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

ABSTRACT: 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.

SUBMITTER: Ambili KU

PROVIDER: S-EPMC3414937 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-[({2-[(2-Hy-droxy-5-meth-oxy-benzyl-idene)amino]-eth-yl}imino)-meth-yl]-4-meth-oxy-phenol.

Project description:The asymmetric unit of the title compound, C(18)H(20)N(2)O(4), contains one-half mol-ecule with an inversion center located at the centroid of the mol-ecule. In the crystal, mol-ecules are linked by C-H?? inter-actions, forming layers parallel to (101). An intra-molecular O-H?N hydrogen bond also occurs.

| S-EPMC3379345 | biostudies-literature

2,4-Dichloro-6-({2-[(3,5-dichloro-2-hy-droxy-benzyl-idene)amino]-eth-yl}imino-meth-yl)phenol.

Project description:The title mol-ecule, C(16)H(12)Cl(4)N(2)O(2), lies about an inversion center. The symmetry-unique part of the mol-ecule contains an intra-molecular O-H?N hydrogen bond. In the crystal, mol-ecules are arranged in corrugated layers parallel to (-101). Weak ?-? stacking inter-actions, with a centroid-centroid diatance of 3.7923?(13)?Å, are present.

| S-EPMC3379294 | biostudies-literature

2-[(2-{Bis[2-(2-hy-droxy-5-nitro-benzyl-idene-amino)-eth-yl]amino}-eth-yl)imino-meth-yl]-4-nitro-phenol acetonitrile monosolvate.

Project description:In the title compound, C(27)H(27)N(7)O(9)·CH(3)CN, the three nitro groups of the polydentate tripodal Schiff base are located approximately parallel to their respective carrier benzene rings, making dihedral angles of 3.9?(4), 5.0?(4) and 6.3?(4)°. Intra-molecular O-H?N hydrogen bonds between the hy-droxy O atoms and the imine N atoms, with O?N distances in the range 2.607?(3)-2.665?(3)?Å, form nearly planar six-membered rings. In the crystal, weak inter-molecular C-H?O and C-H?N hydrogen bonds occur and several intra- and inter-molecular ?-? inter-actions are present between adjacent benzene rings, with a shortest centroid-centroid distance of 3.507?(2)?Å.

| S-EPMC3011653 | biostudies-literature

Benzyl N-[(S)-2-hy-droxy-1-({[(E)-2-hy-droxy-4-meth-oxy-benzyl-idene]hydrazin-yl}carbon-yl)eth-yl]carbamate.

Project description:The shape of the title compound, C(19)H(21)N(3)O(6), is curved with the conformation about the imine bond [1.291 (3) Å] being E. While the hy-droxy-substituted benzene ring is almost coplanar with the hydrazinyl residue [N-N-C-C = 177.31 (18)°], an observation correlated with an intra-molecular O-H⋯N hydrogen bond leading to an S(6) ring, the remaining residues exhibit significant twists. The carbonyl residues are directed away from each other as are the amines. This allows for the formation of O-H⋯O and N-H⋯O hydrogen bonds in the crystal, which lead to two-dimensional supra-molecular arrays in the ac plane. Additional stabilization to the layers is afforded by C-H⋯π inter-actions.

| S-EPMC3011551 | biostudies-literature

2-Eth-oxy-6-{[1-(3-eth-oxy-2-hy-droxy-benz-yl)-1H-benzimidazol-2-yl]meth-yl}phenol nitro-methane monosolvate.

Project description:In the title solvate, C(24)H(24)N(2)O(4)·CH(3)NO(2), the benzene ring of the 2-eth-oxy-6-methyl-phenol substituent is approximately perpendicular to the nearly planar benzimidazole ring [maximum deviation = 0.021?(2)?Å], making a dihedral angle of 84.32?(7)°. The benzene ring of the 2-eth-oxy-phenol group is somewhat inclined to the benzimidazole ring plane by 28.03?(5)°. The dihedral angle between the benzene rings is 82.20?(9)°. The compound reveals strong intra-molecular O-H?N and O-H?O hydrogen bonds, forming six- and five-membered rings, respectively. In the crystal, mol-ecules are connected by bifurcated O-H?(O,O) hydrogen bonds, forming chains along the b axis.

| S-EPMC3379470 | biostudies-literature

2-Eth-oxy-6-[1-(3-eth-oxy-2-hy-droxy-benz-yl)-2,3-dihydro-1H-benzimidazol-2-yl]phenol acetonitrile monosolvate.

Project description:The title compound, C(24)H(24)N(2)O(4)·CH(3)CN, a disubstituted benzimidazole, crystallized as an acetonitrile monosolvate. The benzene ring of the 2-eth-oxy-6-methyl-phenol substiuent is approximately perpendicular to the nearly planar benzimidazole ring system [maximum deviation = 0.016 (1) Å], making a dihedral angle of 84.27 (8)°. The benzene ring of the 2-eth-oxy-phenol substituent is inclined to the benzimidazole mean plane by 29.68 (8)°. The dihedral angle between the benzene rings is 80.36 (9)°. In the mol-ecule, there are strong O-H⋯N and O-H⋯O hydrogen bonds. In the crystal, mol-ecules are connected by bifurcated O-H⋯(O,O) hydrogen bonds, forming chains propagating along [010].

| S-EPMC3344524 | biostudies-literature

2-{[2-(2-Hy-droxy-3-meth-oxy-benzyl-idene)hydrazin-1-yl-idene]meth-yl}-6-meth-oxy-phenol.

Project description:The title compound, C(16)H(16)N(2)O(4), was obtained from the reaction of hydrazine hydrate and o-vanilin in absolute ethanol. The mol-ecule is almost planar (except for the methyl H atoms), with a mean deviation from the plane of 0.0259?Å. The mol-ecular structure also exhibits an approximate non-crystallographic twofold axis. Intra-molecular O-H?N hydrogen bonds occur. In the crystal, inter-molecular C-H?O hydrogen bonds generate mol-ecular zigzag sheets. The sheets stack through C-H?? inter-actions, leading to a three-dimensional-network.

| S-EPMC3201493 | biostudies-literature

2-{[2-(2-Hy-droxy-5-meth-oxy-benzyl-idene)hydrazin-1-yl-idene]meth-yl}-4-meth-oxy-phenol.

Project description:The title phenyl-hydrazine derivative, C16H16N2O4, has a crystallographically imposed centre of symmetry. Except for the methyl group, all non-H atoms are almost coplanar (r.m.s. deviation = 0.0095 Å). Intra-molecular O-H⋯N hydrogen bonds are observed, generating S(6) graph-set ring motifs.

| S-EPMC3998297 | biostudies-literature

Benzyl N-(2-hy-droxy-1-{N'-[(1E)-2-hy-droxy-benzyl-idene]hydrazinecarbon-yl}eth-yl)carbamate.

Project description:The mol-ecule of the title compound, C(18)H(19)N(3)O(5), adopts a curved arrangement with the terminal benzene rings lying to the same side. The hydroxyl-benzene ring is close to coplanar with the adjacent hydrazine residue [dihedral angle = 11.14?(12)°], an observation which correlates with the presence of an intra-molecular O-H?N hydrogen bond. The benzyl ring forms a dihedral angle of 50.84?(13)° with the adjacent carbamate group. A twist in the mol-ecule, at the chiral C atom, is reflected in the dihedral angle of 80.21?(12)° formed between the amide residues. In the crystal, two-dimensional arrays in the ac plane are mediated by O-H?O and N-H?O hydrogen bonds.

| S-EPMC3151747 | 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

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