| Summary: | Three new 4-methoxybenzoylthiourea derivatives namely N-phenyl-N’-4-methoxybenzoylthiourea (A), N-(2-methoxy-phenyl)-N’-4-methoxybenzoylthiourea (B) and N-(2-nitrophenyl)-N’-4-methoxybenzoylthiourea (C) has successfully synthesized and characterized by elemental analysis, Fourier Transform Infrared (FTIR), proton (1H) and carbon (13C) Nuclear Magnetic Resonance (NMR) spectroscopy. Result obtained for IR showed the presence of important bands of the compounds such as ν(N-H), ν(C=O), ν(C-N) and ν(C=S) which were observed at 3200 cm-1, 1670 cm-1, 1200 cm-1 and 700 cm-1, respectively. The 1H chemical shifts for CONH and CSNH had been observed around 9 ppm and 12 ppm, respectively. For the 13C resonance, the signal of C=O and C=S had been observed at 180 ppm and 200 ppm, respectively. The efficiency of the synthesized compounds was investigated as corrosion inhibitor of mild steel in 1.0 M H2SO4 by using linear polarization resistance (LPR) technique. © 2016, Malaysian Society of Analytical Sciences. All rights reserved.
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