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Crystal structure of (E)-5-di-ethyl-amino-2-({[4-(di-methyl-amino)-phen-yl]imino}-meth-yl)phenol.

ABSTRACT: The title Schiff base compound, C19H25N3O, is approximately planar, with a dihedral angle of 9.03 (13)° between the planes of the aromatic rings, and has an E conformation about the N=C bond. The mol-ecular structure is stabilized by an intra-molecular O-H⋯N hydrogen bond, with an S(6) ring motif. In the crystal, mol-ecules are linked by C-H⋯π inter-actions, forming sheets parallel to the bc plane.

SUBMITTER: Rani CV

PROVIDER: S-EPMC4518928 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Crystal structure of 5-di-ethyl-amino-2-({[4-(di-ethyl-amino)-phen-yl]imino}-meth-yl)phenol.

Project description:In the title compound, C21H29N3O, the dihedral angle between the planes of the aromatic rings is 8.1 (2)°. The ethyl groups at one terminal site of the compound are disordered over two sets of sites with occupancies of 0.775 (9) and 0.225 (9). The mol-ecule has an E conformation about the N=C bond. The mol-ecular structure features an intra-molecular O-H⋯N hydrogen bond, which closes an S(6) loop. In the crystal, weak C-H⋯π inter-actions leads to the formation of a three-dimensional network.

| S-EPMC4647405 | biostudies-literature

Crystal structure of 4-chloro-2-{(E)-[(3,4-di-methyl-phen-yl)imino]-meth-yl}phenol.

Project description:In the title compound, C15H14ClNO, which is isostructural with its bromo analogue [Tahir et al. (2012 ▶). Acta Cryst., E68, o2730], the dihedral angle between the planes of the aromatic rings is 2.71 (7)° and an intra-molecular O-H⋯N hydrogen bond closes an S(6) ring. In the crystal, extremely weak C-H⋯π inter-actions link the mol-ecules into a three-dimensional network.

| S-EPMC4459303 | biostudies-literature

2-{(E)-[4-(Di-phenyl-amino)-phen-yl]imino-meth-yl}phenol.

Project description:The asymmetric unit of the title Schiff base molecule, C25H20N2O, contains two independent mol-ecules. In each mol-ecule, the C=N bond is in an E conformation. The most significant difference between the two mol-ecules is seen for the dihedral angles between the meth-oxy-substituted benzene ring and the two phenyl rings, which are 85.5 (1) and 82.3 (1)° in the first mol-ecule, and 49.0 (1) and 40.4 (1)° in the second. This conformational difference is reflected in the central C=N-C C torsion angle, which is 28.7 (2)° in the first mol-ecule and -29.8 (3)° in the other. In each mol-ecule, there is an intra-molecular O-H⋯N hydrogen bond.

| S-EPMC3998446 | biostudies-literature

2,4-Di-bromo-6-{[(5-chloro-2-methyl-phen-yl)imino]-meth-yl}phenol.

Project description:In the mol-ecular structure of the title Schiff base, C14H10Br2ClNO, the chloro-phenyl ring and di-bromo-phenol ring are almost coplanar; the dihedral angle between the planes of the two rings is 10.50 (18)°. There is an intra-molecular O-H⋯N hydrogen bond, with an O⋯N distance of 2.576 (4)Å. The crystal structure is stabilized by π-π stacking of neighbouring aromatic rings along the b-axis direction [centroid-centroid distance = 3.6896 (5) Å].

| S-EPMC3770443 | biostudies-literature

(E)-2-[(2-Amino-phen-yl)imino-meth-yl]-4,6-di-tert-butyl-phenol.

Project description:In the title compound, C(21)H(28)N(2)O, the dihedral angle between the rings is 35.2?(2)°. A weak intra-molecular O-H?N hydrogen bond is observed between the O-H H atom and the imine N atom. In the crystal, mol-ecules are linked by additional inter-molecular N-H?O hydrogen bonding, resulting in a wave-like chain along the b-axis direction.

| S-EPMC3470314 | biostudies-literature

2-{[(4-{[(2-Hy-droxy-phen-yl)(phen-yl)methyl-idene]amino}-phen-yl)imino](phen-yl)meth-yl}phenol.

Project description:The title mol-ecule, C(32)H(24)N(2)O(2), has a crystallographically imposed inversion centre and exists in the crystal as an enol-imine tautomer. The mol-ecular structure is stabilized by two strong intra-molecular O-H⋯N hydrogen bonds. The dihedral angles between the central benzene ring and the mean planes of the phenyl substituents are 59.99 (1) and 62.79 (2)°. In the crystal, the mol-ecules are arranged into (010) layers via C-H⋯π inter-actions.

| S-EPMC3238908 | biostudies-literature

2-{(1E)-1-[(3-{(E)-[1-(2-Hy-droxy-4-meth-oxy-phen-yl)ethyl-idene]amino}-2,2-di-methyl-prop-yl)imino]-eth-yl}-5-meth-oxy-phenol.

Project description:Mol-ecules of the title compound, C(23)H(30)N(2)O(4), are located on a crystallographic mirror plane. The mol-ecule has a curved shape with the dihedral angle formed between the two benzene rings being 55.26?(5)°. Intra-molecular O-H?N hydrogen bonds are noted. In the crystal, supra-molecular layers are formed in the ac plane owing to the presence of C-H?? inter-actions.

| S-EPMC3201500 | biostudies-literature

2-[1-({2-[1-(2-Hy-droxy-5-{[meth-yl(phen-yl)amino]-meth-yl}phen-yl)ethyl-idene-amino]-eth-yl}imino)-eth-yl]-4-{[meth-yl(phen-yl)amino]-meth-yl}phenol.

Project description:Mol-ecules of the title compound, C(34)H(38)N(4)O(2), lie across crystallographic inversion centres. The crystal packing can be described by alternating zigzag chains along the c axis in which the molecules are linked by van der Waals interactions. There is an intra-molecular O-H⋯N hydrogen bond and the two benzene rings in the asymmetric unit make a dihedral angle of 79.81 (6)°.

| S-EPMC3344659 | biostudies-literature

2-[(4-Ethyl-phen-yl)imino-meth-yl]-3,5-dimethoxy-phenol.

Project description:The title compound, C(17)H(19)NO(3), adopts the phenol-imine tautomeric form, with a resonance-assisted O-H?N intra-molecular hydrogen bond [O?N = 2.551?(3)?Å]. The dihedral angle between the two benzene rings is 45.42?(7)°. The two meth-oxy groups are coplanar with the attached benzene ring [C-O-C-C torsion angles = -1.1?(5) and 3.2?(4)°].

| S-EPMC2968664 | biostudies-literature

4-[(E)-(4-Methyl-phen-yl)imino-meth-yl]phenol.

Project description:In the title compound, C(14)H(13)NO, the two rings show significant deviation from coplanarity, with a dihedral angle between the two planes of 49.40 (5)°. The hy-droxy group is involved in an inter-molecular O-H⋯N hydrogen bond, forming an extended one-dimensional zigzag chain along (001).

| S-EPMC3297943 | biostudies-literature

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