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2,2'-[(Propane-1,3-diyldinitrilo)bis-(phenyl-methyl-idyne)]diphenol.

ABSTRACT: In the title mol-ecule, C(29)H(26)N(2)O(2), there are two strong intra-molecular O-H⋯N hydrogen bonds involving the hydr-oxy and imine groups, forming S(6) ring motifs. The dihedral angles between adjacent phenyl rings and phenol-containing planes are 85.27 (19) and 91.38 (18)°. In the crystal structure, weak inter-molecular C-H⋯O hydrogen bonds connect mol-ecules into a two-dimensional network.

SUBMITTER: Black RS

PROVIDER: S-EPMC2983949 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4,4',5,5'-Tetra-methyl-2,2'-[1,1'-(propane-1,3-diyldinitrilo)diethyl-idyne]diphenol.

Project description:The title Schiff base compound, C(23)H(30)N(2)O(2), has crystallographic twofold rotation symmetry. An intra-molecular O-H?N hydrogen bond forms a six-membered ring, producing an S(6) ring motif. The imino group is coplanar with the benzene ring. The two benzene rings are almost perpendicular to each other, making a dihedral angle of 87.38?(4)°. In the crystal structure, neighbouring mol-ecules are linked along the c axis by weak inter-molecular C-H?O hydrogen bonds and are further packed into columns along the b axis, forming sheets which are parallel to the bc plane.

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2,2'-[(E,E)-1,1'-(2,2-Dimethyl-propane-1,3-diyldinitrilo)diethyl-idyne]diphenol.

Project description:The title Schiff base, C(21)H(26)N(2)O(2), contains two intra-molecular O-H?N hydrogen bonds between the hydroxyl groups and the nearest imine N atoms, each leading to a six-membered ring. Weak C-H?O hydrogen bonds result in a ladder network running along the a axis. In addition, inter-molecular C-H?? inter-actions serve to stabilize the extended structure.

| S-EPMC2969254 | biostudies-literature

6,6'-Dieth-oxy-2,2'-[propane-1,3-diyl-dioxy-bis(nitrilo-methyl-idyne)]diphenol.

Project description:The complete mol-ecule of the title compound, C(21)H(26)N(2)O(6), is generated by a crystallographic twofold axis and adopts a trans configuration with respect to the azomethine group. The two benzene rings are almost perpendicular to one another, making a dihedral angle of 89.53?(3)°. In the mol-ecular structure, pairs of intra-molecular O-H?N hydrogen bonds generate two six-membered rings. The crystal structure is further stabilized by inter-molecular C-H?O hydrogen bonds, which link four adjacent mol-ecules into a network structure.

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6,6'-Dihydr-oxy-2,2'-[(propane-1,3-diyl-dioxy)bis-(nitrilo-methyl-idyne)]diphenol.

Project description:The mol-ecule of the title compound, C(17)H(18)N(2)O(6), adopts a V-shaped conformation, the dihedral angle between the two halves of the mol-ecule being 81.31?(4) °. There is one half-mol-ecule in the asymmetric unit, with a crystallographic twofold rotation axis passing through the central C atom. There are strong intra-molecular O-H?N and O-H?O hydrogen bonds involving the hydr-oxy group and adjacent O and N atoms. In the crystal structure, inter-molecular O-H?O hydrogen bonds link the mol-ecules, forming an infinite three-dimensional supra-molecular structure.

| S-EPMC2960728 | biostudies-literature

4,4'-Dichloro-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The crystal of the title Schiff base compound, C(19)H(20)Cl(2)N(2)O(2), contains of two crystallographically independent mol-ecules with similar conformations. In each mol-ecule, two intramolecular O-H⋯N bonds generate S(6) motifs. The N atoms are also in close proximity to two H atoms of the dimethyl-propane groups, with H⋯N distances between 2.59 and 2.62 Å. The imine group is coplanar with the benzene ring. The dihedral angles between the benzene rings in the two independent mol-ecules are 58.20 (12) and 47.95 (12)°. The structure displays short inter-molecular Cl⋯Cl [3.3869 (11) Å] and Cl⋯O [3.175 (2)-3.204 (2) Å] inter-actions. The crystal structure is further stabilized by weak inter-molecular C-H⋯O, C-H⋯π and π-π [centroid-centroid distances 3.6416 (13)-3.8705 (14) Å] inter-actions.

| S-EPMC2967979 | biostudies-literature

6,6'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The title Schiff base compound, C(21)H(26)N(2)O(4), exhibits two crystallographically independent mol-ecules in the asymmetric unit with similar conformations. The imino groups are coplanar with the benzene rings; the maximum deviations of the N atoms from the planes comprising the benzene rings and the imino groups are -0.037 (4), 0.013 (4), -0.021 (5), and 0.008 (5) Å. The dihedral angles between the benzene rings in the two mol-ecules are 53.64 (17) and 51.93 (17)°. Strong intra-molecular O-H⋯N hydrogen bonds generate S(6) ring motifs. The N atoms are also in close proximity to the H atoms of the dimethyl-propane groups, with H⋯N distances between 2.54 and 2.75 Å. The crystal structure is further stabilized by weak inter-molecular C-H⋯O hydrogen bonds, weak inter-molecular C-H⋯π inter-actions and π-π contacts involving the imine C atom and two C atoms from the adjacent benzene rings.

| S-EPMC2967940 | biostudies-literature

5,5'-Dimeth-oxy-2,2'-[2,2-dimethyl-propane-1,3-diylbis(nitrilo-methyl-idyne)]diphenol.

Project description:The asymmetric unit of the title Schiff base compound, C(21)H(26)N(2)O(4), consists of four crystallographically independent mol-ecules, viz. A, B, C and D. The A and D, and the B and C mol-ecules are related by a pseudo-inversion centre, and the remaining pairs of mol-ecules differ in the orientations of one of the meth-oxy groups. In each independent mol-ecule, intra-molecular O-H⋯N hydrogen bonds generate two S(6) ring motifs. The dihedral angles between the benzene rings in mol-ecules A, B, C and D are 65.86 (19), 50.41 (19), 68.59 (19) and 50.85 (19)°, respectively. In the crystal structure, mol-ecules are linked by C-H⋯O hydrogen bonds, forming R(2) (2)(8) dimers. In addition, weak C-H⋯π inter-actions are observed.

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4,4'-Dimethoxy-2,2'-[1,1'-(propane-1,3-diyldinitrilo)diethylidyne]diphenol.

Project description:In the crystal structure, the title Schiff base compound, C(21)H(26)N(2)O(4), has twofold rotation symmetry. The imino group is coplanar with the aromatic ring. An intra-molecular O-H⋯N hydrogen bond forms a six- membered ring, producing an S(6) ring motif. The two benzene rings are almost perpendicular to each other, making a dihedral angle of 85.00 (2)°. The meth-oxy group is approximately coplanar with the benzene ring, with a C-O-C-C torsion angle of 2.34 (12)°. Neighbouring mol-ecules are linked together by weak inter-molecular C-H⋯O hydrogen bonds and a C-H⋯π inter-action, forming a sheet parallel to the ab plane. The mol-ecules also adopt a zigzag arrangement along the c axis.

| S-EPMC2960484 | biostudies-literature

6,6'-Dieth-oxy-2,2'-[propane-1,2-diyl-bis(nitrilo-methyl-idyne)]diphenol.

Project description:In the title mol-ecule, C(21)H(26)N(2)O(4), the dihedral angle between the two benzene rings is 88.4?(3)°. Two fairly strong intra-molecular O-H?N hydrogen bonds may, in part, influence the mol-ecular conformation.

| S-EPMC2968515 | biostudies-literature

2,2'-[1,1'-(Propane-1,3-diyldioxy-dinitrilo)diethyl-idyne]diphenol.

Project description:The title compound, C(19)H(22)N(2)O(4), was synthesized by the reaction of 2'-hydroxy-acetophenone with 1,3-bis-(amino-oxy)propane in ethanol. Intra-molecular O-H?N and weak C-H?O hydrogen bonds stabilize the three-dimensional structure. A twofold rotation axis passes through the molecule.

| S-EPMC2961531 | biostudies-literature

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