Synthesis and Spectral Characterization of Copper(II) and Zinc(II) Complexes of An Acylhydrazone

Copper(II) and zinc(II) complexes have been synthesized by the reaction of copper(II) acetate and zinc(II) acetate with an acylhydrazone and sodium cyanate and characterized by analytical and spectral studies

2-(3-Eth­oxy-2-hy­droxy­benz­ylidene)-N-phenyl­hydrazinecarboxamide

The title compound, C16H17N3O3, exists in the E configuration with respect to the azomethine double bond. The mol­ecule is close to planar, with a dihedral angle of 6.7 (1)° between the aromatic rings. The phenolic O atom functions as donor and acceptor by forming intramolec­ular O—H⋯O and inter­molecular N—H⋯O hydrogen bonds, respectively. Two-dimensional packing is fashioned through an inter­molecular hydrogen bonding network in an offset manner

Crystal structure of 8-[7, 8-bis(4-chlorobenzoyl)-7H-cyclopenta[a]acenaphthylen-9-yl]naphthalene-1-carboxylic acid

JPJ and CK are obliged to Dr S. Prathapan for introducing them to the field of domino reactions. SAIF (STIC) CUSAT, Kochi, India, provided spectroscopic, analytical and single crystal X-ray diffraction data.Peer reviewedPublisher PD

Synthesis and Spectral Aspects of Mixed Ligand Cadmium (II) Chelates of an ONS Donor Thiosemicarbazone

Cadmium(II) complexes have been synthesized by the reaction of cadmium(II) acetate with an ONS donor thiosemicarbazone and heterocyclic bases like 1,10- phenanthroline, 2,2’ -bipyridine as coligands. They were physico-chemically characterized by CHNS analyses, conductivity measurements, infrared and electronic spectral studies

Bis{μ-2-[bis­(pyridin-2-yl)methyl­idene]hydrazinecarbothio­amidato}bis­[bromido­copper(II)] methanol disolvate

In the centrosymmetric binuclear title compound, [Cu2Br2(C12H10N5S)2]·2CH3OH, the CuII ion adopts a slightly dis­torted square-pyramidal coordination geometry. The hydrazine carbothio­amide moiety and one of the pyridyl rings together adopt an almost planar arrangement, with a maximum deviation of 0.052 (4) Å for the C atom of the thio­urea moiety. There are two mol­ecules of methanol solvent per complex in the asymmetric unit. The nonconventional intra­molecular C—H⋯Br hydrogen bonds make the mol­ecule more rigid, whereas the conventional N—H⋯N and O—H⋯Br inter­molecular hydrogen-bonding inter­actions, supported with N—H⋯π inter­actions, establish a supra­molecular linkage among the mol­ecules in the crystal. An intermolecular C—H⋯O inter­action is also present

N′-[(E)-Furan-2-yl­methyl­idene]pyridine-3-carbohydrazide

The title compound, C11H9N3O2, exists in the E conformation with respect to the azomethane C=N bond, and has the keto form. There are two independent mol­ecules in the asymmetric unit and each of these features a slight slanting of the pyridine and furan rings, which form a dihedral angle of 14.96 (10)° in one of the mol­ecules and 5.53 (10)° in the other. The crystal structure is stabilized by N—H⋯O and N—H⋯N hydrogen bonds, weak C—H⋯O and C—H⋯N hydrogen bonds and C—H⋯π inter­actions and π–π inter­actions [shortest centroid–centroid distance = 3.7864 (15) Å]

(E)-2-(4-Benz­yloxy-2-hy­droxy­benzyl­idene)-N-phenyl­hydrazinecarbothio­amide

The title compound, C21H19N3O2S, exists in the thione form. The configuration about the C=N bond is E. The hydrazinecarbothio­amide unit adopts an almost planar arrangement, with maximum deviations of 0.016 (3) and −0.016 (2) Å for the two thio­urea N atoms. An intra­molecular O—H⋯N hydrogen bond occurs. Weak inter­molecular N—H⋯S, C—H⋯O and C—H⋯π inter­actions are observed in the crystal structure

N′-[(E)-4-Benz­yloxy-2-hy­droxy­benzyl­idene]-4-nitro­benzohydrazide monohydrate

The title compound, C21H17N3O5·H2O, exists in the keto form with an E conformation with respect to the azomethine double bond. The twist angles between the aromatic rings are in the range 4.67 (10)–17.54 (10)°. A water mol­ecule of solvation is present in the lattice. A conventional intra­molecular O—H⋯N hydrogen bond increases the rigidity of the mol­ecule. Inter­molecular O—H⋯O, N—H⋯O and C—H⋯O hydrogen-bonding inter­actions establish a supra­molecular linkage among the mol­ecules in the crystal structure. There are also C—H⋯π inter­actions present

(Z)-N,N-Dimethyl-2-[phen­yl(pyridin-2-yl)methyl­idene]hydrazinecarbothio­amide

The title compound, C15H16N4S, exists in the Z conformation with the thionyl S atom lying cis to the azomethine N atom. The shortening of the N—N distance [1.3697 (17) Å] is due to extensive delocalization with the pyridine ring. The hydrazine–carbothio­amide unit is almost planar, with a maximum deviation of 0.013 (2) Å for the amide N atom. The stability of this conformation is favoured by the formation of an intra­molecular N—H⋯N hydrogen bond. The packing of the mol­ecules involves no classical inter­molecular hydrogen-bonding inter­actions; however, a C—H⋯π inter­action occurs