nitro group

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nitro group,

in chemistry, functional groupfunctional group,
in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part. Organic compounds are frequently classified according to the functional group or groups they contain.
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 that consists of a nitrogen atom joined to two oxygen atoms. Compounds that contain a nitro group, e.g., picric acid and trinitrotoluene (TNT), are called nitro compounds; many nitro compounds are unstable and are used as explosives. As a result of the chemical bonding in the nitro group, the nitrogen atom is positively charged and each oxygen atom has a partial negative charge. For this reason the nitro group has a powerful attraction for electrons. Many of the chemical reactions of nitro compounds are due to this electronegativityelectronegativity
, in chemistry, tendency for an atom to attract a pair of electrons that it shares with another atom (see chemical bond). For example, the molecule hydrogen chloride, HCl, consists of a hydrogen atom, H, and a chlorine atom, Cl, sharing a pair of electrons.
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 of the nitro group.
References in periodicals archive ?
Comparative study of results reflected that the improvement in antifungal activities of chalcones may be achieved by incorporating hydroxyl and other electron releasing groups at proper positions in the aromatic rings and avoiding nitro group substitution.
This increase is a result of the added polar interactions between the nitro groups and the larger size of the nitrated benzene ring.
Apparently a nitro group at C-4' made compound most active in the series.
This key factor as well as the crucial role of nitro group in secnidazole was our major focus throughout the synthetic work.
Therefore biphenyl compound 1 has higher dipole moment compared to 2, which contains hydroxyl at the same position instead of carboxylate, however the orientation of the hydroxyl group is in the plane of biphenyl core instead of the orientation of the nitro group (coming out of the plane) (Fig.
1,3-Disubstituted ureas 1-21 having nitro group showed a diversified antiglycation activity when compared to standard drug rutin (IC50 = 294.
Nitro group attached to a benzene ring acts as a very strong lewis base due to high electron density on oxygen and t e electron withdrawing inductive and resonance effect of nitro group [24].