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2-[(2-Hy-droxy-benz-yl)amino]-pyrazinium perchlorate-2-[(pyrazin-2-yl-amino)-meth-yl]phenol (1/1).

ABSTRACT: In the crystal structure of the title co-crystal, C(11)H(12)N(3)O(+)·ClO(4) (-)·C(11)H(11)N(3)O, the perchlorate ion is disordered about a twofold rotation axis with the Cl atom located on the twofold rotation axis; the 2-[(2-hy-droxy-benz-yl)amino]-pyrazinium cation and the neutral 2-[(pyrazin-2-yl-amino)-meth-yl]phenol mol-ecule are disordered about the rotation axis in a 1:1 ratio. These two are connected by a pyrazine-pyrazine N(1)-H⋯N(4) hydrogen bond. The cation, whose two aromatic rings are twisted along the -CH(2)-NH- bond by 76.8 (1)°, is a hydrogen-bond donor to the perchlorate ion through the N atom of this link.

SUBMITTER: Gao S

PROVIDER: S-EPMC3414930 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-{[(2-Hy-droxy-3,5-dimethyl-benz-yl)(meth-yl)amino]-meth-yl}-4,6-dimethyl-phenol.

Project description:In the title compound, C(19)H(25)NO(2), the dihedral angle between the benzene rings is 53.15?(8)°. One of the -OH groups forms an intra-molecular O-H?N link, generating an S(6) ring. The other -OH group forms an inter-molecular O-H?N hydrogen bond in the crystal, generating centrosymmetric R(2) (2)(20) loops.

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Project description:The title compound, C26H40N2O2, has both its N atoms in trigonal-pyramidal geometries. The mol-ecular structure is stabilized by O-H?N and C-H?O hydrogen bonds. In the crystal, C-H?? inter-actions lead to the formation of a supramolecular helical chain along the b-axis direction.

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rac-4-Chloro-2-[({2-[(3-chloro-6-hy-droxy-2,4-dimethyl-benz-yl)(meth-yl)amino]-prop-yl}(meth-yl)amino)-meth-yl]-3,5-dimethyl-phenol.

Project description:The title compound, C(23)H(32)Cl(2)N(2)O(2), a potential chiral ligand for coordination chemistry, was prepared by a two-step reaction. The mol-ecule is located on a crystallographic centre of inversion. As a result, the methyl group bonded to the methyl-ene group is disordered over two equally occupied positions, sharing the same site as the H atom of the chiral C atom. As a further consequence of the crystallographic centrosymmetry, the 1,2-diamino-propane unit adopts an anti-periplanar conformation and the two benzene rings are coplanar. The central chain is in an all-trans arrangement. An intra-molecular O-H?N hydrogen bond makes an S(6) ring motif. A C-H?? inter-action links the mol-ecules into one-dimensional chains along the [001] direction.

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2-{[(Pyrazin-2-yl)amino]-meth-yl}phenol.

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Crystal structure of 3-[({2-[bis-(2-hy-droxy-benz-yl)amino]-eth-yl}(2-hy-droxy-benz-yl)amino)-meth-yl]-2-hydroxy-5-methyl-benzaldehyde.

Project description:The non-symmetric title mol-ecule, C32H34N2O5, is based on a tetra-substituted ethyl-enedi-amine backbone. The mol-ecular structure consists of three hy-droxy-benzyl groups and one 2-hy-droxy-5-methyl-benzaldehyde group bonded to the N atoms of the di-amine unit. The ethyl-enedi-amine skeleton shows a regular extended conformation, while the spatial orientation of the phenol arms is governed by hydrogen bonds. In the 2-hy-droxy-5-methyl-benzaldehyde group, an intra-molecular S(6) O-H?O hydrogen bond is observed between the alcohol and aldehyde functions, and the neighbouring phenol arm participates in an intra-molecular S(6) O-H?N hydrogen bond. The third phenol group is involved in a bifurcated intra-molecular hydrogen bond with graph-set notation S(6) for O-H?N and O-H?O intra-molecular hydrogen bonds between neighbouring amine and phenol arms, respectively. Finally, the fourth phenol group acts as an acceptor in a bifurcated intra-molecular hydrogen bond and also acts as donor in an inter-molecular hydrogen bond, which connects inversion-related mol-ecules into dimers with R 4 (4)(8) ring motifs.

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(E)-2-{[2-(2-Hy-droxy-ethyl-amino)-ethyl-imino]-meth-yl}phenol.

Project description:The asymmetric unit of the title compound, C(11)H(16)N(2)O(2), contains two independent conformational isomers which show intra-molecular aromatic-imine O-H?N hydrogen bonds. In the crystal, neighboring mol-ecules are linked through inter-molecular aliphatic-aliphatic O-H?N, aliphatic-aromatic N-H?O and C-H?O inter-actions into hydrogen-bonded layers parallel to the ab plane.

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