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.
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References in periodicals archive ?
As such, here we present a computational study of the structure, vibrational frequencies, and thermodynamics of boroxine with one, two, and three nitro groups.
The geometry of the nitro groups in the dinitrobenzene isomers has been explored before.
It is proposed that the two hnc ligands are coordinated to the metal ion via the deprotonated hydroxo moiety and an oxygen atom of the nitro group [9, 17, 18, 60, 61].
The localized positive charge of chiral ionic liquids 1 can effectively interact with the nitro group of Michael acceptor.
Results of the anticancer activity of chalcones at 10 [micro]M concentration revealed that nitro substitution at p-position of ring A increased the cell inhibition tendency of chalcone up to 100% as compared to the references chosen which seemed surprising as some compounds containing nitro group are supposed to exhibit carcinogenic and mutagenic behavior.
This is reasonable since the electron-withdrawing nitro group should pull away some of Ol's lone pair electron density into the [pi] system of the phenyl ring.
This increase is a result of the added polar interactions between the nitro groups and the larger size of the nitrated benzene ring.
Next, the nitro group is reduced to the corresponding amine.
It can be seen from the figure that this fraction contain alcohol, nitro group, amides, amines, and that for chloroform is given in Figure-6.
Compound 1, with nitro group installed at C-4', was found to be the most active analog having the IC50 value of 35.8 0.1 uM against the standard, pentamidine (IC50 = 5.09 0.09 uM).