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A univalent group, such as ethyl or propyl, having the general formula CnH2n+1.

[German Alkohol, alcohol (from Medieval Latin alcohol, antimony; see alcohol) + -yl.]


1. (Elements & Compounds) (modifier) of, consisting of, or containing the monovalent group CnH2n+1: alkyl group or radical.
2. (Elements & Compounds) an organometallic compound, such as tetraethyl lead, containing an alkyl group bound to a metal atom
[C19: from German, from Alk(ohol) alcohol + -yl]


(ˈæl kəl)
any of a series of univalent groups having the general formula CnH2n + 1, as methyl or ethyl.
[1880–85; < German, =Alk(ohol) alcohol + -yl -yl]
al•kyl′ic (-ˈkɪl ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.alkyl - any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
ethyl, ethyl group, ethyl radical - the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom
methyl, methyl group, methyl radical - the univalent radical CH3- derived from methane
References in periodicals archive ?
Quotations are invited for Supply of 0303166 Teepol like detergent & weting agent/ Equivalent Synthetic Detergent in liquid form based on the Sodium Salt of secondary alkyl sulphate.
Product name/Attributes: Arkopal Series octyl and nonyl phenol ethoxylates; Sapogenat Series triisobutyl phenol ethoxylates; Emulsogen LCN series APE-free surfactants; Genapol LA Series lauryl alcohol ethoxylates and coconut alcohol ethoxylates; Genapol T Series tallow-based ethoxylates; Genapol UD Series APE-free surfactants; Genapol X series tridecyl ethoxylates and APEG-free alternatives; Genapol PF series EO/PO block copolymers; Emulsogen R series reactives; Emulsogen RAL series reactives; Hostapur SAS series secondary alkyl sulfonates; Hostapal BV conc universal dispersant and wetting agent for pigment preparations; Dispersogen 1728 universal dispersant and wetting agent for pigment preparations; Dispersogen 2774 univeral dispersant and wetting agent for pigment preparations.
Currently, most of the metal-mediated reactions involve allylation or propargylation, and more recently, secondary alkyl halides.