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16 citations found for Xiong, H.
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In the title compound, C11H8N2O2, the packing is consolidated by C—H
N and C—H
O interactions.
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The title compound, C20H17N3O2S2, was synthesized by the reaction of 2-(1,5-diphenyl-1H-pyrazol-3-yloxy)acetic acid and thiazolidine-2-thione. The C-linked benzene ring, N-linked benzene ring and thiazolidine-2-thione ring are twisted 31.33 (2), 62.87 (1) and 82.71 (2)°, respectively, from the plane of the bridging 1H-pyrazole ring. The phenyl rings are oriented at a dihedral angle of 72.16 (2)°.
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The title compound, [PtCl2(C15H20N2S)], was synthesized from the reaction between N-heterocyclic carbene(NHC)-thioether ligand and potassium tetrachloroplatinate. In the crystal, the molecules are linked via C—H
Cl and C—H
π interactions, forming a layer parallel to the ab plane.
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In the title compound, [Cu(C14H8O5)(C12H12N2)(H2O)]n, the CuII ion is pentacoordinated in a square-pyramidal geometry. Two N atoms of the chelating 5,5′-dimethyl-2,2′-bipyridine (dbp) ligand and two O atoms of two different 2,2′-oxydibenzoic (odb) ligands occupy the basal plane while the water O atom completes the square-pyramidal geometry at the apical site. The non-water N2O2 donor atoms are nearly coplanar, with a mean deviation from the least-squares plane of 0.0518 (11) Å and the Cu atom is displaced by 0.1507 (11) Å from this plane towards the apical water O atom. Further coordination via the 2,2′-oxydibenzoate anions forms a one-dimensional coordination polymer extending parallel to [010]. In the crystal structure, O—H
O hydrogen bonds link the molecules into a two-dimensional supramolecular structure.
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The title compound [systematic name: 4-amino-1-(2-deoxy-β-D-erythro-pentofuranosyl)-5-ethynylpyrimidin-2(1H)-one], C11H13N3O4, shows two conformations in the crystalline state. The N-glycosylic bonds of both conformers adopt similar conformations, with χ = −149.2 (1)° for conformer (I-1) and −151.4 (1)° for conformer (I-2), both in the anti range. The sugar residue of (I-1) shows a C2′-endo envelope conformation (2E, S-type), with P = 164.7 (1)° and τm = 36.9 (1)°, while (I-2) shows a major C3′-exo sugar pucker (C3′-exo-C2′-endo, 3T2, S-type), with P = 189.2 (1)° and τm = 33.3 (1)°. Both conformers participate in the formation of a layered three-dimensional crystal structure with a chain-like arrangement of the conformers. The ethynyl groups do not participate in hydrogen bonding, but are arranged in proximal positions.
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The title compound {systematic name: 4-amino-1-(2-deoxy-
-D-erythro-pentofuranosyl)-5-[6-(1-benzyl-1H-1,2,3-triazol-4-yl)hex-1-ynyl]pyrimidin-2(1H)-one}, C24H28N6O4, shows two conformations in the crystalline state, viz. (I-1) and (I-2). The pyrimidine groups and side chains of the two conformers are almost superimposable, while the greatest differences between them are observed for the sugar groups. The N-glycosylic bonds of both conformers adopt similar anti conformations, with
= -168.02 (12)° for conformer (I-1) and
= -159.08 (12)° for conformer (I-2). The sugar residue of (I-1) shows an N-type (C3'-endo) conformation, with P = 33.1 (2)° and
m = 29.5 (1)°, while the conformation of the 2'-deoxyribofuranosyl group of (I-2) is S-type (C3'-exo), with P = 204.5 (2)° and
m = 33.8 (1)°. Both conformers participate in hydrogen-bond formation and exhibit identical patterns resulting in three-dimensional networks. Intermolecular hydrogen bonds are formed with neighbouring molecules of different and identical conformations (N-H
N, N-H
O, O-H
N and O-H
O).
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In the title compound, {[Zn3(C9H3O6)2(C12H12N2)2(H2O)6]·6H2O}n, one ZnII atom, lying on an inversion center, is six-coordinated by two O atoms from two benzene-1,3,5-tricarboxylate (btc) ligands and four water molecules in a distorted octahedral geometry. The other ZnII atom is five-coordinated by two N atoms from a 5,5′-dimethyl-2,2′-bipyridine (dmbpy) ligand, two O atoms from two btc ligands and one water molecule in a distorted trigonal–bipyramidal geometry. The compound features a one-dimensional ladder structure, with windows of ca 10.245 (1) × 15.446 (2) Å. The ladders are linked together by intermolecular O—H
O hydrogen bonds and π–π interactions between the benzene rings and between the pyridine rings [centroid-to-centroid distances 3.858 (2) and 3.911 (3) Å, respectively] to form a three-dimensional supramolecular structure. One of the lattice water molecules is disordered over two positions in a 0.592:0.408 ratio.
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In the title compound, [Ni(C9H4O6)(C12H12N2)(H2O)2]·7H2O, the NiII atom is six-coordinated by two O atoms from a chelating carboxylate group of a 5-carboxybenzene-1,3-dicarboxylate ligand, two O atoms of two water molecules and two N atoms from a 6,6′-dimethyl-2,2′-bipyridine ligand in a distorted octahedral geometry. The compound exhibits a three-dimensional supramolecular structure composed of the complex molecules and lattice water molecules, which are linked together by intermolecular O—H
O hydrogen bonds and partly overlapping π–π interactions between the pyridine and benzene rings [centroid–centroid distances = 3.922 (2) and 3.921 (2) Å]. One of the lattice water molecules is disordered over two positions in an occupancy ratio of 0.521 (6):0.479 (6).
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The title complex, [Sm2(C3H5O2)6(C12H8N2)2], is a dinuclear centrosymmetric molecule, in which two crystallographically equivalent Sm atoms, separated by 3.9502 (2) Å, are bridged by four propanoate anions. Each Sm atom is coordinated by two N atoms from one chelating phenanthroline ligand and seven carboxylate O atoms from five propanoate anions, to form a distorted tricapped trigonal prism.
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In the title heteronuclear NiII–HoIII complex (systematic name: {μ-6,6′-diethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato-1κ4O1,O1′,O6,O6′:2κ4O1,N,N′,O1′}trinitrato-1κ6O,O′-holmium(III)nickel(II)), [HoNi(C20H22N2O4)(NO3)3], with the hexadentate Schiff base compartmental ligand N,N′-bis(3-ethoxysalicylidene)ethylenediamine (H2L), the Ho and Ni atoms are doubly bridged by two phenolate O atoms of the Schiff base ligand. The coordination of Ni is square-planar with the donor centers of two imine N atoms and two phenolate O atoms. The holmium(III) center has a tenfold coordination environment of O atoms, involving the phenolate O atoms, two ethoxy O atoms and two O atoms each from the three nitrates. Weak C—H
O and O
Ni [3.383 (4) Å] interactions generate a two-dimensional zigzag sheet.
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In the crystal, the compound forms offset slanted stacks of alternating inversion-related molecules along the a-axis direction. Intermolecular O—H
O hydrogen bonds link the molecules into double strands parallel to the [101] direction.
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In the title compound (common name: iodiconazole), C19H19F2IN4O, there is an intramolecular O—H
N hydrogen bond and molecules are linked by weak interactions only, namely C—H
N, C—H
O and C—H
F hydrogen bonds, and π-electron ring–π-electron ring interactions between the triazole rings with centroid–centroid distances of 3.725 (3) Å.
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The title compound [systematic name: 5'a-hydroxy-1',3,6,8'-tetrakis(methylene)-3a,4,5,5',5'a,6,6',6a,7,7',7'a,8',9a,9b,10'a,10'b-hexadecahydrospiro[azuleno[4,5-b]furan-9(2H),3'-[3H]benz[1,8]azuleno[4,5-b]furan]-2,2',8,9'(1'H,3H,4'H)-tetrone acetone 0.92-solvate], C30H30O7·0.92C3H6O, is a dimeric sequiterpene formed by a cyclohexane system connecting two monomeric sesquiterpene lactone units of dehydrozaluzanin C. It was isolated from Ainsliaea henryi.
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The title compound (systematic name: 5,7-dihydroxy-3,6,8-trimethoxy-4H-chromen-4-one), C18H16O7, is a flavone that was isolated from Ainsliaea henryi. There are two molecules in the asymmetric unit, one of which has a disordered methoxy group [occupancy ratio 0.681 (9):0.319 (9)]. Both molecules have an intramolecular O—H
O hydrogen bond. In the crystal, molecules are linked into O—H
O hydrogen-bonded chains parallel to [110].
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The title compound, C31H50O, a tetracyclic triterpene, was isolated from Ainsliaea henryi. The molecule contains a three-membered ring, a five-membered ring, which exhibits an envelope conformation, and three six-membered rings, which adopt chair conformations.
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The title compound (systematic name: 3-hydroxy-1,2-dimethoxy-9H-xanthen-9-one), C15H12O5, was isolated from Polygala arillata. The tricyclic unit is essentially planar (r.m.s. deviation = 0.039 Å). In the crystal, the molecules form stacks along the a axis. Intermolecular O—H
O hydrogen bonds link the molecules into chains parallel to [010].
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