms of the ethyl group in mol­ecule I are disordered over two sites with an occupancy ratio of 0.817 (6):0.183 (6).

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In the title compound, C14H13ClN2O5S, the chlorine-substituted tetrahydrofuran ring adopts a twist conformation and the other tetra­hydro­furan ring an envelope conformation with the O atom as the flap. The pyrrolidine ring adopts a twist conformation. In the crystal, C—H...O hydrogen bonds link the mol­ecules into zigzag chains running along the b-axis direction.

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The title compound, C16H23N3O3, contains two morpholine rings, each of which adopts a chair conformation. The mol­ecular conformation is stabilized by an intra­molecular O—H...N hydrogen bond, leading to a S(6) ring. In the crystal, mol­ecules are linked into zigzag chains along the c-axis direction by C—H...O and C—H...π inter­actions.

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In the title compound, C20H18N4O3, the dihedral angles between the central benzene ring and the 1H-1,2,3-triazole ring and the fused benzene ring are 65.34 (19) and 3.64 (18)°, respectively. The dioxole ring adopts a shallow envelope conformation, with the methyl­ene C atom displaced by 0.156 (5) Å from the other four atoms (r.m.s. deviation = 0.007Å). In the crystal, the mol­ecules are linked by C—H...O and C—H...N hydrogen bonds, generating a three-dimensional network.

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In the title compound, C15H15ClN2O5S, the tetra­hydro­furan ring adopts an envelope conformation with the O atom as the flap. The pyrrolidine ring adopts an envelope conformation with the chlorine-substituted C atom as the flap. In the crystal, two types of C—H...O hydrogen bonds generate R22(20) and R44(26) rings, with adjacent rings running parallel to ac plane. Further C—H...O hydrogen bonds form a C(6) chain, linking the mol­ecules in the b-axis direction.
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