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5,5'-Dimeth-oxy-2,2'-[(pentane-1,5-diyl-dioxy)bis-(nitrilo-methyl-idyne)]diphenol.

ABSTRACT: The mol-ecule of the title compound, C(21)H(26)N(2)O(6), which lies across a crystallographic inversion centre, crystallizes with two unique half-molecules in the symmetric unit and adopts a linear configuration and the imino group is coplanar with the aromatic ring, making a dihedral angle of 3.26?(3)°. Strong intra-molecular O-H?N and weak inter-molecular O-H?O and C-H?O hydrogen bonds and weak inter-molecular ?-? stacking inter-actions [centroid-centroid distance = 4.419?(2)?Å]establish an infinite three-dimensional supra-molecular structure.

SUBMITTER: Sun YX

PROVIDER: S-EPMC2977826 | biostudies-other | 2009

REPOSITORIES: biostudies-other

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5,5'-Dimeth-oxy-2,2'-[(pentane-1,5-diyl-dioxy)bis-(nitrilo-methyl-idyne)]diphenol.

Sun Yin-Xia YX Li Li L Dong Wen-Kui WK Wu Jian-Chao JC Tong Jun-Feng JF

Acta crystallographica. Section E, Structure reports online 20090430 Pt 5

The mol-ecule of the title compound, C(21)H(26)N(2)O(6), which lies across a crystallographic inversion centre, crystallizes with two unique half-molecules in the symmetric unit and adopts a linear configuration and the imino group is coplanar with the aromatic ring, making a dihedral angle of 3.26 (3)°. Strong intra-molecular O-H⋯N and weak inter-molecular O-H⋯O and C-H⋯O hydrogen bonds and weak inter-molecular π-π stacking inter-actions [centroid-centroid distance = 4.419 (2) Å]establish an in ...[more]

PMID: 21583963

Similar Datasets

6,6'-Dihydr-oxy-2,2'-[(pentane-1,5-diyl-dioxy)bis-(nitrilo-methyl-idyne)]diphenol.

Project description:The mol-ecule of the title compound, C(19)H(22)N(2)O(6), assumes a W-shaped configuration with the dihedral angle between the two halves of the mol-ecule being 82.48?(5)°. There is one half-mol-ecule in the asymmetric unit with a crystallographic twofold rotation axis passing through the central C atom of the five methylene groups in the [-CH=N-O-(CH(2))(5)-O-N=CH-] bridge. The dihedral angle formed by the two benzene rings in each mol-ecule of the title compound is 84.18?(4)°. There are strong intra-molecular O-H?N and O-H?O hydrogen bonds and weak inter-molecular ?-? stacking inter-actions between neighbouring benzene rings, and the inter-molecular plane-to-plane distances are 3.488?(2) and 3.841?(3)?Å along the b and c axes, respectively. In the crystal structure, inter-molecular O-H?O hydrogen bonds link each mol-ecule to two others, forming an infinite three-dimensional supra-molecular structure.

| S-EPMC2962213 | biostudies-literature

2,2'-{1,1'-[Pentane-1,5-diyl-bis(oxy-nitrilo)]-diethyl-idyne}diphenol.

Project description:In the title compound, C(21)H(26)N(2)O(4), there is half a mol-ecule in the asymmetric unit with a crystallographic twofold rotation axis passing through the central C atom of the -CH=N-O-(CH(2))(5)-O-N=CH- bridge. The dihedral angle formed by the two benzene rings is 80.85?(2)°. Strong intra-molecular O-H?N and C-H?O hydrogen bonds help to establish the molecular conformation. There are also weak inter-molecular ?-? stacking inter-actions between neighbouring benzene rings [centroid-centroid separation = 3.502?(3)?Å].

| S-EPMC2959680 | 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.

| S-EPMC2983666 | biostudies-literature

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.

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5,5'-Dimeth-oxy-2,2'-[(nonane-1,9-diyldi-oxy)bis-(nitrilo-methyl-idyne)]diphenol.

Project description:The mol-ecule of the title compound, C(25)H(34)N(2)O(6), adopts a fully extended configuration. The oxime (-CH=N-O-) group is coplanar with the aromatic ring and the two benzene rings are almost parallel, making a dihedral angle of 0.16?(3)°. In the crystal structure, strong intra-molecular O-H?N hydrogen bonds generate six-membered S(6) ring motifs. Inter-molecular C-H?O hydrogen bonds link each mol-ecule to five others, forming an infinite three-dimensional supra-molecular structure. The crystal is further stabilized by ?-? stacking inter-actions between neighbouring benzene rings [centroid-centroid distance = 3.744?(2)?Å].

| S-EPMC2971058 | 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?? inter-actions are observed.

| S-EPMC2959808 | biostudies-other

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

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

5,5'-Dimeth-oxy-2,2'-[4,5-dimethyl-o-phenyl-enebis(nitrilo-methyl-idyne)]diphenol.

Project description:In the crystal structure of the title compound, C(24)H(24)N(2)O(4), the dihedral angles between the central and the two outer benzene rings are 48.12?(8) and 21.44?(8)°. Intra-molecular O-H?N hydrogen bonding generates S(6) rings.

| S-EPMC2983852 | biostudies-other

4,4'-Dimethyl-2,2'-[(3-aza-pentane-1,5-di-yl)bis-(nitrilo-methyl-idyne)]diphenol.

Project description:In the crystal structure of the title Schiff base, C(20)H(25)N(3)O(2), the salicylaldimine groups at each end of the mol-ecule are essentially planar and make a dihedral angle of 84.94?(3)° with each other. There are strong intra-molecular O-H?N hydrogen bonds and a weak inter-molecular N-H?O hydrogen bond.

| S-EPMC2961844 | biostudies-other

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