Crystal structures of two dimeric nickel diphenylacetate complexes

In the crystal structures of the title compounds, namely μ-aqua-κ2 O:O-di-μ-diphenylacetato-κ4 O:O′-bis[(diphenylacetato-κO)bis(pyridine-κN)nickel(II)], [Ni2(C14H11O2)4(C5H5N)4(H2O)] (1) and μ-aqua-κ2 O:O-di-μ-diphenylacetato-κ4 O:O′-bis[(2,2′-bipyridine-κ2 N,N′)(diphenylacetato-κO)nickel(II)]–acetonitrile–diphenylacetic acid (1/2.5/1), [Ni2(C14H11O2)4(C10H8N2)2(H2O)]·2.5CH3CN·C14H12O2 (2), the complex units are stabilized by a variety of intra- and intermolecular hydrogen bonds, as well as C—H...π and π–π contacts between the aromatic systems of the pyridine, dipyridyl and diphenylacetate ligands. Despite the fact that the diphenylacetate ligand is sterically bulky, this does not interfere with the formation of the described aqua-bridged dimeric core, even with a 2,2′-bipyridine ligand, which has a strong chelating effect.

Crystal structure, molecular packing, FMO, NBO, nonlinear optical and optical limiting properties of an organic imidazolium diphenylacetate diphenylacetic acid single crystal

A new organic nonlinear optical material, imidazolium diphenylacetate diphenylacetic acid, with excellent structural characterization and nonlinear optical activity has been reported.

Zeolite Encapsulated Fe-poprhyrin for Catalytic Oxidation with Iodobenzene Diacetate (PhI(OAc)2)

<em>meso</em>-Tetrakis(3-pyridyl)porphyrinatoiron(III) chloride encapsulated on NaY Zeolite [Fe(T-3-PyP)@NaY] was synthesized as a heterogeneous “ship-in-a-bottle” type catalyst and characterized by Fourier transform infrared (FT-IR), atomic absorption (AA), diffused reflectance UV-Vis (DR UV-Vis), X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The catalytic activity of Fe(T-3-PyP)@NaY was examined for the epoxidation of cyclohexene by PhI(OAc)₂ in CH₃CN/H₂O (5:1) and compared to that of Fe(T-3-PyP) as a homogenous catalyst. We found that the heterogeneous catalyst Fe(T-3-PyP)@NaY was stable and reusable for several times, and provided a mild condition and exhibited high activity and selectivity in the oxidation of alkenes to epoxides(16-94%). As representative examples for the use of Fe(T-3-PyP)@NaY/ PhI(OAc)₂ in organic oxidations, oxidation of 4-nitrobenzylalcohol to 4-nitrobenzaldehyde (97 %), oxidative dehydrogenation of diethyl 4-(2,6-dichlorophenyl)-2,6-dimethyl- 1,4-dihydro-3,5-pyridinedicarboxylate to the corresponding pyridine (100 %), diphenylacetic acid to benzophenone (64 %) was achieved.

Investigation on Spectroscopic, Thermal and Antimicrobial Activity of Newly Synthesized Binuclear Cr(III) Metal Ion Complex

Binuclear Cr(III) metal ion complex was synthesized using diphenylacetic acid as primary ligand and 2-methyl pyridine (2-picoline) as secondary ligand. The synthesized complex was characterized by conductivity, FTIR, UV-Vis spectroscopy, magnetic moment and thermogravimetric analysis (TGA). FTIR spectra indicated the coordination of deprotonated diphenylacetic acid and 2-picoline through nitrogen and oxygen. The presence of water molecules inside the coordination sphere of the complex was confirmed from IR spectrum and TGA analysis. Binuclear and octahedral structure of the Cr(III) complex confirmed by TGA, UV-Vis spectroscopy and magnetic moment measurement. The complex showed moderate antibacterial activity with no antifungal activity.