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Crystal structure of 3-(hy-droxy-meth-yl)chromone.

ABSTRACT: In the title compound, C10H8O3 (systematic name 3-hy-droxy-methyl-4H-chromen-4-one), the fused-ring system is slightly puckered [dihedral angle between the rings = 3.84 (11)°]. The hy-droxy O atom deviates from the heterocyclic ring by 1.422 (1) Å. In the crystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds generate R 2 (2)(12) loops. The dimers are linked by aromatic π-π stacking [shortest centroid-centroid distance = 3.580 (3) Å], and C-H⋯O hydrogen bonds, generating a three-dimensional network.

SUBMITTER: Ishikawa Y

PROVIDER: S-EPMC4518918 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Crystal structure of [4-(chloro-meth-yl)phen-yl](4-hy-droxy-piperidin-1-yl)methanone.

Project description:The title compound, C13H16ClNO2, crystallized with two independent mol-ecules in the asymmetric unit (A and B). The piperidinol ring in mol-ecule B is disordered over two positions with a site occupancy ratio of 0.667 (5):0.333 (5). In both mol-ecules these rings have a chair conformation, including the minor component in mol-ecule B. Their mean planes are inclined to the benzene ring by 45.57 (13)° in mol-ecule A, and by 50.5 (4)° for the major component of the piperidine ring in mol-ecule B. In the crystal, the individual mol-ecules are linked by O-H⋯O hydrogen bonds, forming chains of A and B mol-ecules along the [100] direction. The chains are inter-linked by C-H⋯O hydrogen bonds, forming ribbons.

| S-EPMC4647401 | biostudies-literature

Crystal structure of N-[(2-hy-droxy-naphthalen-1-yl)(4-methyl-phen-yl)meth-yl]acetamide.

Project description:In the title mol-ecule, C20H19NO2, the naphthalene ring system subtends a dihedral angle of 82.50?(7)° with the benzene ring and an intra-molecular N-H?O hydrogen bond closes an S(6) ring. In the crystal, mol-ecules are linked by O-H?O hydrogen bonds, which generate C(8) chains propagating in the [010] direction. The crystal structure also features weak ?-? inter-actions [centroid-centroid separation = 3.7246?(10)?Å].

| S-EPMC4438828 | biostudies-literature

Crystal structure of 2-{(E)-[(2-hy-droxy-phen-yl)iminium-yl]meth-yl}-4-methyl-phenolate.

Project description:The title compound, C14H13NO2, exists as a zwitterion in the solid state, with the H atom of the phenol group transferred to the imine N atom. The dihedral angle between the planes of the benzene rings is 10.13?(9)°. Intra-molecular N-H?O hydrogen bond generate S(6) and S(5) loops. In the crystal, mol-ecules are connected by O-H?O hydrogen bonds, generating C(9) chains propagating in the [010] direction.

| S-EPMC4420074 | biostudies-literature

Crystal structure of (4-hy-droxy-piperidin-1-yl)[4-(tri-fluoro-meth-yl)phen-yl]methanone.

Project description:The title compound, C13H14NO2F3, crystallises with two mol-ecules, A and B, in the asymmetric unit, with similar conformations. The dihedral angles between the piperidine and phenyl rings are 83.76 (2) and 75.23 (2)° in mol-ecules A and B, respectively. The bond-angle sums around the N atoms [359.1 and 359.7° for mol-ecules A and B, respectively] indicate sp (2) hybridization for these atoms. In the crystal, O-H⋯O hydrogen bonds link the mol-ecules into separate [100] chains of A and B mol-ecules. The chains are cross-linked by C-H⋯O inter-actions, generating alternating (001) sheets of A and B mol-ecules.

| S-EPMC4647357 | biostudies-literature

Crystal structure of {[2-hy-droxy-2-(3-meth-oxy-phen-yl)cyclo-hex-yl]meth-yl}di-methyl-ammonium benzoate.

Project description:The title compound, C16H26NO2 (+)·C7H5O2 (-), is a benzoate salt of the painkiller Tramadol. The six-membered cyclo-hexane ring of the cation adopts a slightly distorted chair conformation and carries OH and 3-meth-oxy-phenyl substituents at the 2-position and a protonated methyl-aza-niumylmethyl group at the 3-position. In addition, a weak intra-molecular C-H?O hydrogen bond is observed in the cation. In the crystal, weak O-H?O, N-H?O and C-H?O hydrogen bonds link the components into chains along [010]. A C-H?? contact is also observed.

| S-EPMC4645060 | biostudies-literature

Crystal structure of 3-[({2-[bis-(2-hy-droxy-benz-yl)amino]-eth-yl}(2-hy-droxy-benz-yl)amino)-meth-yl]-2-hydroxy-5-methyl-benzaldehyde.

Project description:The non-symmetric title mol-ecule, C32H34N2O5, is based on a tetra-substituted ethyl-enedi-amine backbone. The mol-ecular structure consists of three hy-droxy-benzyl groups and one 2-hy-droxy-5-methyl-benzaldehyde group bonded to the N atoms of the di-amine unit. The ethyl-enedi-amine skeleton shows a regular extended conformation, while the spatial orientation of the phenol arms is governed by hydrogen bonds. In the 2-hy-droxy-5-methyl-benzaldehyde group, an intra-molecular S(6) O-H?O hydrogen bond is observed between the alcohol and aldehyde functions, and the neighbouring phenol arm participates in an intra-molecular S(6) O-H?N hydrogen bond. The third phenol group is involved in a bifurcated intra-molecular hydrogen bond with graph-set notation S(6) for O-H?N and O-H?O intra-molecular hydrogen bonds between neighbouring amine and phenol arms, respectively. Finally, the fourth phenol group acts as an acceptor in a bifurcated intra-molecular hydrogen bond and also acts as donor in an inter-molecular hydrogen bond, which connects inversion-related mol-ecules into dimers with R 4 (4)(8) ring motifs.

| S-EPMC4257411 | biostudies-literature

Crystal structure of 2-(di-phenyl-phos-phanyl)phenyl 4-(hy-droxy-meth-yl)benzoate.

Project description:The title compound, C26H21O3P, was obtained as by-product due to the hydrolysis of the desired tosyl-ated compound. The dihedral angles between the three aromatic rings attached to the P atom lie in the range 78.1?(1)-87.6?(1)°. The hy-droxy-methyl group is disordered between two conformations in a 0.719?(9):0.281?(9) ratio. The hy-droxy H atom is not involved in inter-molecular inter-actions, while the hy-droxy O atom serves as a donor for weak C-H?O hydrogen bonds, which link the mol-ecules into chains propagating in [0-11].

| S-EPMC4257391 | biostudies-literature

Crystal structure of <i>rac</i>-4-[2-(<i>tert</i>-butyl-aza-nium-yl)-1-hy-droxy-eth-yl]-2-(hy-droxy-meth-yl)phenol benzoate.

Project description:The title salt, C13H22NO3+·C7H5O2-, comprises one salbutamol cation {sys-tematic name: 4-[2-(tert-butyl-aza-nium-yl)-1-hy-droxy-eth-yl]-2-(hy-droxy-meth-yl)phenol} and a benzoate anion. The cation shows disorder of the hy-droxy group [occupancy ratio 0.738?(3):0.262?(3)] at the stereogenic C atom. The non-planar benzoate anion [the dihedral angle between the benzene ring and the carboxyl group is 11.30?(8)°] is linked to the salbutamol cation by a medium-strength O-H?O hydrogen bond. Other inter-molecular O-H?O and N-H?O hydrogen bonds of weaker nature give rise to [001] chains.

| S-EPMC5588574 | biostudies-literature

Crystal structure of bis-(2-{[1,1-bis-(hy-droxy-meth-yl)-2-oxidoeth-yl]imino-meth-yl}-6-meth-oxy-phenolato)manganese(IV) 0.39-hydrate.

Project description:The title compound, [Mn(C12H15NO5)2]·0.39H2O, is a 0.39 hydrate of the isostructural complex bis-(2-{[1,1-bis-(hy-droxy-meth-yl)-2-oxidoeth-yl]imino-meth-yl}-6-meth-oxy-phenolato)manganese(IV) that has previously been reported by Back, Oliveira, Canabarro & Iglesias [Z. Anorg. Allg. Chem. (2015), 641, 941-947], based on room-temperature data. The current structure that was determined at 100 K reveals a lengthening of the c cell parameter compared with the published one due to the incorporation of the partial occupancy water mol-ecule. The title compound crystallizes in the tetra-gonal chiral space group P41212; the neutral [Mn(IV)(C12H15NO5)2] mol-ecule is situated on a crystallographic C 2 axis. The overall geometry about the central manganese ion is octa-hedral with an N2O4 core; each ligand acts as a meridional ONO donor. The coordination environment of Mn(IV) at 100 K displays a difference in one of the two Mn-O bond lengths, compared with the room-temperature structure. In the crystal, the neutral mol-ecules are stacked in a helical fashion along the c-axis direction.

| S-EPMC4645066 | biostudies-literature

Crystal structure of 4-[(2-hy-droxy-3-meth-oxy-benz-yl)amino]-benzoic acid hemihydrate.

Project description:In the crystal of the title vanilline derivative, 2C15H15NO4·H2O, the secondary amine mol-ecule is accompanied by half equivalent of water. The mol-ecule is non-planar, with torsion angle Car-yl-CH2-NH-Car-yl of -83.9?(2)°. In the crystal, the system of O-H?O hydrogen bonds, including bridging water mol-ecules residing on crystallographic twofold axes, results in a two-dimensional layered structure. Within the layers, there are also weak N-H?? inter-actions involving the vanilline benzene ring.

| S-EPMC6362667 | biostudies-literature

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