The structure of bis(2-methoxy-6-((Z)-(p-tolylimino)methyl)phenoxy)palladium crystallized in a monoclinic system and was characterized thus: P21/c, a = 13.0221(14), b = 11.6615(13), c = 8.4898(9)Å, β = 97.327(4)°, Z = 2, V = 1278.7(2)Å3. The crystal structure was solved by direct methods and refined by full-matrix least-squares on F2 to final values of R1 = 0.0349 [I > 2σ(I)] and wR2 = 0.0824. The molecules have two-fold symmetry about the centre Pd1 atom. Two ligands were coordinated to the Pd1 atom via oxygen and nitrogen atoms in a bidentate manner to form a square-planar geometrical structure.

Two diazine Schiff base ligands, HLa and HLb, derived from thiocarbohydrazide and salicylaldehyde derivatives were synthesized using the microwave-assisted synthesis approach. The confirmation of both ligands was elucidated through physiochemical and spectroscopy techniques as well as single X-ray crystallography diffraction. The analyses showed that the ligands synthesized were formed as azine instead of thiocarbohydrazone based on the missing thione, C=S moiety, throughout FTIR and NMR spectrascopic data. This finding was further concluded by X-ray crystal analysis. The biological properties of these ligands were screened using the disc diffusion method. The result shows that HLb shows significant inhibition towards all of the bacteria tested.

Three compounds of benzoylthiourea derivatives namely: 1-(4-chlorobenzoyl)-3-(4-fluorophenyl)thiourea (T1), 1-(4-chlorobenzoyl)-3-(3-chloro-2-fluorophenyl)thiourea (T2), and 1-(4-chlorobenzoyl)-3-(6-chloro-2-fluoro-3- methoxyphenyl)thiourea (T3), were successfully synthesized and characterized via micro elemental analyser, Fourier Transform Infra Red (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy methods. From the FTIR spectral data, the compounds are common to have the vibration frequency of stretching of v(N�H) around 3500�3100 cm?1, v(C=O) around 1660�1720 cm?1, v(C=S) around 680�1440 cm?1 and v(C=N) in the range 1350�1000 cm?1. The inhibition property of the resulted compound on the corrosion of mild steel in 1.0 M hydrochloric acid has been investigated at room temperature using weight loss measurement and linear polarization resistance technique. The inhibition efficiency obtained from both methods are in good agreement with one another. It was found that the inhibition efficiency increases with inhibitor concentration and maximum efficiency was obtained at 0.0004 M. Among the studied inhibitors, T3 shows the best inhibition efficiency of greater than 90%. The potentiodynamic study also reveals that the compounds studied acts essentially as mixed type inhibitor. � 2017 American Scientific Publishers All rights reserved.