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Alkyl group

univalent group derived from alkanes by removal of a hydrogen atom from any carbon atom –CₙH₂ₙ₊₁

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 16, 2026
Entity authorityQ335268
Source-derived summary

In organic chemistry, an alkyl group is an alkane missing one hydrogen atom.

The term alkyl is intentionally unspecific to include many possible substitutions.

An acyclic alkyl has the general formula of −CnH2n+1. A cycloalkyl group is derived from a cycloalkane by removal of a hydrogen atom from a ring and has the general formula −CnH2n−1.

Typically an alkyl is a part of a larger molecule. In structural formulae, the symbol R is used to designate a generic (unspecified) alkyl group. The smallest alkyl group is methyl, with the formula −CH3.

Related concepts

Alkylation is the addition of alkyl groups to molecules, often by alkylating agents such as alkyl halides.

Alkylating antineoplastic agents are a class of compounds that are used to treat cancer. In such case, the term alkyl is used loosely.

Editorial summary

The public source identifies “Alkyl group” as univalent group derived from alkanes by removal of a hydrogen atom from any carbon atom –CₙH₂ₙ₊₁. This brief keeps that definition visible, then builds a research path around Alkyl, group and univalent.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current 133-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Alkyl, group and univalent providing the first useful test.
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A short description can identify a subject without explaining its stakes. For “Alkyl group”, the useful work is to connect “univalent group derived from alkanes by removal of a hydrogen atom from any carbon atom –CₙH₂ₙ₊₁” to the records capable of establishing context and consequence.

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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 16, 2026. The linked authority identifier is Q335268. None of the 0 selected statements returned an explicit reference.

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This entry incorporates text from Alkyl group” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.