In an effort to develop new antibacterial drugs, some novel bisindolylmethane derivatives containing Schiff base moieties were prepared and screened for their antibacterial activity. The synthesis of the bisindolylmethane Schiff base derivatives 3-26 was carried out in three steps. First, the nitro group of 3,3'-((4-nitrophenyl)-methylene)bis(1H-indole) (1) was reduced to give the amino substit...

The title compound, C(28)H(20)N(2)O(2)·2H(2)O, comprises a Schiff base mol-ecule with an imposed inversion centre in the middle of p-phenyl-enediamine unit and water mol-ecules of crystallization. In the structure, the Schiff base mol-ecule is present as the keto-amino tautomer with a strong intra-molecular N-H⋯O hydrogen bond. The Schiff base mol-ecules and water mol-ecules of crystallization ...

Lewis acid catalyzed isomerization of glucose to fructose is an important reaction for production renewable chemicals. Here, we show the synthesis active and selective catalyst this by controlling Sn dispersion on SBA15. loading 1 wt. % over SBA15 (Sn/SBA15) maximized formation tetrahedral species surface. Increasing or changing support caused SnO2 clusters which reduced selectivity. A mechanis...

A novel Schiff base was synthesized by the reaction of piperonal and anthranilic acid, which was further utilized in the synthesis of five novel complexes by reaction with different metal salts ultrasonically. Time for the reaction was greatly reduced through ultrasound irradiations and the yield of reactions was also high as compared to the conventional methods using reflux conditions. The...

The synthesis, characterization and biological activity of Cu(II) and Ni(II) complexes derived from tridentate Schiff base ligand 3-hydroxy-4-(pyridine-2-yl methylene amino) benzoic acid (HL) was obtained by the condensation of 2-Pyridine carboxaldehyde with 4-amino 3-hydroxy benzoic acid has been described. The complexes were characterized based on elemental analyses, molar conductivity measur...

The Schiff base molecule of the title compound, C(14)H(12)N(4)O(6)·C(5)H(5)N, was obtained from the condensation reaction of 2-hy-droxy-3-meth-oxy-benzaldehyde and 2,4-dinitro-phenyl-hydrazine. The C=N bond of the Schiff base has a trans arrangement and the dihedral angle between the two benzene rings is 3.49 (10)°. An intra-molecular N-H⋯O hydrogen bond generates an S(6) ring. In the crystal, ...

In the title dinuclear complex, [CuGd(C(20)H(22)N(2)O(4))(NO(3))(3)], the Cu(II) ion is located in the inner N(2)O(2) cavity of the Schiff base ligand and adopts a distorted square-planar geometry. The Gd(III) ion is ten-coordinate being bound to ten O atoms, four from the Schiff base ligand and six from three bidentate nitrate anions. The Cu(II) and Gd(III) ions are linked by two phenolate O a...

Reactions of MnX(2) meltsalt (X = Cl and ClO(4)) and a quinquedentate Schiff base ligand together with its coligand azides in MeOH produced the unprecedented assembly of novel octa- and hexadecanuclear manganese clusters containing two and four alternant tetrahedral Mn(III)(3)Mn(II) cores bridged by Schiff base ligands and versatile azides groups. The magnetic measurements on both compounds ind...