Abstract

The electronic absorption spectra of some hydroxamic acid oxime derivatives and Schiff's base derivatives in polar (ethanol) and nonpolar (CCl₄) solvents, as well as in some other organic solvents of different polarities, were investigated; the variation of absorbance with pH was utilized for the determination of pK_a and Δ<i>G</i>* values. The important bands in the IR spectra as well as the main signals of the NMR spectra are also discussed in relation to the molecular structure.

Some Rules of Spectral Structure*

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Structural and optical properties of nano-SiO₂ derived from the husk of some rice varieties and the effect of doping with Sm³⁺ ions

C. Mbakaan, I. Ahemen, F. B. Dejene, A. D. Onojah, S. J. Motloung, R. Ocaya, and A. Reyes-Rojas
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Some Spectral Characteristics of Mercury Arcs for Use in Study of the Raman Effect*

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Synthesis and nonlinear optical properties of 4-phenylethylene derivatives based on a large π conjugated structure

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