A new binucleating ligand, 1,3-bis(1,5,9-triazacyclododec-1-yl)-propan-2-ol (L-OH), was synthesized, and a binuclear Zn(II) complex has been prepared and characterized by X-ray crystallography. Three nitrogen atoms of each [12]aneN₃ moiety of L-O^- are coordinated to each zinc atom, and an oxygen atom of the 2-hydroxypropyl linker bridges two zinc atoms. A water molecule is trapped between two Zn(II) ions with an O(H₂O)-Zn distance of 2.582 Å.

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The ligand (N₂C₁₃H₁₄) bridges Zn(II) atoms to form a one-dimensional chain compound, and two chloro ligands are also coordinated to Zn(II) atoms. The coordination geometry of the Zn atom is distorted tetrahedral with a Cl-Zn-Cl angle of 125.69(3)°. The crystal packing is consolidated by both intra- and inter-chain C-H…Cl interactions.

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The title compound, [C₄₈H₆₀N₆O₁₀Ni₂Mn], crystallizes in the monoclinic space group P2₁/c with cell parameters a=10.965(2)Å, b=17.838(4)Å, c=13.951(3)Å, β=112.800(10)°, V=2515.5(9)ų, Z=2. The structure was refined to a final R value of 0.0508 for 2414 reflections [I>2σ(I)]. The manganes atom is in an octahedral environment by four oxygen atoms and two acetato oxygen atoms. The phenolic oxygen ions and acetate ions of the two organic ligands coordinate both Ni and Mn atoms, forming a μ-bridge.

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The crystal structure of (pydaH)[Sb(pydc)₂]·3H₂O·0.5CHCl₃, as a self-associated complex containing LH₂, has been determined by the X-ray diffraction method. The crystal system is triclinic with space group P1 and four molecules per unit cell. The unit cell parameters are a = 9.328(2)Å, b = 13.476(3)Å, c = 20.343(4)Å with α = 87.49(3)°, β = 86.69(3)° and γ = 75.96(3)°. The final R value is 0.0464 for 11647 measured reflections. In this compound the Sb atom is attached to two (pydc)^2- groups. Each of the two complexes gathers together via hydrogen bonds of two counter cations. The deformation of the structure supports the activation of the lone pair on antimony(III).

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The X-ray crystal structure of the antimalarial bis{N-(pyrrolo[1,2-a]quinoxalin-4-yl)-3-aminopropyl}piperazine was established. It crystallizes in the monoclinic space group P2₁/c. Solid-state data could be used to enlighten the mechanism of action, implicating the binding of this new antimalarial bispyrroloquinoxaline to β-hematin.

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The structure of tris(diethylthiourea)bromosilver(I), [Ag(detu)₃Br], is in a triclinic system space group P1 with the cell parameters a = 9.2072(7), b = 12.8854(10), c = 13.1900(10)Å, α = 63.5210(10), β = 71.8110(10), γ = 76.571(2)°, Z = 2, D_x = 1.467 g/cm³, V = 1322.70(18)ų and T = 293 K. The structure was refined to the final R1 = 0.0524 using all 5386 observed reflections. The complex is monomeric covalent with Ag atom bonded to three detu molecules and one Br atom. The geometry around Ag atom is tetrahedral.

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The title compound was prepared by the lithiation of N-methyl-ortho-toluamide and the alkylation of the resultant lithio derivative with desoxy benzoin, followed by alkaline hydrolysis. The compound crystallizes into monoclinic space group P2₁/a with unit-cell parameters a = 12.689(8), b = 14.681(13), c = 18.114(4)Å, β = 91.37(3)°, Z = 8. The crystal structure was solved by direct methods and refined to R = 0.0455 for 3566 observed reflections. There are two crystallographically independent molecules in the asymmetric unit having different conformations of the attached phenyl and benzyl substituent to the iso-coumarin nucleus. In both molecules, the heterocyclic ring adopts a half-chair conformation. The C-H…O type of intermolecular hydrogen bonds and C-H…π weak interactions stabilize the molecules in the unit cell in addition to the π-π interactions.

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C₁₄H₁₄O₅, contains four molecules in the monoclinic unit cell. The coumarin moiety forms a dimmer structure by π-π interaction around the inversion centre. The distance between two coumarins is 3.4241(3)Å. The structure is stabilized by one intramolecular and five intermolecular hydrogen-bonding interactions.

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The compound 2-(3-pyridyl)-3-(4-methyl phenyl)-1,3-thiazolidin-4-one has been synthesized. The compound crystallizes in the monoclinic system with space group P2₁/c; the cell parameters are a = 14.505(1)Å, b = 8.024(1)Å, c = 12.032(2)Å, Z = 4, V = 1392.2(3)Å.³ The final residual factor is R1 = 0.0695. The compound exhibits intermolecular hydrogen bonds of type C-H…N and C-H…O.

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The crystal structure of o-aminobenzoylhydrazide was determined by X-ray diffraction analysis. The compound crystallizes in the orthorhombic system, space group Pca2₁, with cell parameters of a = 23.058(6)Å, b = 6.3563(18)Å, c = 5.0670(4)Å and Z = 4. The final residual factor is 0.0538. The intramolecular and intermolecular hydrogen bonds of the type N-H…O and N-H…N were observed in the structure.

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