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organic compounds
The crystal structures of the title compounds, C17H15BrN2O2, (I), and C18H18N2O2, (II), determined at room temperature, have a trans configuration with respect to the diazene linkage, as found for other azo (diazene) derivatives. The aromatic mean planes are nearly coplanar, with a dihedral angle between these planes of 8.31 (2)° for (I) and 3.74 (2)° for (II). In both complexes, the mean plane of the ester group is nearly perpendicular to the aromatic ring planes. In both compounds, the crystal packing involves only π–π and π–ring interactions, which combine to stabilize the extended structure.
organic compounds
The title compounds, (E)-2-[(2-bromophenyl)iminomethyl]-4-methoxyphenol, C14H12BrNO2, (I), (E)-2-[(3-bromophenyl)iminomethyl]-4-methoxyphenol, C14H12BrNO2, (II), and (E)-2-[(4-bromophenyl)iminomethyl]-4-methoxyphenol, C14H12BrNO2, (III), adopt the phenol–imine tautomeric form. In all three structures, there are strong intramolecular O—H
N hydrogen bonds. Compound (I) has strong intermolecular hydrogen bonds, while compound (III) has weak intermolecular hydrogen bonds. In addition to these intermolecular interactions, C—Hπ interactions in (I) and (III), and π–π interactions in (I), play roles in the crystal packing. The dihedral angles between the aromatic rings are 15.34 (12), 6.1 (3) and 39.2 (14)° for (I), (II) and (III), respectively.
N hydrogen bonds. Compound (I) has strong intermolecular hydrogen bonds, while compound (III) has weak intermolecular hydrogen bonds. In addition to these intermolecular interactions, C—Hπ interactions in (I) and (III), and π–π interactions in (I), play roles in the crystal packing. The dihedral angles between the aromatic rings are 15.34 (12), 6.1 (3) and 39.2 (14)° for (I), (II) and (III), respectively.organic compounds
The title Schiff base compound, C28H26N2O2, possesses both OH and NH tautomeric character in its molecular structure. While the OH side of the compound is described as an intermediate state, its NH side adopts a predominantly zwitterionic form. The molecular structure of the compound is stabilized by both N+—HO− and O—HN intramolecular hydrogen bonds. There are two weak C—HO hydrogen bonds leading to polymeric chains of topology C(5) and C(13) running along the b axis of the unit cell. In addition, intermolecular C—Hπ interactions serve to stabilize the extended structure.
O− and O—HN intramolecular hydrogen bonds. There are two weak C—HO hydrogen bonds leading to polymeric chains of topology C(5) and C(13) running along the b axis of the unit cell. In addition, intermolecular C—Hπ interactions serve to stabilize the extended structure.organic compounds
Molecules of the title compound, C24H19NO6S, adopt the Z configuration and have a distorted tetrahedral geometry around the S atom. The oxazolone, 2-phenyl and methoxyphenyl rings are approximately coplanar. The C atom between the methoxyphenyl and oxazolone rings displays a distorted trigonal bonding geometry. Pairs of molecules are linked into dimers through weak C—HO hydrogen bonds.
O hydrogen bonds.metal-organic compounds
The title compound, [Co(C7H4FO2)2(C6H6N2O)2(H2O)2], is a three-dimensional hydrogen-bonded supramolecular complex. The CoII ion resides on a centre of symmetry and is in an octahedral coordination environment comprising two pyridyl N atoms, two carboxylate O atoms and two O atoms from water molecules. Intermolecular N—HO and O—HO hydrogen bonds produce R32(6), R22(12) and R22(16) rings, which lead to two-dimensional chains. An extensive three-dimensional network of C—HF, N—HO and O—HO hydrogen bonds and π–π interactions are responsible for crystal stabilization.
O and O—HO hydrogen bonds produce R32(6), R22(12) and R22(16) rings, which lead to two-dimensional chains. An extensive three-dimensional network of C—HF, N—HO and O—HO hydrogen bonds and π–π interactions are responsible for crystal stabilization.metal-organic compounds
In the title compound, poly[(μ3-boric acid)-μ4-maleato-dipotassium], [K2(C4H2O4){B(OH)3}]n, there are two independent K+ cations, one bonded to seven O atoms (three from boric acid and four from maleate), and the other eight-coordinate via three boric acid and four maleate O atoms and a weak η1-type coordination to the C=C bond of the maleate central C atoms. Hydrogen bonding links the boric acid ligands and maleate dianions, completing the packing structure.
organic compounds
The title compound, C6H12N4, has four crystallographically independent molecules in the asymmetric unit. Intermolecular N—HN hydrogen bonds involving amino groups and triazole N atoms form a three-dimensional framework involving R44(10) and R44(20) rings. The hydrogen bonding is supported by weak C—Hπ interactions.
N hydrogen bonds involving amino groups and triazole N atoms form a three-dimensional framework involving R44(10) and R44(20) rings. The hydrogen bonding is supported by weak C—Hπ interactions.metal-organic compounds
The title compound, [Cu(C7H5O3)2(C6H6N2O)2(H2O)2], is a two-dimensional hydrogen-bonded supramolecular complex. The CuII ion resides on a centre of symmetry and is in an octahedral coordination environment comprising two pyridine N atoms, two carboxylate O atoms and two O atoms from water molecules. Intermolecular N—HO and O—HO hydrogen bonds produce R22(4), R22(8) and R22(15) rings which lead to one-dimensional polymeric chains. An extensive two-dimensional network of N—HO and O—HO hydrogen bonds and C—Hπ interactions are responsible for crystal stabilization.
O and O—HO hydrogen bonds produce R22(4), R22(8) and R22(15) rings which lead to one-dimensional polymeric chains. An extensive two-dimensional network of N—HO and O—HO hydrogen bonds and C—Hπ interactions are responsible for crystal stabilization.
