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Yadav, M.
- Synthesis and Characterization of Molybdenum and Tungsten Complexes of N-Nicotinoyl-N'-2-Thiophenethiocarbohydrazide
Authors
1 Department of Applied Chemistry, ISM Dhanbad-826004, IN
2 Department of Chemistry, SDJ PG College, Azamgarh, UP, IN
Source
Asian Journal of Research in Chemistry, Vol 5, No 1 (2012), Pagination: 79-82Abstract
Molybdenum and tungsten complexes of the type M2O4L2(H2O)2, where M = Mo(V), W(V), LH = N-nicotinoyl-N'-2- thiophenethiocarbohydrazide (H2NTTH), have been synthesized and characterized by using elemental analysis, magnetic susceptibility measurements, infrared spectra, 1HNMR, 13CNMR,ESR.and X-ray spectroscopic studies. Molar conductance measurements in DMF show non-ionic behaviour of all the complexes. Magnetic susceptibility measurements indicate diamagnetic nature of the complexes. Although the complexes are ESR inactive, +V oxidation state of metal ions in octahedral geometry has been suggested on the basis of electronic spectral studies. IR and electronic spectral studies indicate dinuclear - type of complexes with M2O4 2+ moiety. IR spectral data suggest monoanionic bidentate mode of bonding for the ligand. The 1H NMR and 13C NMR spectra are found to be in good agreement with the proposed stoichiometry. X-ray powder diffraction of the complexes exhibit amorphous nature of the complexes.
Keywords
Molybdenum, Tungsten, Thiocarbohydrazide Complexes.- Corrosion Inhibitors for Acidization of Petroleum Oil Well
Authors
1 Department of Applied Chemistry, ISM, Dhanbad-826004, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 9 (2011), Pagination: 1404-1407Abstract
An important method of protecting metallic materials against deterioration due to corrosion is by the use of corrosion inhibitors. In the present investigation, corrosion inhibition study of two imidazoline derivatives, 1-(2-hydroxy ethyl)-2-methylimidazoline (Inh I) and 1-(2-hydroxyethyl)-2-decylimidazoline (Inh II)) have been performed for oil-well tubular steel (N-80) in 15% HCl using weight loss, electrochemical polarization and SEM techniques. The inhibition efficiencies of the inhibitors follow the sequence, Inh II > Inh I. The results showed that inhibition efficiency of both the inhibitors increased with increase in inhibitors concentration. Both inhibitors act as mixed inhibitors and obey the Langmuir adsorption isotherm. Corrosion inhibition mechanism take place through adsorption phenomenon.Keywords
Imidazoline Derivatives, N80 Steel, 15% HCl, Corrosion Inhibition.- Inhibition of Corrosion of Copper by 4-Amino-3-Phenyl-5-Mercapto-1, 2, 4-Triazole in 3.5% Sodium Chloride Solution
Authors
1 Department of Applied Chemistry, ISM University, Dhanbad, IN
2 Department of Chemistry, S.N. PG College, Azamgarh, IN