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(E)-3-[(3-Eth-oxy-2-hy-droxy-benzyl-idene)amino]-benzoic acid.

ABSTRACT: In the title compound, C(16)H(15)NO(4), a potential bidentate N,O-donor Schiff base ligand, the benzene rings are inclined to one another by 4.24 (12)°. The mol-ecule has an E conformation about the C=N bond. An intra-molecular O-H⋯N hydrogen bond makes an S(6) ring motif. In the crystal, pairs of O-H⋯O hydrogen bonds link the mol-ecules, forming inversion dimers with R(2) (2)(8) ring motifs. These dimers are further connected by C-H⋯O inter-actions, forming a sheet in (104). There is also a C-H⋯π inter-action present involving neighbouring mol-ecules.

SUBMITTER: Kargar H

PROVIDER: S-EPMC3343997 | biostudies-literature |

REPOSITORIES: biostudies-literature

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(E)-3-[(2-Hy-droxy-3-meth-oxy-benzyl-idene)amino]-benzoic acid.

Project description:In the title compound, C(15)H(13)NO(4), the dihedral angle between the substituted benzene rings is 9.9?(8)°. Part of the mol-ecule (the salicylaldimine segment) is disordered over two sets of sites, with a refined site-occupancy ratio of 0.550?(14):0.450?(14). Intra-molecular O-H?N hydrogen bonds form S(6) ring motifs. In the crystal, pairs of O-H?O hydrogen bonds link mol-ecules into centrosymmetric dimers with R(2) (2)(8) ring motifs. The crystal packing also features C-H?? inter-actions.

| S-EPMC3344025 | biostudies-literature

(E)-4-[(4-Diethyl-amino-2-hy-droxy-benzyl-idene)amino]-benzoic acid.

Project description:In the title compound, C(18)H(20)N(2)O(3), a potential bidentate N,O-donor Schiff base ligand, the benzene rings are inclined at an angle of 12.25 (19)°. The mol-ecule has an E conformation about the C=N bond. One of the ethyl groups is disordered over two positions, with a refined site-occupancy ratio of 0.55 (1):0.45 (1). An intra-molecular O-H⋯N hydrogen bond makes an S(6) ring motif. In the crystal, pairs of O-H⋯O hydrogen bonds link mol-ecules, forming inversion dimers with R(2) (2)(8) ring motifs.

| S-EPMC3343998 | biostudies-literature

5-[(E)-(2,6-Dichloro-benzyl-idene)amino]-2-hy-droxy-benzoic acid.

Project description:There are two geometrically different mol-ecules in the asymmetric unit of the title compound, C(14)H(9)Cl(2)NO(3). The 5-amino-2-hy-droxy-benzoic acid units [r.m.s. deviations of 0.0323 and 0.0414?Å] and 2,6-dichloro-benzaldehyde groups [r.m.s. deviations of 0.0285 and 0.0226?Å] are roughly planar and oriented at dihedral angles of 11.69?(13) and 83.12?(6)° in the two mol-ecules. An intra-molecular O-H?O hydrogen bond completes an S(6) ring motif in each mol-ecule. The two mol-ecules form dimers with each other through inter-molecular O-H?N and C-H?O hydrogen bonds, completing an R(2) (2)(8) ring motif. The dimers are inter-linked via inter-molecular O-H?N and C-H?O hydrogen bonds, forming polymeric sheets.

| S-EPMC3009312 | biostudies-literature

5-[(E)-(2-Fluoro-benzyl-idene)amino]-2-hy-droxy-benzoic acid.

Project description:In the title compound, C(14)H(10)FNO(3), the dihedral angle between the two benzene rings is 32.66 (14)°. An S(6) ring motif is formed due to an intra-molecular O-H⋯O hydrogen bond between the hy-droxy and carbonyl groups. In the crystal, mol-ecules are consolidated into dimers with R(2) (2)(8) ring motifs by pairs of O-H⋯O hydrogen bonds.

| S-EPMC3200747 | biostudies-literature

N'-(3-Eth-oxy-2-hy-droxy-benzyl-idene)-2-hy-droxy-3-methyl-benzohydrazide.

Project description:The title compound, C(17)H(18)N(2)O(4), crystallizes with two independent mol-ecules in the asymmetric unit. The two benzene rings in each mol-ecule make dihedral angles of 7.6?(3) and 3.9?(3)°. Intra-molecular O-H?N and O-H?O hydrogen bonds are present in each mol-ecule. In the crystal, N-H?O hydrogen bonds link the mol-ecules into chains propagating in [010]. The are also a number of C-H?O and ?-? inter-actions present [centroid-centroid distances = 3.874?(4) and 3.904?(3)?Å], that result in the formation of a three-dimensional network.

| S-EPMC3275245 | biostudies-literature

(2E)-2-(3-Eth-oxy-2-hy-droxy-benzyl-idene)hydrazinecarboxamide.

Project description:The title compound, C10H13N3O3, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. A classical intra-molecular O-H⋯N hydrogen bond is present. The two N atoms of the hydrazinecarboxamide unit are also involved in inter-molecular N-H⋯O hydrogen bonds, with the O atom of the hydrazinecarboxamide group acting as the acceptor. Pairs of N-H⋯O hydrogen bond link the mol-ecules into centrosymmetric dimers, which are linked by further N-H⋯O hydrogen bonds into chains along the b axis. The chains are linked by C-H⋯π inter-actions.

| S-EPMC3629631 | biostudies-literature

2-Eth-oxy-6-({2-[(3-eth-oxy-2-hy-droxy-benzyl-idene)amino]-benz-yl}imino-meth-yl)phenol.

Project description:The title compound, C(25)H(26)N(2)O(4), exists in an E conformation with respect to each azomethine link. The two phenol-substituted benzene rings are twisted away from the plane of the diimine benzene ring by dihedral angles of 27.25 (5) and 56.67 (5)°. The mol-ecular structure is stabilized by intra-molecular O-H⋯N hydrogen bonds.

| S-EPMC3414937 | biostudies-literature

4-({(Z)-5-[(Z)-3-Eth-oxy-4-hy-droxy-benzyl-idene]-3-methyl-4-oxo-1,3-thia-zolidin-2-yl-idene}amino)-benzoic acid dimethyl-formamide monosolvate.

Project description:The mol-ecular structure of the title compound, C20H18N2O5S·C3H7NO, represents an essentially planar 5-benzyl-idene-thia-zolidine moiety (r.m.s. deviation from planarity without ring substituents = 0.095?Å) to which the 4-amino-benzoic acid fragment is inclined at 76.23?(1)°. In the crystal, the benzoic acid mol-ecules are arranged in layers parallel to [001] which are built up from inversion dimers held together by head-to-tail phenol-carb-oxy O-H?O hydrogen bonds and head-to-tail ?-? stacking inter-actions between the 5-benzyl-idene-thia-zolidine moieties (ring centroid distance = 3.579?Å). These layers are separated by the dimethyl-formamide solvent mol-ecules which are firmly anchored via a short O-H?O hydrogen bond [O?O = 2.5529?(10)?Å] donated by the -COOH group.

| S-EPMC3589002 | biostudies-literature

1-(4-{[(E)-3-Eth-oxy-2-hy-droxy-benzyl-idene]amino}-phen-yl)ethanone oxime.

Project description:In the title compound, C(17)H(18)N(2)O(3), the benzene rings form a dihedral angle of 3.34?(2)°. There is a strong intra-molecular O-H?N hydrogen bonds (which induces planarity of the structure). In the crystal, mol-ecules are linked by pairs of O-H?N hydrogen bonds, forming inversion dimers.

| S-EPMC3275186 | biostudies-literature

(E)-N'-(4-Eth-oxy-benzyl-idene)-4-hy-droxy-benzohydrazide dihydrate.

Project description:The benzohydrazide mol-ecule of the title compound, C(16)H(16)N(2)O(3)·2H(2)O, exists in a trans conformation with respect to the C=N double bond. The central O=C-NH-N=C plane [r.m.s. deviation of 0.0165?(1)?Å for the five non-H atoms] makes dihedral angles of 6.04?(8) and 2.38?(8)°, respectively, with the hy-droxy- and eth-oxy-substituted benzene rings. The dihedral angle between these benzene rings is 3.82?(7)°. The eth-oxy group is almost coplanar with the attached benzene ring with a C-O-C-C torsion angle of -176.58?(11)°. In the crystal, the benzohydrazide and water mol-ecules are linked by N-H?O, O-H?O , O-H?N and C-H?O hydrogen bonds into a three-dimensional network.

| S-EPMC3379254 | biostudies-literature

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