nan Ejaz

Structural characterization of a new copper(II) complex of 1,10-phenanthroline and benzoate [Cu(phen)(C6H5CO2−)2]

A new mixed-ligand copper(II) complex of 1,10-phenanthroline (phen) and benzoate ligands having the general formula [Cu(phen)(C6H5CO2)2] is prepared and its crystal structure is determined by X-ray crystallography. The complex exists in the monomeric form; the coordination environment around the copper(II) ion is square planar, with the pair of monodentate benzoate ligands being in a cis disposition. In the crystal, the molecules are linked into [001] chains by weak C-H⋯O interactions; no aromatic π-π stacking occurs.

N,N′-[1,3-Phenylenebis(methyl­ene)]dibenzene­sulfonamide

The complete molecule of the title compound, C20H20N2O4S2, is generated by crystallographic twofold symmetry, with two C atoms lying on the rotation axis. The dihedral angle between the central benzene ring and the pendant ring is 68.42 (6)° and the dihedral angle between the pendant rings is 45.11 (5)°. The torsion angles for the C—S—N—C and S—N—C—C fragments are −73.22 (15) and −150.45 (13)°, respectively. In the crystal, molecules are linked by N—H⋯O hydrogen bonds, generating corrugated (001) sheets. Aromatic π–π stacking [centroid–centroid separation = 3.8925 (12) and 3.9777 (12) Å] and weak C—H⋯O interactions also occur.

Crystal structure of new melamine bridged polymeric complex of copper(II)

The new co-crystal copper(II) melamine complex poly[bis(μ-methacrylato)μ-(1,3,5-triazine-2,4,6-triamine)], C19H26Cu2N6O8 (1) crystallizes in the triclinic P-1 space group with a = 8.9670(2) Å, b = 9.4108(2) Å, c = 15.4476(3) Å, α = 96.6090(10)°, β = 100.6270(9)°, γ = 95.5950(10)°. Each Cu(II) exhibits a pseudooctahedral geometry. Four coplanar carboxylate oxygen atoms coordinated to the Cu(II) ion define the basal plane, whereas the apical position is occupied by one nitrogen atom from the melamine ligand. Here, the carboxylato-bridged two dinuclear copper(II) complexes are linked through melamine giving a 1D alternating chain. The structure of 1 consists of a two-dimensional supramolecular layer constructed by intermolecular N-H...N hydrogen bonds of the melamine ligands from adjacent one-dimensional [Cu2(C4H5O2)4(C3H6N6)] chains.

N,N′-Diethyl-N,N′-[1,3-phenylene­bis(methyl­ene)]dibenzene­sulfonamide

In the title compound, C24H28N2O4S2, the dihedral angles between the central benzene ring and the pendant rings are 77.44 (11) and 79.23 (10)°, and the dihedral angle between the pendant rings is 23.31 (12)°. Both sulfonamide groups project to the same side of the central benzene ring and the molecule has approximate non-crystallographic mirror symmetry. One of the ethyl side chains is disordered over two sets of sites in a 0.526 (14):0.474 (14) ratio. In the crystal, inversion dimers linked by pairs of weak C—H⋯O interactions occur, generating R 2 2(28) loops.

N-[3-(Benzene­sulfonamido)­prop­yl]benzene­sulfonamide

In the title compound, C15H18N2O4S2, the dihedral angle between the aromatic rings is 71.8 (2)°. The conformation of the central N—C—C—C—N fragment is gauche–gauche [torsion angles = 72.5 (5) and 65.7 (5)°]. Both N atoms adopt pyramidal geometries. In the crystal, molecules are linked by N—H⋯O hydrogen bonds, generating (001) sheets, and weak C—H⋯O interactions consolidate the packing.

Bis(cyanido-κC)bis-(cyclo-hexyl-amine-κN)mercury(II).

In the title compound, [Hg(CN)2(C6H13N)2], the HgII ion adopts an extremely distorted HgC2N2 tetrahedral coordination. The crystal packing is influenced by weak N—H⋯N hydrogen bonds between the amino groups and the cyanide N atoms, resulting in chains of molecules propagating in [110]. Both cyclohexylamine molecules adopt chair conformations.

Diazido-bis(propane-1,3-diamine)copper(II).

In the title complex, [Cu(N3)2(C3H10N2)2], the CuII ion resides on a centre of symmetry and is in a Jahn–Teller distorted octahedral coordination environment comprising two N atoms from azide anions in axial positions and four N atoms from propane-1,3-diamine (tn) ligands in equatorial positions. Intermolecular N—H⋯N hydrogen bonds produce R 2 1(6), R 2 2(8), R 2 2(12) and R 4 2(8) rings, generating a two-dimensional layer.

2,2',5,5'-Tetra-chloro-N,N'-diethyl-N,N'-[benzene-1,3-diylbis(methyl-ene)]dibenzene-sulfonamide.

In the title compound, C24H24Cl4N2O4S2, the dihedral angles between the central benzene ring and the pendant rings are 58.09 (10) and 62.59 (10)°. The dihedral angle between the pendant rings is 81.64 (9)°. Both sulfonamide groups lie to the same side of the central ring but the C—S—N—C torsion angles [73.09 (16) and −117.35 (14)] and S—N—C—C torsion angles [−143.80 (14) and −111.45 (16)°] differ significantly for the two pendant chains. The N atoms are close to planar (bond angle sums = 356.4 and 359.5°). In the crystal, weak C—H⋯O and C—H⋯Cl interactions link the molecules.

N,N'-[1,3-Phenyl-enebis(methyl-ene)]di-p-toluenesulfonamide.

In the title compound, C22H24N2O4S2, the dihedral angles between the central benzene ring and the pendant rings are 66.96 (13) and 69.37 (13)°. The torsion angles for the C—N—S—C fragments are −68.5 (3) and −72.6 (3)°. In the crystal, molecules are linked by N—H⋯O hydrogen bonds to generate infinite (001) sheets containing R 4 4(28) loops. A weak aromatic π–π stacking contact between one of the terminal benzene rings and its inversion-related partner is also observed [centroid-to-centroid separation = 3.796 (2) Å and slippage = 1.581 Å], as are two possible C—H⋯π contacts.

N'-[(Z)-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methyl-idene]-2-hy-droxy-benzohydrazide.

In the title compound, C19H18N4O3, the pyrazole ring is oriented at dihedral angles of 41.12 (7) and 12.25 (10)°, respectively, with respect to the planes of the phenyl and benzene rings. Intramolecular N—H⋯O and O—H⋯O hydrogen bonds generate seven- and six-membered S(7) and S(6) ring motifs, respectively.