الفهرس 
Analytical studies on maleanilinic acid and its derivatives via their reactions with some inorganic and organic reagents
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Abstract
the present work novel N-maleanilinic acids derivatives were prepared by solvent; which free reaction between maleic anhydride and aniline derivatives at room temperature in a good yield. They were investigated using Elemental Analysis (EA), FT-IR, thermal analyses (TA) measurements (TGA/DTG and DTA) in comparison with mass spectral (MS) fragmentation at 70 eV.The results were obtained correlated with the theoretical data of MOC{u2019}s by DFT-B3LYP method and HF with 6- 311++G (d, p)basis set with 6-311G(d) basis set, respectively to confirm the proposed structures of derivatives.The crystallographic structures of studied compounds were investigated by X-ray diffraction (XRD).The spectrophotometric method has been developed through the reaction of derivatives with ninhydrin reagent; which successfully applied for the determination the percent purity of these compounds that confirmed by percent recovery. Also these derivatives can be used as selective chromogenic analytes for spectrophotometric analysis of heavy metal cations in water samples.Simple, accurate, precise, sensitive and pHselective visible spectrophotometric method had been developed and validated for the direct determination of iron (III) and chromium (III) in pure and/ or environmental samples.These selected indicators are successfully applied for the analysis of Fe (III) and Cr (III) in ground water samples collected from regional wells in El-Beheira governorate