Spectral characteristics and electrical structure of coumarine’s synthetics derivatives. P a r t II. Investigating of UV-spectra of dicoumarin and ethylbiscoumacetatum (neodicoumarine)
Abstract
Investigated UV-spectrums of dycoumarine and ethylbiscoumacetatum in solvents of different polarity. Identified types of electrical transferring, which causes the appearance of the spectra of the test substances. On the curve of the absorption spectrums of 4-oxycoumarine’s derivatives (Dycoumarine’s and Ethylbiscoumacetatum’s) exhibits two absorption bands in the range 276–291 and 310–314 nm; first line has type 1Lb frequently exhibits vibration structure in low-polarity solvents (cyclohexan, dyoxan, chloroform), and more characteristic of the second band corresponds to p→π-pairing of benzene and pyran-2 cycles.
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