alkyl group


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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.
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 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
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). 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.
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 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 ?
Combining this data with the fluorosilica (430 g/mol for alkyl group: C[H.sub.2]C[H.sub.2][C.sub.8][F.sub.17]), it can be surmised that higher molecular weight or more grafting coverage is not necessarily better for the AR properties.
This trend in ultrasonic degradation of poly(n-butyl methacrylate-co-alkyl acrylate) is attributed to the alkyl group interaction and large chain stretching of polymer.
Replacing the hydroxyl groups on the surface of silica particles with appropriate alkyl groups reportedly improved the silica dispersion in the rubber matrix and prevented the adsorption of curing agents.
1, for the preparation of organoclay were selected in order to investigate the effects of bulky alkyl groups, hydrogen bonding between hydroxyl groups of BHL and VER, and the reaction of VER with the unsaturated C = C groups of DEM and BHLV.
They found that the degree of polymerization of graft polymers was small for the graft polymerization of AN and propylene oxide onto PPTA, the degree of N-alkylation of PPTA was 90-100%, and the adhesion strength of PPTA for polyethylene, poly(methyl methacrylate), and ionomers increased by the introduction of long alkyl groups, carboxymethyl group or epoxy compounds.
These so-called coupling agents typically have the structure [R - Si - X.sub.3] where R is an alkyl group and X is hydrolyzable (e.g.
In 1941, Bayer patented an alkylaryl-paraphenylene diamine with a cyclohexanone alkyl group for use as an oxidation inhibitor.
In the formula (1), M is a metal atom, R is a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms or an alkynyl group having 2 to 18 carbon atoms, and n is an integer of 1 or more.
Chain extender Chemical structure Joncryl[R] ADR 4300 R1-R6 are H, C[H.sub.3], a higher alkyl group, or combinations of them; R7 is an alkyl group and x, y, and z are all between 1 and 20.
This suggested that the inclusion complex made of [alpha]CD and MT was in a form covering the alkyl group of MT from the cavity of a wide edge of CD with respect to the alkyl group of the -CH (h) of MT.
Keeping all other units fixed and varying the alkyl group (R) from C[H.sub.3] to [C.sub.6][H.sub.13], we elucidated the effect of the different alkyl chain on the geometric, electronic, and optical properties of such dye for their use as sensitizers in solar cells.