amino group


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Related to amino group: Amino functional group

amino 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 attached by single bonds to hydrogen atoms, alkyl groupsalkyl group
, in chemistry, group of carbon and hydrogen atoms derived from an alkane molecule by removing one hydrogen atom (see radical). The name of the alkyl group is derived from the name of its alkane by replacing the -ane suffix with -yl, e.g.
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, aryl groupsaryl group
, in chemistry, group of atoms derived from benzene or from a benzene derivative by removing one hydrogen that is bonded to the benzene ring (see radical). The simplest aryl group is phenyl, C6H5 ; it is derived from benzene.
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, or a combination of these three. An organic compound that contains an amino group is called an amine. Amines are derivatives of the inorganic compound ammoniaammonia,
chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor.
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, NH3. When one, two, or all three of the hydrogens in ammonia are replaced by an alkyl or aryl group, the resulting compound is known as a primary, secondary, or tertiary amine, respectively. Like ammonia, the amines are weak bases because the unshared electron pair of the nitrogen atom can form a coordinate bond with a proton (see chemical bondchemical bond,
mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the formation of an aggregate with sufficient stability to be regarded as an
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). Amines will react with a mineral acid to form an amine salt, e.g., with hydrochloric acid to form an amine hydrochloride. A water-insoluble amine can be made to dissolve by adding acid to form its water-soluble amine salt. Amines react similarly with alkyl halides to form alkyl ammonium salts. Amines can be synthesized by reacting ammonia with an alkyl halide and neutralizing the resulting alkyl ammonium salt with an alkali, e.g., sodium hydroxide. This procedure yields a mixture of primary, secondary, and tertiary amines that is easily separated into its three components by fractional distillation. Amines can also be prepared by the reaction of ammonia with an alcohol or by the reduction of any of a variety of compounds containing nitrogen in a higher oxidation state. Amines take part in many kinds of chemical reactions; in particular, they can react with an acid chloride, acid anhydride, or ester to form an amide. All reactions of amines involve bonding of an electron-deficient atom to the amino nitrogen through its unshared electron pair. One of the most important amines is anilineaniline
, C6H5NH2, colorless, oily, basic liquid organic compound; chemically, a primary aromatic amine whose molecule is formed by replacing one hydrogen atom of a benzene molecule with an amino group.
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, an aromatic amine.

amino group

[ə′mē·nō ‚grüp]
(organic chemistry)
A functional group (-NH2) formed by the loss of a hydrogen atom from ammonia.
References in periodicals archive ?
This structure did not carry an amino group, because amine group has turned into an amide group within the polymeric structure.
Silk protein, such as QS/FGS are composed of chemically reactive amino groups, such as amino acids lysine, arginine and histidine, important source of promising tissue engineering cells.
As one would expect, the spacious arrangement of amino groups in ligand defines its denticity and structure of the internal sphere of complex.
The free amino group analysis indicated that GA and DPPA have the greatest ability to cross-link insoluble collagen fibrils.
The present work designed the crosslinking system based on the reaction between the ketone carbonyl group and the primary amino group in protein, which was just like the crosslinking reaction between acrylic resin containing an AAEM functional monomer unit and hexanediamine (18-21) shown in the reaction formula (a) of Fig.
Nasir-ud-din acknowledges financial support from Pakistan Academy of Sciences for amino group studies.
In this study the complex stability constants for Cu2+ Co2+ Cd2+ Ni2+ and Pb2+ cations with a 124-triazole ligand carrying naphthole amino group (Fig.
The epsilon amino group of lysine is involved and lysine can become unavailable as a nutrient.
Nine contributions by 16 international academics and researchers provide chemists with information about applications, detailing complex syntheses using the amino group as templates and modern techniques focusing on the introduction of the amino group.
Although both drugs are based on the transition state analog of sialic acid, zanamivir has a single substitution of a guanidinium group at the 4' position on the sugar ring, whereas oseltamivir has an amino group at the 4' position and, more importantly, a bulky hydrophobic pentyl ether group replacing the glycerol side chain at the 6' position.
Using tape, place the central carbon card on the upper chest, the hydrogen group on the forehead, the amino group on the right forearm, and the carboxyl group on the left forearm.
1-hydroxymethyl and 1,1-bishydroxymethyl groups or methylenes (methylene ethers), linked to the secondary or the tertiary amino group.