Immobilised Co(II) Homodinuclear Coordinative Compound with Terephthalate and o-phenanthroline as Ligands: Synthesis, Crystal Structure and Applications

Homodinuclear coordinative compound of Co(II) with terephthalate bridge and o-phenanthroline has been synthesized and characterized by elemental analysis, FT-IR spectroscopy, thermal analysis. The crystal structure was determined by single crystal X–ray diffraction technique. The coordinative compound was immobilized into functionalized silica with thiol groups and tested for its catalytic activity towards styrene oxidation in the presence of H2O2. A conversion of 89.75 % and selectivity of 85.4 % for benzaldehyde formation was obtained. This work is licensed under a Creative Commons Attribution 4.0 International License

N,N′-(1,4-Phenyl­ene)bis­(4-chloro­butanamide)

The title mol­ecule, C14H18Cl2N2O2, lies on a crystallographic inversion center and the each 4-chloro­butanamide group adopts an anti-staggered conformation. In the crystal, adjacent mol­ecules are linked through N—H⋯O contacts, forming infinite ribbons extending parallel to the a axis

Synthesis and X-ray Characterisation of a New Mixed-valence Trinuclear Iron Cluster

This paper reports on the synthesis of a new trinuclear homometalic mixed-valent iron carboxylate cluster with furan-2-carboxylic acid. The complex with the formula [Fe2IIIFeIIO(C4H3OCOO)6(H2O)3]∙0.5CH3CN•2.25H2O was characterized by X-ray analysis that revealed that the compound crystalizes in the triclinic centrosymmetric group P-1, with the following unit cell parameters: a = 10.2758(6)Å, b = 11.5991(9) Å, c = 19.7349(15) Å, α = 105.060(7)°, β = 94.216(6)°, γ = 101.662(6)°

Crystal structure of 3-(4-bromophenyl)-5-methyl-1 H -pyrazole, C 10 H 9 BrN 2

C10H9BrN2, orthorhombic, P212121 (no. 19), a = 5.9070(3) Å, b = 9.2731(7) Å, c = 17.5641(14) Å, V = 962.09(12) Å3 , Z = 4, Rgt(F) = 0.0504, wRref(F2 ) = 0.0947, T = 293(2) K

Mononuclear Cu(II) complexes of novel salicylidene Schiff bases: synthesis and mesogenic properties

Two new Schiff base ligands 1 and 2 (where 1 = 4-(2-hydroxybenzilidenamino)-phenyl-4-(decyloxy)-2-(pent-4-enyloxy)benzoate, 2 = 4-(4-(decyloxy)-2-hydroxybenziliden amino)-phenyl-4-(decyloxy)-2-(pent-4-enyloxy)benzoate) and their copper (Cu)(II) complexes have been synthesised and characterised. The derivatives were fully characterised structurally, and their mesomorphic behaviour was investigated by polarised optical microscopyand differential scanning calorimetry. The structure of Cu(II) complex having 1 as ligand (3) was determined by X-ray diffraction. The Schiff base ligands exhibit enantiotropic nematic phases, the Cu(II) complex 4 shows monotropic nematic phase behaviour, while compound 3 does not show mesomorphism

1-[(E)-4-(Phenyl­diazen­yl)phen­yl]-3-pyrroline-2,5-dione

The title compound, C16H11N3O2, displays a trans configuration with respect to the azo group. The mol­ecule is non-planar; the maleimide ring forms a dihedral angle of 42.35 (4)° with the benzene ring bonded to its N atom and the mean plane of this benzene ring is rotated by 21.46 (8)° with respect to the azo group mean plane, which, in turn, forms a dihedral angle of 24.48 (7)° with the ‘terminal’ benzene ring. Mol­ecules in the crystal are π–π stacked along the [100] direction with a mean inter­planar distance of 3.857 (1) Å. In addition, C—H⋯O inter­actions link them into double layers parallel to the ac plane

Hexa­kis­(1H-imidazole-κN 3)iron(II) sulfate–1H-imidazole (1/2)

The asymmetric unit of the title compound, [Fe(C3H4N2)6]SO4·2C3H4N2, contains two complex cations, two sulfate anions and four imidazole mol­ecules. In both cations, the FeII atom is coordinated by six monodentate imidazole ligands and exhibits a slightly distorted octa­hedral coordination geometry. The Fe—N distances [2.184 (4)–2.218 (4) Å] point to a high-spin state of the Fe2+ ions. N—H⋯O hydrogen bonds between the ionic components generate a three-dimensional framework containing corrugated channels along [001], which are filled by N—H⋯N hydrogen-bonded imidazole chains

Reaction of non-symmetric schiff base metallo-ligand complexes possessing an oxime function with Ln ions

The preparation of non-symmetric Schiff base ligands possessing one oxime function that is associated to a second function such as pyrrole or phenol function is first described. These ligands, which possess inner N4 or N3O coordination sites, allow formation of cationic or neutral non-symmetric CuII or NiII metallo-ligand complexes under their mono- or di-deprotonated forms. In presence of Lanthanide ions the neutral complexes do not coordinate to the LnIII ions, the oxygen atom of the oxime function being only hydrogen-bonded to a water molecule that is linked to the LnIII ion. This surprising behavior allows for the isolation of LnIII ions by non-interacting metal complexes. Reaction of cationic NiII complexes possessing a protonated oxime function with LnIII ions leads to the formation of original and dianionic (Gd(NO3)5)2− entities that are well separated from each other. This work highlights the preparation of well isolated mononuclear LnIII entities into a matrix of diamagnetic metal complexes. These new complexes complete our previous work dealing with the complexing ability of the oxime function toward Lanthanide ions. It could open the way to the synthesis of new entities with interesting properties, such as single-ion magnets for exampl