70 research outputs found
Synthesis, Characterization, and Biological Activity of N1-Methyl-2-(1H-1,2,3-Benzotriazol-1-y1)-3-Oxobutan- ethioamide Complexes with Some Divalent Metal (II) Ions
A new series of Zn2+, Cu2+, Ni2+, and Co2+ complexes of N1-methyl-2-(1H-1,2,3-benzotriazol-1-yl)-3-oxobutanethioamide (MBOBT), HL, has been synthesized and characterized by different spectral and magnetic measurements and elemental analysis. IR spectral data indicates that (MBOBT) exists only in the thione form in the solid state while 13C NMR spectrum indicates its existence in thione and thiole tautomeric forms. The IR spectra of all complexes indicate that (MBOBT) acts as a monobasic bidentate ligand coordinating to the metal(II) ions via the keto-oxygen and thiolato-sulphur atoms. The electronic spectral studies showed that (MBOBT) bonded to all metal ions through sulphur and nitrogen atoms based on the positions and intensity of their charge transfer bands. Furthermore, the spectra reflect four coordinate tetrahedral zinc(II), tetragonally distorted copper(II), square planar nickel(II), and cobalt(II) complexes. Thermal decomposition study of the complexes was monitored by TG and DTG analyses under N2 atmosphere. The decomposition course and steps were analyzed and the activation parameters of the nonisothermal decomposition are determined. The isolated metal chelates have been screened for their antimicrobial activities and the findings have been reported and discussed in relation to their structures
(E)-N′-(4-Hydroxybenzylidene)-3-nitrobenzohydrazide
The molecule of the title compound, C14H11N3O4, assumes an E conformation about the C=N double bond. The benzene rings form a dihedral angle of 3.9 (2)°. The crystal structure is stabilized by N—H⋯O, O—H⋯N, O—H⋯O and C—H⋯O hydrogen bonds, forming layers parallel to (101). In addition, intralayer π–π stacking interactions [centroid–centroid distance = 3.635 (2) Å] are observed
N′-[(2-Methoxynaphthalen-1-yl)methylidene]-4-methylbenzohydrazide
In the title compound, C20H18N2O2, the mean planes of the naphthyl system and the benzene ring form a dihedral angle of 88.48 (10)°. In the crystal, N—H⋯O hydrogen bonds link the molecules into C(4) chains, which propagate along the b-axis direction
2-Fluoro-N′-[(2-hydroxynaphthalen-1-yl)methylidene]benzohydrazide
In the title molecule, C18H13FN2O2, the hydroxy group is involved in an intramolecular O—H⋯N hydrogen bond. The naphthyl ring system and the benzene ring form a dihedral angle of 31.0 (2)°. In the crystal, N—H⋯O hydrogen bonds link the molecules into chains propagating in [101]
ChemInform Abstract: Synthesis and Characterization of Copper(II) Metal(II) Binuclear Complexes of N,N′-Bis(8-hydroxyquinoline-7-carboxaldene)-1,3-diaminopropane.
ChemInform Abstract: Metal Chelates of Heterocyclic Nitrogen-Containing Ketones. Part 11. Copper(II) Complexes of Syn-2-picolyl Phenyl and Syn-2-picolyl Methyl Ketoximes.
ChemInform Abstract: Metal Chelates of Heterocyclic Nitrogen-containing Ketones. Part 19. Some Acetato- and Nitrato-Copper(II) Complexes of Phenyl-2-picolyl Ketone Hydrazone and Phenyl-2-picolyl Ketone Phenyl Hydrazone.
ChemInform Abstract: Metal Chelates of Heterocyclic Nitrogen-containing Ketones. Part 20. Temperature Dependence of Magnetic Susceptibility and ESR Spectra of the Halogeno-Copper(II) Complexes (I) and (II) of Phenyl-2-picolyl Ketone Hydrazone and Phenyl H
ChemInform Abstract: Complexing Ability of Some γ-Lactone Derivatives. Thermal, Magnetic and Spectral Studies on Cobalt(II), Nickel(II) and Copper(II) Complexes and Their Base Adducts.
Potential anti‐fouling agents: metal complexes of 3‐(2‐furylidene)hydrazino‐5,6‐diphenyl‐1,2,4‐triazine
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