Miss Krishna Purohit, K. K. Desai, "2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II)", Journal of Chemistry, vol. 2, Article ID 825847, 4 pages, 2005. https://doi.org/10.1155/2005/825847
2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II)
2-Hydroxy-4-methoxybenzophenoneoxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of Cu(II). In pH 2.5-9.0 the reagent gives brown coloured precipitate with Cu(II). Spectrophotometric methods revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer's law is obeyed up to 31.75 ppm of Cu(II). Molar absorptivity and Sandell's sensitivity at 400 nm were found to be 7.0×102 L mol-1 cm-1 and 0.090 μg/cm2 respectively. The stability constant of Cu(II)-HMBO complex is found to be 6.13×109. Gibb’s free energy change for complex formation reaction was found to be -13.93 Kcal/mol. The reagent can be used for the analysis of brass.
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