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4-[(2-Hydr-oxy-1-naphth-yl)methyl-idene-amino]benzoic acid.

ABSTRACT: The mol-ecule of the title compound, C(18)H(13)NO(3), is almost planar, the dihedral angle between the naphthalene and benzene ring systems being 4.04 (6)°. The mol-ecular conformation and packing are stabilized by intra-molecular O-H⋯N and inter-molecular O-H⋯O and C-H⋯O inter-actions.

SUBMITTER: Akkurt M

PROVIDER: S-EPMC2960922 | biostudies-literature |

REPOSITORIES: biostudies-literature

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N'-[(2-Hydr-oxy-1-naphth-yl)methyl-idene]-2-nitro-benzohydrazide.

Project description:In the title Schiff base compound, C(18)H(13)N(3)O(4), prepared by the reaction of 2-hydr-oxy-1-naphthaldehyde with 2-nitro-benzohydrazide, the dihedral angle between the benzene ring and naphthyl ring system is 23.0?(2)°. There is an intra-molecular O-H?N hydrogen bond involving the naphthalene hydr-oxy substituent and a hydrazide N atom. In the crystal structure, symmetry-related mol-ecules are linked through inter-molecular N-H?O hydrogen bonds, forming chains propagating in [101].

| S-EPMC2979126 | biostudies-literature

2-Hydr-oxy-N'-[(E)-(3-hydr-oxy-2-naphth-yl)methyl-ene]benzohydrazide.

Project description:In the title mol-ecule, C(18)H(14)N(2)O(3), O-H?N and N-H?O hydrogen bonds influence the mol-ecular conformation; the benzene and naphthalene planes are inclined at a dihedral angle of 11.54?(5)°. In the crystal structure, inter-molecular O-H?O hydrogen bonds link the mol-ecules into chains running in the [01] direction.

| S-EPMC2968222 | biostudies-literature

(E)-4-{[(Pyridin-4-yl-methyl-idene)amino]-meth-yl}benzoic acid.

Project description:The title mol-ecule, C(14)H(12)N(2)O(2), exhibits a V-shaped conformation with a dihedral angle of 59.69 (3)° between the benzene and pyridine rings. In the crystal, O-H⋯N hydrogen bonds link the mol-ecules into zigzag chains along [010].

| S-EPMC3274987 | biostudies-literature

4-(8-Hydr-oxy-3-methyl-1,4-dioxo-1,4-dihydro-2-naphth-yl)butanoic acid.

Project description:In the title compound, C(15)H(14)O(5), an intramolecular O-H?O hydrogen bond occurs. In the crystal, the molecules form inversion dimers linked by pairs of O-H?O bonds, which are further linked by C-H?O interactions.

| S-EPMC2971191 | biostudies-literature

2-[(2-Hydr-oxy-1-naphth-yl)methyl-ene-amino]-1,3-benzothia-zole.

Project description:In the title compound, C(18)H(12)N(2)OS, the dihedral angle between the mean planes of the aromatic ring systems is 7.26?(8)°. There is an intra-molecular O-H?N hydrogen bond, forming a six-membered ring. In the crystal structure, inter-molecular C-H?N hydrogen bonds link the mol-ecules into a one-dimensional chain.

| S-EPMC2959411 | biostudies-other

4-(1-Naphth-yl)benzoic acid.

Project description:In the title mol-ecule, C(17)H(12)O(2), the dihedral angle between the mean plane of the benzene ring and that of the naphthalene ring system is 49.09?(6)°. In the crystal structure, mol-ecules are linked to form centrosymmetric dimers via inter-molecular O-H?O hydrogen bonds. The hydr-oxy H atom is disordered over two sites with refined occupancies of 0.62?(3) and 0.38?(3).

| S-EPMC2972074 | biostudies-literature

2-(7-Hydr-oxy-2-naphth-yloxy)-N-(6-methyl-2-pyrid-yl)acetamide.

Project description:In the title compound, C(18)H(16)N(2)O(3), the dihedral angle between the naphthalene ring system and the pyridyl ring is 18.1?(8)°. The mol-ecules are inter-connected via C-H?O and O-H?O hydrogen bonds. Inversion-related mol-ecules are linked by O-H?O hydrogen bonds into cyclic centrosymmetric R(2) (2)(22) dimers. Intra-molecular N-H?O hydrogen bonding produces an S(5) ring motif. The crystal structure is further stabilized by weak C-H-? inter-actions.

| S-EPMC2961012 | biostudies-literature

Diethyl 5-[(2-hydr-oxy-1-naphth-yl)methyl-ideneamino]-3-methyl-thio-phene-2,4-dicarboxyl-ate.

Project description:In the title compound, C(22)H(21)NO(5)S, the 2-naphthol group and the thio-phene ring are almost coplanar, with a dihedral angle of 5.75?(7)°. The structure is stabilized by intra-molecular O-H?O, O-H?N and C-H?S, and inter-molecular C-H?O hydrogen-bonding inter-actions.

| S-EPMC2961336 | biostudies-literature

3-[(Z)-(4-Diethyl-amino-6-oxocyclo-hexa-2,4-dien-1-yl-idene)methyl-amino]benzoic acid.

Project description:The title compound, C(18)H(20)N(2)O(3), crystallizes as the keto tautomer, unlike the vast majority of similar structures that have been reported that contain the hydr-oxy tautomer. There are two strong hydrogen bonds in the crystal structure, both accepted by the same carbonyl group: one intra-molecular N-H?O and one inter-molecular O-H?O. As a result, the carbonyl C=O distance is long, at 1.310?(2)?Å, which may suggest the mol-ecule has a significant zwitterionic character. The dihedral angle between the benzene ring planes is 15.05?(7)°. As a result of the intramolecular hydrogen bond, the bridging C-C=N-C group is almost coplanar with the benzene ring that has the diethylamino substituent [dihedral angle 2.35?(15)°].

| S-EPMC2915231 | biostudies-literature

2-Hydr-oxy-3-methoxy-benzoic acid monohydrate.

Project description:The asymmetric unit of the title compound, C(8)H(8)O(4)·H(2)O, contains two organic mol-ecules which are connected by the two water mol-ecules through O-H⋯O hydrogen bonds, forming an R(4) (4)(12) ring. Further O-H⋯O hydrogen bonds assemble these rings through R(6) (6)(18) rings, giving rise to infinite helical chains arranged around the b axis. These helical chains are assembled by offset π-π stacking inter-actions [centroid-centroid distance = 3.6432 (8) Å] between the aromatic rings of neigboring chains, forming a supra-molecular network.

| S-EPMC2960960 | biostudies-literature

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