Synthesis, Structural Characterization, Hirshfeld Surface Analysis, and Antibacterial Study of Pd(II) and Ni(II) Schiff Base Complexes Derived from Aliphatic Diamine.

A Schiff base bearing two methyl substituents, namely, 6,6'-((1,1')-((2,2-dimethylpropane-1,3-diyl) bis(azanylylidene)) bis(methanylylidene)) bis(2-methylphenol) [HAD1Me] was synthesized and characterized through physicochemical and spectroscopic analyses. Then, the Schiff base was complexed with Pd(II) and Ni(II) to form [Pd(AD1Me)] and [Ni(AD1Me)], respectively. Both metal complexes were successfully obtained and characterized through several analyses, .

Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction.

Electrochemical hydrogen evolution reaction (HER) refers to the process of generating hydrogen by splitting water molecules with applied external voltage on the active catalysts. HER reaction in the acidic medium can be studied by different mechanisms such as Volmer reaction (adsorption), Heyrovsky reaction (electrochemical desorption) or Tafel reaction (recombination). In this paper, facile hydrothermal methods are utilized to synthesis a high-performance metal-inorganic composite electrocatalyst, consisting of platinum nanoparticles (Pt) and molybdenum disulfide nanosheets (MoS) with different platinum loading.

Synthesis, characterization, quantum chemical calculations and anticancer activity of a Schiff base NNOO chelate ligand and Pd(II) complex.

This paper reports the synthesis, characterization, anticancer screening and quantum chemical calculation of a tetradentate Schiff base 2,2'-((1E,1'E)-((2,2-dimethylpropane-1,3-diyl)bis- (azanylylidene))bis(methanylylidene))bis(4-fluorophenol) (L2F) and its Pd (II) complex (PdL2F). The compounds were characterized via UV-Visible, NMR, IR spectroscopy and single crystal x-ray diffraction. Density Functional Theory (DFT) and time-dependent DFT calculations in gas and solvent phases were carried out using B3LYP, B3P86, CAM-B3LYP and PBE0 hybrid functionals combined with LanL2DZ basis set.

Cytotoxicity, alpha-glucosidase inhibition and molecular docking studies of hydroxamic acid chromium(III) complexes.

Hydroxamic acids [R(CO)N(OH)R'] are flexible compounds for organic and inorganic analyses due to their frailer structures compared to the carboxylic acid. The syntheses and characterization of benzohydroxamic acid (BHA), its CH-, OCH-, Cl- para-substituted derivatives and their Cr(III) complexes are reported herein. The metal complexes were synthesized by reacting the hydroxamic acids with chromium(III) chloride hexahydrate in 2:1 molar ratio.

Crystal structure of bis-(2-{1-[(E)-(4-fluoro-benz-yl)imino]-eth-yl}phenolato-κ(2) N,O)palladium(II).

The asymmetric unit of the title complex, [Pd(C15H13FNO)2], contains one half of the mol-ecule with the Pd(II) cation lying on an inversion centre and is coordinated by the bidentate Schiff base anion. The geometry around the cationic Pd(II) centre is distorted square planar, chelated by the imine N- and phenolate O-donor atoms of the two Schiff base ligands. The N- and O-donor atoms of the two ligands are mutually trans, with Pd-N and Pd-O bond lengths of 2.

Crystal structure of bis-{2-[(E)-(4-fluoro-benz-yl)imino-meth-yl]phenolato-κ(2) N,O}nickel(II).

The asymmetric unit of the title complex, [Ni(C14H11FNO)2], contains one-half of the mol-ecule with the Ni(II) cation lying on an inversion centre coordinated by a bidentate Schiff base anion. The cationic Ni(II) center is in a distorted square-planar coordination environment chelated by the imine N and phenolate O donor atoms of the two Schiff base ligands. The N and O donor atoms of the two ligands are mutually trans with Ni-N and Ni-O bond lengths of 1.

Bis{2-meth-oxy-6-[(E)-(4-methyl-benz-yl)imino-meth-yl]phenolato}palladium(II) chloro-form monosolvate.

In the title complex, [Pd(C16H16NO2)2]·CHCl3, the Pd(II) cation lies on an inversion center. One Cl atom of the CHCl3 solvent mol-ecule lies on a twofold axis and the C-H group is disordered with equal occupancies about this axis with the other Cl atom in a general position with full occupancy. The Pd(II) cation is four-coordinate and adopts a square-planar geometry via coordination of the imine N and phenolic O atoms of the two bidentate Schiff base anions.

Crystal structure of bis-{2-[(E)-(4-meth-oxy-lbenz-yl)imino-meth-yl]phenolato-κ(2) N,O (1)}nickel(II).

The asymmetric unit of the title compound, [Ni(C15H14NO2)2], comprises an Ni(II) cation, lying on an inversion centre, and a Schiff base anion that acts as a bidentate ligand. The Ni(II) cation is in a square-planar coordination environment binding to the imine N and phenolate O atoms of the two Schiff base ligands. The N- and O-donor atoms of the two ligands are mutually trans, with Ni-N and Ni-O bond lengths of 1.

6,6'-Dimeth-oxy-2,2'-[(E,E')-(2,4,6-trimethyl-1,3-phenyl-ene)bis-(nitrilo-methanylyl-idene)]diphenol chloro-form monosolvate.

In the title compound, C(25)H(26)N(2)O(4)·CHCl(3), the aromatic rings of the imino-methyl-6-meth-oxy-phenol fragments make dihedral angles of 58.33 (6) and 87.74 (6)° with the central benzene ring.

Bis{2-[(E)-(4-fluoro-benz-yl)imino-meth-yl]-6-meth-oxy-phenolato-κN,O}nickel(II).

In the title compound, [Ni(C(15)H(13)FNO(2))(2)], the Ni(II) atom is tetra-coordinated by two N atoms and two O atoms from two 2-[(4-fluoro-benz-yl)imino-meth-yl]-6-meth-oxy-phenolate ligands in a square-planar geometry. The two N atoms and two O atoms around the Ni(II) atom are trans to each other, as the Ni(II) atom lies on an inversion centre. In the fluoro-phenyl group, five C atoms and an F atom are disordered over two sets of positions of equal occupancy.

2-[(E)-(2,4-Dihy-droxy-benzyl-idene)aza-nium-yl]-3-phenyl-propano-ate.

The title compound, C(16)H(15)NO(4), exists as a zwitterion in the solid state, with the carb-oxy-lic acid group being deprotonated and the imine N atom being protonated. The mol-ecule adopts an E configuration about the C=N double bond. The dihedral angle between the benzene rings is 46.

Bis{2-[(E)-(4-fluoro-benz-yl)imino-meth-yl]-6-meth-oxy-phenolato}palladium(II).

In the title compound, [Pd(C(15)H(13)FNO(2))(2)], the Pd(II) atom is tetra-coordinated by two N atoms and two O atoms from the two 2-[(4-fluoro-benz-yl)imino-meth-yl]-6-meth-oxy-phen-oxy ligands, forming a square-planar geometry. The two N atoms and the two O atoms around the Pd(II) atom are trans to each other. The dihedral angle between the two fluoro-substituted benzene rings is 39.

Bis{2-[1-(benzyl-imino)-eth-yl]phenolato}palladium(II).

In the title compound, [Pd(C(15)H(14)NO)(2)], the Pd atom lies on an inversion center and is coordinated by two ligand mol-ecules through the O and N atoms in a bidentate manner, forming a slightly distorted square-planar geometry. The dihedral angle between the two benzene rings in the ligand is 76.53 (19)°.

(E)-2-[1-(3-Amino-4-chloro-phenyl-imino)eth-yl]-4-bromo-phenol.

The title Schiff base compound, C(14)H(12)BrClN(2)O, exists in an E configuration with respect to the central C=N double bond. The amino group adopts a pyramidal configuration. The dihedral angle between the two benzene rings is 76.

6,6'-Dimeth-oxy-2,2'-[(E,E')-(4-chloro-m-phenyl-ene)bis-(nitrilo-methyl-idyne)]diphenol.

The title compound, C(22)H(19)ClN(2)O(4), has the appearance of a warped butterfly. One 2-hydr-oxy-3-methoxy-benzyl-idene-amino fragment is planar [with a maximum deviation of 0.056 (3) Å] and forms a dihedral angle of 9.