Li-Jun Han

Bis-(2-methyl-1H-imidazole-κN)bis[2-(naphthalen-2-yl)acetato-κO]copper(II).

In the crystal structure of the title compound, [Cu(C12H9O2)2(C4H6N2)2], the Cu(II) cations are square-planar coordinated by two 1-naphthylacetate anions and two 2-methyl-imidazole ligands into discrete complexes that are located on centres of inversion. These complexes are linked into chains parallel to [010] by intermolecular N—H⋯O hydrogen bonding between the N—H H atom of the 2-methyl-imidazole ligands and the carboxylate O atoms that are not involved in metal coordination.

Bis(1-methyl-1H-imidazole-κN)bis-[2-(naphthalen-1-yl)acetato-κO]copper(II) monohydrate.

In the crystal structure of the title compound, [Cu(C12H9O2)2(C4H6N2)2]·H2O, the CuII atom is coordinated by two 2-(naphthalen-1-yl)acetate anions and two 1-methylimidazole ligands, giving monomeric complexes with a square-planar coordination environment. Two complex molecules and two water molecules form a centrosymmetric ring system via O—H⋯O hydrogen bonds.

8-Benzoyl-7-hy-droxy-4-methyl-2H-1-benzopyran-2-one monohydrate.

In the title compound, C17H12O4·H2O, the coumarin ring system is approximately planar with a maximum atomic deviation of 0.011 (2) Å, and is nearly perpendicular to the phenyl ring at a dihedral angle of 86.63 (9)°. In the crystal, molecules are linked by classical O—H⋯O and weak C—H⋯O hydrogen bonds. π–π stacking is also present [centroid–centroid distance = 3.6898 (12) Å].

Syntheses, Crystal Structures, and Antibacterial Activities of the Cu(II) Complex {Cu2[5-(NO2)sal]2 (DMF)4}2 and Co(II) Complex{Co[5-(NO2)sal] (H2O)3}2

Two novel complexes, {Cu2[5-(NO2)sal]2 (DMF)4}2 (1) and {Co[5-(NO2)sal] (H2O)3}2 (2), have been prepared and characterized by elemental analysis, IR spectrum, and X-ray single-crystal diffraction. Complex 1 is a four nuclear Cu(II) complex and belongs to monoclinic system with space group C 2/c, a = 23.541(2) Å, b = 14.8150(12) Å, c = 22.459(2) Å, β = 104.361(2)°, V = 7588.0(12) Å3, D c = 1.368 Mg/m3, Z = 4, F(000) = 3216, R 1 = 0.0826, wR 2 = 0.2212 [I>2σ(I)] Every Cu(II) atom is six-coordinated by three O atoms from two 5-(NO2)sal and two O atoms from two DMF and one bridged O atom. The distance of Cu···Cu are 4.5027(14), 5.817(2), and 5.526(2) Å. Complex 2 is a dinuclear Co(II) complex and belongs to monoclinic system with space group P 21/c, a = 10.9003(9) Å, b = 13.6938(15) Å, c = 6.6781(5) Å, β = 91.223(1)°, V = 996.59(16) Å3, D c = 1.748 Mg/m3, Z = 2, F(000) = 596, R 1 = 0.1058, wR 2 = 0.3098 [I>2σ(I)] Every Co(II) atom is six-coordinated by two O atoms from one 5-(NO2)sal and three O atoms from three coordinated water and one bridged O atom, and the distance of Co···Co is 3.191(3) Å. Two complexes have been screened for antibacterial activities by the agar-diffusion method and showed good effects against Escherichia coli, Staphylococcus aureus, and Bacillus subtilis. (5-(NO2)sal = 5-nitrosalicylate anion, DMF = N, N-dimethylformamide).

Hexaaqua­cobalt(II) bis­(5-acetyl-2-hy­droxy­benzoate) dihydrate

In the title compound, [Co(H2O)6](C9H7O4)2·2H2O, the Co2+ cation lies on a twofold rotation axis and is coordinated by six water molecules in a distorted octahedral geometry. In the 5-acetyl-2-hydroxybenzoate anion, the hydroxy group links with the carboxylate group via an intramolecular O—H⋯O hydrogen bond and the acetyl group is twisted to the benzene ring at a dihedral angle of 16.99 (12)°. In the crystal structure, the cations, anions and water molecules are linked by extensive O—H⋯O hydrogen bonding.

7-Hy-droxy-4-methyl-8-(3-methyl-benzo-yl)-2H-chromen-2-one ethanol monosolvate.

In the title compound, C18H14O4·C2H6O, the coumarin ring system is approximately planar with a maximum deviation of 0.037 (3) Å and is nearly perpendicular to the benzene ring, making a dihedral angle of 86.55 (9)°. In the crystal, molecules are linked by classical O—H⋯O hydrogen bonds and weak C—H⋯O interactions.

4-Methyl-1,3-bis-(3,4-methyl-enedioxy-benz-yl)-2-(3,4-methyl-enedioxy-phen-yl)imidazolidine.

In the title compound, C27H26N2O6, the imidazolidine ring adopts an envelope conformation. The methyl group on the imidazolidine ring is disordered over two positions with occupancies of 0.517 (11) and 0.483 (11), and the 3,4-methylenedioxyphenyl at the 3-position of imidazolidine ring is also disordered over two positions with occupancies of 0.60 (2) and 0.40 (2).

4-Methyl-2-oxo-2,3-dihydro-1-benzopyran-7-yl benzene-sulfonate.

The title compound, C16H12O5S, is a derivative of coumarin. The dihedral angle between the coumarin ring system and the phenyl ring is 65.9 (1)°. In the crystal structure, molecules are linked by weak C—H⋯O hydrogen bonding to form molecular ribbons.

4‐Bromo‐N‐(3,4‐methylenedioxybenzyl)aniline

In the title compound, C14H12BrNO2, the molecules are linked by one C—H...Br hydrogen bond, so forming a C(13) chain running parallel to the [010] direction, and these chains are linked by further C—H...π and C—H...Br hydrogen bonds, resulting in a three-dimensional network structure.

The dinuclear copper(II) complexes di-μ-chlorido-bis{[N,N′-bis(4-chlorobenzyl)propane-1,2-diamine]chloridocopper(II)} and di-μ-chlorido-bis{[N,N′-bis(3,4-methylenedioxybenzyl)propane-1,2-diamine]chloridocopper(II)}

The two title dinuclear copper(II) complexes, [Cu2Cl4(C17H20Cl2N2)2], (I), and [Cu2Cl4(C19H22N2O4)2], (II), have similar coordination environments. In each complex, the asymmetric unit consists of one half-molecule and the two copper centres are bridged by a pair of Cl atoms, resulting in complexes with centrosymmetric structures containing Cu(mu-Cl)2Cu parallelogram cores; the Cu...Cu separations and Cu-Cl-Cu angles are 3.4285 (8) A and 83.36 (3) degrees, respectively, for (I), and 3.565 (2) A and 84.39 (7) degrees for (II). Each Cu atom is five-coordinated and the coordination geometry around the Cu atom is best described as a distorted square-pyramid with a tau value of 0.155 (3) for (I) and 0.092 (7) for (II). The apical Cu-Cl bond length is 2.852 (1) A for (I) and 2.971 (2) A for (II). The basal Cu-Cl and Cu-N average bonds lengths are 2.2673 (9) and 2.030 (2) A, respectively, for (I), and 2.280 (2) and 2.038 (6) A for (II). The molecules of (I) are linked by one C-H...Cl hydrogen bond into a complex [10 1] sheet. The molecules of (II) are linked by one C-H...Cl and one N-H...O hydrogen bond into a complex [100] sheet.