Anagrammes & Informations sur | Mot Anglaise ALKYL

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Exemples d’utilisation de ALKYL dans une phrase

• The alkyl group (the amyl in this case) is unreactive and the chemical and biological properties are mainly due to the nitrite group.
• The haloalkanes (also known as halogenoalkanes or alkyl halides) are alkanes containing one or more halogen substituents.
• In organic chemistry, the acyl group (IUPAC name alkanoyl if the organyl group is alkyl) is usually derived from a carboxylic acid, in which case it has the formula , where R represents an organyl group or hydrogen.
• The Pinner reaction refers to the acid catalysed reaction of a nitrile with an alcohol to form an imino ester salt (alkyl imidate salt); this is sometimes referred to as a Pinner salt.
• Silane with alkyl groups are effective water repellents for mineral surfaces such as concrete and masonry.
• Hughes and Sir Christopher Ingold studied nucleophilic substitution reactions of alkyl halides and related compounds.
• The reaction involves a carbocation intermediate and is commonly seen in reactions of secondary or tertiary alkyl halides under strongly basic conditions or, under strongly acidic conditions, with secondary or tertiary alcohols.
• The rule states that with the addition of a protic acid HX or other polar reagent to an asymmetric alkene, the acid hydrogen (H) or electropositive part gets attached to the carbon with more hydrogen substituents, and the halide (X) group or electronegative part gets attached to the carbon with more alkyl substituents.
• Alkylation is the addition of alkyl groups to molecules, often by alkylating agents such as alkyl halides.
• This reaction suffers from the disadvantage that the product is more nucleophilic than the reactant because alkyl groups are activators for the Friedel–Crafts reaction.
• When the alkylating agent is a small alkyl halide, such as methyl chloride or methyl bromide, the viologen salt is often water-soluble.
• The alkyl group may be transferred as an alkyl carbocation, a free radical, a carbanion, or a carbene (or their equivalents).
• ADBACs are a mixture of alkylbenzyldimethylammonium chlorides, in which the alkyl group has various even-numbered alkyl chain lengths.
• As a consequence, localized alkyl, alkenyl/aryl, and alkynyl carbanions assume trigonal pyramidal, bent, and linear geometries, respectively.
• For S2 reactions, alkyl alcohols can also be converted to alkyl tosylates, often through addition of tosyl chloride.
• R for any alkyl group or even any organyl group (Alk can be used to unambiguously indicate an alkyl group).
• The general formula for such an acyl halide can be written RCOX, where R may be, for example, an alkyl group, CO is the carbonyl group, and X represents the halide, such as chloride.
• In organic chemistry, butyl is a four-carbon alkyl radical or substituent group with general chemical formula , derived from either of the two isomers (n-butane and isobutane) of butane.
• Grignard hypothesized that the aldehyde or ketone prevented the magnesium from reacting with the alkyl halide, accounting for the low yields.
• The general chemical structure of a paraben is shown at the top right of this page, where R symbolizes an alkyl group such as methyl, ethyl, propyl or butyl.
• Alkyl nitrates (principally 2-ethylhexyl nitrate) and di-tert-butyl peroxide are used as additives to raise the cetane number.
• In organic chemistry, organophosphates (also known as phosphate esters, or OPEs) are a class of organophosphorus compounds with the general structure , a central phosphate molecule with alkyl or aromatic substituents.
• Markovnikov's rule predicts that the hydrogen atom is added to the carbon of the alkene functional group which has the greater number of hydrogen atoms (fewer alkyl substituents).
• Many alkyl amines are produced industrially by the amination of alcohols using ammonia in the presence of solid acid catalysts.
• He is well known by organic chemists for the Wurtz reaction, to form carbon-carbon bonds by reacting alkyl halides with sodium, and for his discoveries of ethylamine, ethylene glycol, and the aldol reaction.

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