Antimicrobial activity of some thiourea derivatives and their nickel and copper complexes

Chloridobis(ethane-1,2-diamine)(4-methyl-aniline)cobalt(III) dichloride monohydrate

In the title compound, [CoCl(C(2)H(8)N(2))(2)(C(7)H(9)N)]Cl(2)·H(2)O, the Co(III) ion has a distorted octa-hedral coordination environment and is surrounded by four N atoms in an equatorial plane, with the other N and Cl atoms occupying the axial positions. The crystal packing is stabilized by N-H⋯O, N-H⋯Cl and O-H⋯Cl inter-actions.

Ultrasound promoted synthesis of bis(substituted pyrazol-4-ylcarbonyl)-substituted thioureas

A series of novel bis(substituted pyrazol-4-ylcarbonyl)-substituted thioureas have been synthesized by the reactions of substituted pyrazol-4-ylcarbonyl isothiocyanates with different diamines under ultrasound irradiation and classical heating method at 20-25 °C. In general, substantial improvement in rates and modest yields increases were observed when reactions were carried out under sonication, compared with the classical heating method. The structures of these compounds have been elucidated by elemental and spectral (IR, ¹H-NMR) analysis.

Synthesis and characterization of N-(Arylcarbamothioyl)-cyclohexanecarboxamide derivatives: the crystal structure of N-(naphthalen-1-ylcarbamothioyl)cyclohexanecarboxamide

A number of N-(arylcarbamothioyl)cyclohexanecarboxamide derivatives (aryl substituents: phenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, o-tolyl, p-tolyl, 3-methoxyphenyl, 4-methoxyphenyl and naphthalen-1yl) have been synthesized. The compounds obtained were characterized by elemental analyses, IR spectroscopy and ¹H-NMR spectroscopy. N-(naphthalen-1-ylcarbamothioyl)cyclohexanecarboxamide, H₂L⁹, was also characterized by a single crystal X-ray diffraction study. This compound, C₁₈H₂₀N₂OS, crystallizes in the triclinic space group Pī, with Z = 2, and unit cell parameters a = 6.9921(14) Å, b = 11.002(2) Å, c = 12.381(3) Å, α = 113.28(3)°, β = 99.38(3)°, and γ = 101.85(3)°. The cyclohexane ring adopts a chair conformation. The molecular conformation of the compound is stabilized by an intramolecular (N2-H2•••O1) hydrogen bond which forms a pseudo-six-membered ring.

Synthesis and Antibacterial Study of Aspirin-Chalcone Derivatives

The chemistry of aspirin and chalcone derivatives has been extensively studied and developed as one of thepharmaceutically important molecules. In this study, new aspirin-chalcone derivatives have been successfullysynthesized and characterized via FTIR, 1H and 13C NMR spectroscopy. The antibacterial activities ofsynthesized compounds were investigated towards Escherichia coli ATCC 8739 via turbidimetric kineticmethod. The newly synthesized aspirin-chalcone derivatives, however showed poor antibacterial activityagainst E. coli ATCC 8739 at the concentration of 50, 80 and 100 ppm. The effect of the molecular structureof the synthesized compounds on the antibacterial activity is discussed.