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Structure of the allyl group. In organic chemistry, an allyl group is a substituent with the structural formula −CH 2 −HC=CH 2. It consists of a methylene bridge (−CH 2 −) attached to a vinyl group (−CH=CH 2). [1] [2] The name is derived from the scientific name for garlic, Allium sativum.
In allyl compounds, where the next carbon is saturated but substituted once, allylic rearrangement and related reactions are observed. Allyl Grignard reagents (organomagnesiums) can attack with the vinyl end first. If next to an electron-withdrawing group, conjugate addition (Michael addition) can occur.
Allyl- and vinylsilanes react with a variety of electrophiles under conditions of nucleophilic catalysis or Lewis acid promotion (often stoichiometric). The primary advantage of using Lewis acids versus fluoride catalysis is site selectivity—fluoride activation tends to generate allyl anions, which can then react at either the α or γ position.
General structure of a vinyl halide, where X is a halogen and R is a variable group. In organic chemistry, a vinyl halide is a compound with the formula CH 2 =CHX (X = halide). The term vinyl is often used to describe any alkenyl group. For this reason, alkenyl halides with the formula RCH=CHX are sometimes called vinyl halides.
Vinyl cation, a type of carbocation Vinyl group , a broad class of organic molecules in chemistry Vinyl polymer , a group of polymers derived from vinyl monomers
The Differences Between Vinyl Flooring and Laminate Flooring Appearance. While both vinyl and laminate flooring are designed to simulate natural wood, they do produce slightly different final effects.
You’ve finally decided it’s time to revamp your living room’s rickety, haggard floors. As you embark on your search for “the best wooden floors,” you’re...
A solution of a carbonyl compound is added to a Grignard reagent. (See gallery) An example of a Grignard reaction (R 2 or R 3 could be hydrogen). The Grignard reaction (French:) is an organometallic chemical reaction in which, according to the classical definition, carbon alkyl, allyl, vinyl, or aryl magnesium halides (Grignard reagent) are added to the carbonyl groups of either an aldehyde or ...