nitro group

American  

noun

Chemistry.

1. the univalent group –NO 2 .

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Etymology

Origin of nitro group

First recorded in 1885–90

Example Sentences

Production of anilines—key intermediates for the fine chemical, agrochemical, and pharmaceutical industries—relies on precious metal catalysts that selectively hydrogenate aryl nitro groups in the presence of other easily reducible functionalities.

From Science Magazine

Hence the positions occupied by the nitro groups in the two different nitrobrombenzoic acids must be symmetrical with respect to the carboxyl group.

From Project Gutenberg

Somewhat later, they found that it could be prepared from diazobenzene imide, provided a nitro group were present in the ortho or para position to the diazo group.

From Project Gutenberg

When treated with nitric acid in the usual way it takes up like the others three nitro groups and so becomes tri-nitro-toluol.

From Project Gutenberg

The presence of nitro groups in a substance increases the difficulty of further nitration, and in any case not more than three nitro groups can be introduced into an aromatic compound, or the phenols.

From Project Gutenberg