N′-(2-Hy­droxy-1,2-diphenyl­ethyl­idene)benzohydrazide

In the title compound, C21H18N2O2, the amino group is involved in an intra­molecular N—H⋯O hydrogen bond. The rings make dihedral angles of 37.9 (2), 64.4 (2) and 83.6 (2)°. In the crystal, inter­molecular O—H⋯N and O—H⋯O hydrogen bonds link the mol­ecules into chains running along [100]

(E)-N′-[(2-Hydroxy-1-naphthyl)methyl­ene]benzohydrazide monohydrate

In the title compound, C18H14N2O2·H2O, the dihedral angle between the benzene ring and the naphthalene system is 5.18 (10)°. Intra­molecular N—H⋯O hydrogen bonds influence the molecular conformation. In the crystal, inter­molecular N—H⋯O and O—H⋯O hydrogen bonds are observed as well as π–π inter­actions between the phenyl ring and the substituted ring of the naphthalene [centroid–centroid distance = 3.676 (11) Å]

(E)-N′-[1-(4-Bromo­phen­yl)ethyl­idene]benzohydrazide

The asymmetric unit of the title compound, C15H13BrN2O, contains two independent mol­ecules with different conformations; the two aromatic rings form dihedral angles of 32.4 (4) and 27.5 (4)° in the two mol­ecules. In the crystal structure, inter­molecular N—H⋯O hydrogen bonds link mol­ecules into chains propagating in [100]

N′-(2,4-Dichloro­benzyl­idene)-3-methoxy­benzohydrazide

There are two independent mol­ecules in the asymmetric unit of the title compound, C15H12Cl2N2O2. The dihedral angle between the two benzene rings is 27.6 (4)° in one mol­ecule and 16.4 (4)° in the other. Both mol­ecules adopt an E configuration about the C=N bonds. In the crystal structure, mol­ecules are linked through inter­molecular N—H⋯O hydrogen bonds, forming chains in the a-axis direction

4-Hydr­oxy-N′-(3,5-dichloro-2-hydroxy­benzyl­idene)benzohydrazide

In the title compound, C14H10Cl2N2O3, the dihedral angle between the two benzene rings is 5.1 (2)°. The mol­ecule adopts an E configuration with respect to the C=N bond and an intra­molecular O—H⋯N inter­action is present. In the crystal structure, mol­ecules are linked through inter­molecular N—H⋯O and O—H⋯O hydrogen bonds

1-[4-(Diamino­methyl­eneamino­sulfon­yl)phenyl­iminiometh­yl]-2-naphtholate N,N-dimethyl­formamide disolvate

The asymmetric unit the title compound, C18H16N4O3S·2C3H7NO, contains a mol­ecule in a zwitterionic form with a deprotonated hydroxyl group and an iminium group, and two dimethyl­formamide solvent mol­ecules. The dihedral angles of the guanidine group and the naphthyl ring system with respect to the central benzene ring are 76.04 (7) and 3.45 (9)°, respectively. The conformation of the mol­ecule may be influenced, in part, by two intra­molecular hydrogen bonds, while in the crystal structure, inter­molecular hydrogen bonds form one-dimensional chains along [010]

Synthesis of some schiff bases, Zinc(II) and Copper (II) Complexes derived from 1, 2-Diaminocyclo Hexane

No Abstrac

Synthetic and antibacterial studies of Schiff base complexes derived from 2,3-diaminopyridine and <i>o</i>-vanillin

999-1003Two new Schiff bases (1a and 2a) and eight transition metal complexes (1b-1d and 2b-2f) derived from 2,3-diaminopyridine (DAPY) and ortho-vanillin (Val H) have been synthesised and characterised by elemental analyses, magnetic susceptibility measurements, IR and NMR spectra. The Schiff bases and most of the metal complexes display antibacterial activity