alkyl group


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to alkyl group: alkylation

alkyl group

(ăl`kĭl), in chemistry, group of carbon and hydrogen atoms derived from an alkanealkane
, any of a group of aliphatic hydrocarbons whose molecules contain only single bonds (see chemical bond). Alkanes have the general chemical formula CnH2n+2.
..... Click the link for more information.
 molecule by removing one hydrogen atom (see radicalradical,
in chemistry, group of atoms that are joined together in some particular spatial structure and that take part in most chemical reactions as a single unit. Important inorganic radicals include ammonium, NH4; carbonate, CO3 ; chlorate, ClO3
..... Click the link for more information.
). The name of the alkyl group is derived from the name of its alkane by replacing the -ane suffix with -yl, e.g., methyl, CH3, from methane, CH4, and ethyl, C2H5, from ethane, C2H6. In some cases different alkyl groups can be formed from the same alkane by removing different hydrogen atoms; the alkyl groups are then distinguished by adding a prefix, e.g., 1-propyl or n-propyl, CH2CH2CH3, and 2-propyl or isopropyl, CH(CH3)2, both formed from propane, CH3CH2CH3. When a 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.
..... Click the link for more information.
 is joined with an alkyl group, replacing the hydrogen that was removed, a compound is formed whose characteristics depend largely on the functional group.
References in periodicals archive ?
Siliconates can be thought of as "silane salts," where a metal replaces one or more of the alkyl groups attached to oxygen.
The grafted alkyl group density was calculated based on the carboxyl group density (Table 1) and the grafting reaction efficiency (Table 2).
This is attributed to the order of electron deficiency in polymer chain or the order of inductive effect of the pendant alkyl group.
In addition, a signal assigned to a silicon atom in which one bond is connected to the alkyl group, [(Si--O).
Cabot Corporation has received a patent for a pigment composition comprised of at least one pigment and at least one dispersant composition comprised of at least one anionic surfactant and at least one polymer comprised of at least one salt of a carboxylic acid group, wherein the pigment is a modified carbon product comprised of a carbon product having attached at least one organic group, and wherein the organic group is comprised of at least one aromatic group or at least one C1-C12 alkyl group and further it is comprised of at least one anionic group or salts thereof.
a] is an alkyl group of 1 to 12 carbon atoms; Ar is a substituted or unsubstituted aromatic group; q is an integer of 1 to 4; t and c are each independently 0 or 1; and x, y and z are each independently integers of 1 to 3, inclusive, with the proviso that t is 1 when L is a heteroatom group.
Comprising 50-80% is a composition selected from the group consisting of a random copolymer of propylene with 7-40% by weight of a CH2_CHR alkene, where R is an alkyl group containing from 2 to 6 carbon atoms, and from 0.
Osaka, Japan, have patented a process for producing an alkyl-substituted hydroquinone with a compound including hydrogen atoms and/or a straight or branched chain alkyl group.
BASF Corporation has been granted a patent for a method of making a curable coating composition containing a carbamate functional reactive additive, providing a compound comprising at least one epoxy group and at least one branched alkyl group of from five to 30 carbon atoms, reacting the compound with carbon dioxide so as to produce a carbonate functional compound, reacting said carbonate functional compound with ammonia so as to produce a carbamate functional reactive additive, and incorporating the carbamate functional reactive additive into a curable coating composition.
The use of DEM-M having a C = C group afforded merely a microcomposite, probably because of the lack of a bulky alkyl group.
wherein R is a linear alkyl group or a branched alkyl group having 1 to 18 carbons), based on 100 parts by weight of a rubber component.