33630-03-4Relevant academic research and scientific papers
Synthesis, structures, spectral properties and DFT quantum chemical calculations of (E)-4-(((4-propylphenyl)imino)methyl)phenol and (E)-4-((2-tolylimino)methyl)phenol; their corrosion inhibition studies of mild steel in aqueous HCl
Elemike, Elias E.,Nwankwo, Henry U.,Onwudiwe, Damian C.,Hosten, Eric C.
, p. 12 - 22 (2017)
Two Schiff base compounds with similar backbone, but different positions and lengths of alkyl groups, (E)-4-(((4-propylphenyl)imino)methyl)phenol (PMP) and (E)-4-((2-tolylimino)methyl)phenol (TMP) have been synthesized. Their structures were established by spectroscopic techniques which include FTIR, 1H and 13C NMR, relative molecular mass (mass spect.), and single crystal X-ray crystallography. The spectroscopic methods revealed the characteristic imine functional groups and the exact molecular masses of the compounds. Single crystal analysis revealed an orthorhombic crystal system with Pca21 space group for the two compounds; and the structure of PMP reveal that the propyl group is disordered over two positions in 0.79:0.21 ratio. The corrosion inhibition behaviour of the two Schiff bases were studied by electrochemical measurements. The results suggest that the two derivatives adsorbed onto the mild steel surface and formed hydrophobic films, which to an appreciable extent, protected the surface of the mild steel. Potentiodynamic polarization results strongly suggested that the investigated Schiff bases behave as mixed-type inhibitors with a more pronounced cathodic nature, and the adsorption isotherm basically obeys the Langmuir isotherm. Quantum chemical computations were also employed to provide further explanations on the adsorption mode, and the theoretical predictions conformed to the experimental results.
Schiff bases of toluidines: Synthesis and effect of position of methyl group on biological potential
Rai, Mangat,Khera, Vandana,Kaul,Sharma
, p. 208 - 209 (2007/10/03)
Condensation of 2-toluidine and 3-toluidine with benzaldebyde and substituted benzaldehydes (1-8) resulted in the formation benzal-2-toluidines (1a-Sa) and benzal-3-toluidines (1b-8b) respectively. The products were identified on the basis of elemental analysis and spectral studies and screened in vitro for their antifungal potential against three phytopathogenic fungi and two nematodes.
Preparation and characterization of chromophor group containing cyclotriphosphazenes: I imino chromophor carrying some cyclotriphosphazenes
Odabasoglu, Mustafa,Turgut, Guenseli,Karaer, Hatice
, p. 9 - 25 (2007/10/03)
Some new substituted cyclotriphosphazenes were prepared by the reaction of hexachlorocyclotriphophazene and 4-hydroxy or 4′-hydroxy Schiff bases as 4′-hydroxybenzylideneaniline, 4′-hydroxy-4-chlorobenzylideneaniline, 4′-hydroxy-2-chlorobenzylidenaniline, 4′-hydroxyfurfurylidenaniline, 4-hydroxybenzylidene-2′-methylaniline, 4-hydroxybenzylidene-2′,6′-dimethylaniline, 4-hydroxybenzylidene-2′-chloroaniline, 4-hydroxybenzylidene-4′-tert-butylaniline, 4′-hydroxybenzylidene-3,4-15-Crown-5-aniline. The structure of compounds with a general formula [NP(OC6H4CH=N-Ar)2]3, or [NP(OC6H4N=CH-Ar)2]3, was determined by IR, UV, 1H-NMR and elemental analysis. IR spectra of all compounds showed four characteristic bands located at 1633-1601cm-1, 1242-1150cm-1, 1278-1261cm-1 and 958-943cm-1, respectively, corresponding to CH=N, P=N, P-N-P (asymmetric) and P-N-P (symmetric) vibrations. Charasterictic UV bands, named as Band I, Band II, Band III and Band IV located at 346-308nm, 294-271nm, 262-216nm and 240-210nm respectively, are due to electronic transitions. The 1H-NMR spectra of 4-hydroxyfurfurylidene and the phosphazene derivative shows cis-trans izomerization below 305°K and 295°K.
