Abstract 1) In ethanol and in water the progressive blue shifts of the 260 mμ band of nitrobenzene for the nitro compounds are observed in the order of increasing number of nitro groups. 2) Only TNB shows visible weak absorption bands in acetone. 3) In an aqueous solution of sodium hydroxide these nitro compounds show intense absorption bands at longer wavelengths as the number of nitro group increases.
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Takehiro Abe (1958) studied this question.
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