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organic compounds
In the title compound, C11H16N2O2, inversion-related molecules form an O—H
O and N—HO hydrogen-bonded dimer. The hydrogen bonds generate rings of motifs 
(6) and 
(10). Weak π–π interactions between the dimers stabilize the crystal packing.
O and N—HO hydrogen-bonded dimer. The hydrogen bonds generate rings of motifs 
(6) and 
(10). Weak π–π interactions between the dimers stabilize the crystal packing.organic compounds
The 9,10-anthraquinone ring system of the title compound, C25H26O5, is essentially planar. The O-geranyl substituent is at the meta position with respect to the hydroxyl group. O—HO intramolecular hydrogen bonds are observed in the molecular structure. The molecules form centrosymmetric hydrogen-bonded dimers via intermolecular C—HO hydrogen bonds which generate rings of motif R22(10). The crystal structure is further stabilized by weak π–π interactions.
O intramolecular hydrogen bonds are observed in the molecular structure. The molecules form centrosymmetric hydrogen-bonded dimers via intermolecular C—HO hydrogen bonds which generate rings of motif R22(10). The crystal structure is further stabilized by weak π–π interactions. organic compounds
The title compound, C20H21O7, also known as purpuriol, was isolated for the first time from natural product sources. The cyclohexene ring adopts a half-chair conformation with an axially attached methyl benzoate and equatorially attached benzoyloxy substituents. The methyl benzoate and benzoyloxy groups are essentially planar. The dihedral angle between these groups is 9.2 (2)°. O—HO intermolecular hydrogen bonds link the molecules into chains along the a axis and the chains are interlinked by C—HO hydrogen bonds and C—Hπ interactions.
O intermolecular hydrogen bonds link the molecules into chains along the a axis and the chains are interlinked by C—HO hydrogen bonds and C—Hπ interactions. metal-organic compounds
In the crystal structure of the title compound, [Zn(NCS)2(C6H8N2)2], the Zn atom and both isothiocyanate groups lie on a crystallographic mirror plane. The Zn atom is in a distorted tetrahedral geometry. The crystal structure is stabilized by N—HS hydrogen bonds and weak π–π interactions.
S hydrogen bonds and weak π–π interactions. metal-organic compounds
In the centrosymmetric title compound, [Cd(NCS)2(C6H8N2)4], the CdII atom is in a distorted octahedral environment. The crystal structure is stabilized by N—HS hydrogen bonds and weak N—Hπ and C—Hπ interactions.
S hydrogen bonds and weak N—Hπ and C—Hπ interactions.organic compounds
The title compound, C12H16N4OS, is zwitterionic and exists in the EZ configuration of thiosemicarbazones. The thiocarbonyl S atom and coordinating pyridyl N atom are aligned cis to each other, avoiding the possibility of a structural reorientation upon coordination. Two crystallographically independent molecules, A and B, are observed in the asymmetric unit, with the morpholyl ring adopting a chair conformation in both molecules. N—HN and N—HS intramolecular hydrogen bonds are observed in the molecular structure, generating four rings of motif R12(5). There is zigzag packing in the unit cell, involving both intra- and intermolecular hydrogen-bonding interactions.
N and N—HS intramolecular hydrogen bonds are observed in the molecular structure, generating four rings of motif R12(5). There is zigzag packing in the unit cell, involving both intra- and intermolecular hydrogen-bonding interactions.organic compounds
In the title compound, C15H16NO2+·C6H4BrSO3−, the cation is almost planar. The benzene ring of the anion makes dihedral angles of 82.00 (8) and 74.96 (8)° with the mean planes through the benzene ring of the cation and the pyridinium ring, respectively. In the solid state, the cations and anions are packed as alternate layers parallel to the ac plane. These layers are interconnected through O—HO, C—HO and C—Hπ interactions to form a three-dimensional network.
O, C—HO and C—Hπ interactions to form a three-dimensional network. organic compounds
The title compound, C30H50O3, a lupane triterpene, was isolated from the leaves of Ceriops decandra (Griff.) Ding Hou. There are two crystallographically independent molecules in the asymmetric unit. In both molecules, the cyclopentane ring adopts an envelope conformation. In the crystal structure, molecules are interconnected into a two-dimensional network by intermolecular O—HO hydrogen bonds.
O hydrogen bonds.organic compounds
The title compound, C15H16NO2+·C6H4ClO3S−, is isomorphous with the 4-bromobenzenesulfonate derivative. The cation is almost planar and the benzene ring of the anion makes dihedral angles of 82.79 (1) and 76.39 (1)° with the mean planes through the benzene ring of the cation and the pyridinium ring, respectively. The cations and anions are packed as alternate layers parallel to the ac plane. These layers are interconnected through O—HO, C—HO and C—Hπ interactions to form a three-dimensional network.
O, C—HO and C—Hπ interactions to form a three-dimensional network.organic compounds
The title compound, C23H22O6·CH3OH, has an essentially planar xanthone nucleus fused to a chromene ring which adopts a sofa conformation. The 3-methylbut-2-enyl substituent is axially attached to the xanthone ring system, with a (+)-anticlinal conformation. The crystal structure is stabilized by O—HO and C—HO intramolecular and intermolecular interactions.
O and C—HO intramolecular and intermolecular interactions.organic compounds
The title compound, (6,7-dimethoxy-3,4-dihydro-2H-chromen-4-yl)(5-methoxy-2,2-dimethyl-2H-chromen-6-yl)methanone, C24H25O6, is a modified rotenoid. In the crystal structure, the chromene ring is disordered, together with its attached methyl and methoxy groups. The molecules are packed as layers parallel to the ac plane. These layers are interconnected through C—HO interactions to form a three-dimensional network.
O interactions to form a three-dimensional network.metal-organic compounds
In the title compound, [Zn(CH5N3S)2(H2O)2](C4H3O4)2·2H2O, the ZnII ion lies on a centre of symmetry and is coordinated by two pairs of N and S atoms from two symmetry-related thiosemicarbazide ligands and two O atoms from two water molecules in a distorted octahedral geometry. In the crystal structure, the components are effectively linked together by electrostatic interactions and hydrogen bonds of the O—HO, N—HO and N—HS types into a three-dimensional network.
O, N—HO and N—HS types into a three-dimensional network.organic compounds
The title compound, C40H58O4, a lupane triterpene, was isolated from the hypocotyls of Ceriops tagal (Perr.) C. B. Robinson. There are two crystallographically independent molecules in the asymmetric unit. In both molecules, the cyclopentane ring adopts an envelope conformation. The molecular structure is stabilized by O—HO and C—HO hydrogen bonds. C—HO intermolecular hydrogen bonds link the molecules into chains along the a axis.
O and C—HO hydrogen bonds. C—HO intermolecular hydrogen bonds link the molecules into chains along the a axis.organic compounds
The title compound, C17H14O5, a flavone, was isolated from the rhizomes of Kaempferia parviflora. There are two crystallographically independent molecules in the asymmetric unit. The molecular structure is stabilized by intramolecular O—HO and C—HO hydrogen bonds. C—HO intermolecular hydrogen bonds and π–π stacking interactions link the molecules into a network.
O and C—HO hydrogen bonds. C—HO intermolecular hydrogen bonds and π–π stacking interactions link the molecules into a network.organic compounds
The title compound, C17H18O5, was isolated from the leaves of Rauwenhoffia siamensis Scheff. There are two crystallographically independent molecules in the asymmetric unit. The dihedral angle between the two benzene rings is 80.81 (7)° in one molecule and 65.89 (7)° in the other. The symmetry-related molecules are linked via O—HO intermolecular hydrogen bonds to form chains along [201].
O intermolecular hydrogen bonds to form chains along [201].organic compounds
In the title compound, C19H18NO2+. C7H7SO3−, the cation is almost planar and the benzene ring of the anion makes dihedral angles of 59.17 (9) and 60.59 (10)° with the mean planes through the quinolinium and benzene ring of the cation, respectively. The cations and anions are packed as alternate layers along the b axis. These layers are interconnected through O—HO and C—HO interactions to form a three-dimensional network. The structure is stabilized by these interactions and C—Hπ interactions.
O and C—HO interactions to form a three-dimensional network. The structure is stabilized by these interactions and C—Hπ interactions.organic compounds
The title compound, C24H26O6, is a caged-polyprenylated xanthone which has been isolated for the first time from the roots of C. cochinchinese. The cyclohexane ring adopts a standard boat conformation, the cyclohexene rings are in twisted boat and twist-boat conformations, and the tetrahydrofuran ring has an envelope conformation. The structure is stabilized by intramolecular C—HO and O—HO hydrogen bonds. C—HO intermolecular hydrogen bonds and C—Hπ stacking interactions link the molecules into molecular sheets parallel to the bc plane.
O and O—HO hydrogen bonds. C—HO intermolecular hydrogen bonds and C—Hπ stacking interactions link the molecules into molecular sheets parallel to the bc plane.organic compounds
The title compound, C18H16O5, a flavone, was isolated from the rhizomes of Kaempferia parviflora. The phenyl substituent is twisted away from the plane of the benzopyran-4-one ring system by 31.05 (4)°. The crystal structure is stabilized by π–π stacking interactions between the benzopyran-4-one ring system of inversion-related molecules stacked along the a axis and C—HO interactions between the screw-related molecules.
O interactions between the screw-related molecules.organic compounds
The non-H atoms of the title compound, C15H10O4, which was isolated from the roots of Prismatomeris malayana Ridl., are coplanar. Intramolecular O—HO and C—HO hydrogen bonds are observed in the molecular structure. The molecules form centrosymmetric hydrogen-bonded dimers via intermolecular O—HO hydrogen bonds. The crystal structure is further stabilized by weak π–π interactions.
O and C—HO hydrogen bonds are observed in the molecular structure. The molecules form centrosymmetric hydrogen-bonded dimers via intermolecular O—HO hydrogen bonds. The crystal structure is further stabilized by weak π–π interactions.organic compounds
The title compound, C17H14O5, a flavone, was isolated from the rhizomes of Kaempferia parviflora. The benzopyran-4-one ring system and the methoxyphenyl substituent are approximately coplanar. The molecules are linked via intermolecular C—HO hydrogen bonds to form chains.
O hydrogen bonds to form chains.organic compounds
The title compound, C17H14O4·CHCl3, was isolated from the rhizomes of Kaempferia parviflora. The benzopyran-4-one ring system and the phenyl substituent are approximately coplanar. The crystal structure is stabilized by π–π stacking interactions between the benzopyran-4-one ring system of inversion-related molecules stacked along the c axis, and C—HO and C—Hπ interactions.
O and C—Hπ interactions.organic compounds
The title compound, C17H14O4, a homoisoflavanoid, was isolated from the twigs and stems of Caesalpinia digyna Rottler. The pyran ring adopts an envelope conformation. The symmetry-related molecules are linked via O—HO and C—HO intermolecular hydrogen bonds to form a molecular network.
O and C—HO intermolecular hydrogen bonds to form a molecular network.organic compounds
The title compound {alternative name: 1,3-bis(di-2-pyridylmethylene)amino]urea}, C23H18N8O, adopts an EE configuration about the hydrazine bonds and exists in the ketone form. Intramolecular N—HN hydrogen bonds are observed. Molecules translated by one unit cell along the a-axis direction are linked by C—HO hydrogen-bonding interactions, forming a chain. In addition, C—Hπ and π–π interactions are observed.
N hydrogen bonds are observed. Molecules translated by one unit cell along the a-axis direction are linked by C—HO hydrogen-bonding interactions, forming a chain. In addition, C—Hπ and π–π interactions are observed.organic compounds
The title compound, C24H26O6·CHCl3, which we named prunifloxanthone A, was isolated for the first time from the roots of Cratoxylum formosum ssp. pruniflorum and has never been isolated from any other natural resources as yet. The xanthone ring systems of the molecules are stacked along the a axis, with significant π–π interactions. In addition, O—HO hydrogen bonds link glide-related molecules into a chain along [201].
O hydrogen bonds link glide-related molecules into a chain along [201].
