In the structure of the title compound, C(15)H(14)O(2)S, the benzene ring is nearly coplanar with the thio-phene ring. The hydroxy group substituted at C2 position is in an antiperi-planar conformation with respect to the phenyl ring. The crystal structure exhibits weak intramolecular O-H⋯O hydrogen bonding.

In the title compound, C(9)H(14)O(3), the cyclo-hexenone ring has an envelope conformation; the flap atom (with the hydroxy-methyl groups attached) is displaced by 0.582 (4) Å from the plane of the other five ring atoms. The crystal structure contains an inter-molecular O-H⋯O hydrogen-bonded ring.

In the title compound, C(19)H(16)N(2)O(2), the benzene ring and the naphthyl ring system form a dihedral angle of 8.7 (3)° and an intra-molecular O-H⋯N hydrogen bond generates an S(6) ring. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, forming C(4) chains propagating in [001].

In the title mol-ecule, C(22)H(17)ClN(2)O(5), the nitro-substituted benzene ring makes a dihedral angle of 79.22 (1)° with the benzoyl ring and 53.03 (1)° with the chloro-substituted benzene ring. An intra-molecular C-H⋯O hydrogen bond occurs. The crystal structure features weak C-H⋯Cl and C-H⋯O inter-actions.

In the mol-ecule of the title compound, C(7)H(8)NO(2) (+)·Cl(-)·H(2)O, an intra-molecular N-H⋯O hydrogen bond results in the formation of a non-planar six-membered ring adopting a flattened boat conformation. In the crystal structure, inter-molecular O-H⋯O and N-H⋯Cl hydrogen bonds link the mol-ecules. There is a C=O⋯π contact between the carbonyl unit and the centroid of the benzene ring. Ther...

In the title hydrate, C(23)H(16)N(4)O(2)·H(2)O, the pyrazole ring is approximately planar, with a maximum deviation of 0.023 (1) Å, and makes dihedral angles of 28.63 (6) and 46.44 (7)° with the naphtho-[2,1-b]furan ring system and the benzene ring, respectively, In the crystal, O-H⋯N, O-H⋯O, N-H⋯O, N-H⋯N, C-H⋯O and C-H⋯N hydrogen bonds link the mol-ecules, forming sheets lying parallel to the ...

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In the title compound, C(11)H(10)N(3)O(4)S(+)·C(2)Cl(3)O(2) (-), the benzene ring forms an angle of 85.21 (13)° with the pyridinium ring. The nitro group is nearly coplanar with its attached benzene ring [dihedral angle = 3.68 (12)°]. In the crystal structure, strong N-H⋯O hydrogen bonds link the ion-pairs. The packing is further consolidated by weak C-H⋯O inter-ations.

In the title compound, C(11)H(10)N(3)O(4)S(+)·C(2)F(3)O(2) (-), the benzene ring makes an angle of 87.3 (2)° with the pyridinium ring. The nitro group is essentially coplanar with the benzene ring. The F atoms of the CF(3) group are disordered over two positions with almost equal occupancy [0.531 (12)/0.469 (12)]. The crystal structure is stabilized by N-H⋯O and C-H⋯O hydrogen bonds.