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The general chemical equation for the hydration of alkenes is the following: RRC=CH 2 + H 2 O → RRC(OH)-CH 3. A hydroxyl group (OH −) attaches to one carbon of the double bond, and a proton (H +) adds to the other. The reaction is highly exothermic. In the first step, the alkene acts as a nucleophile and attacks the proton, following ...
The final elimination of oxaphosphetanes 4a and 4b yield (E)-alkene 5 and (Z)-alkene 6, with the by-product being a dialkyl-phosphate. The mechanism of the Horner-Wadsworth-Emmons reaction The ratio of alkene isomers 5 and 6 is not dependent upon the stereochemical outcome of the initial carbanion addition and upon the ability of the ...
The Woodward cis-hydroxylation (also known as the Woodward reaction) is the chemical reaction of alkenes with iodine and silver acetate in wet acetic acid to form cis-diols. [1] [2] (conversion of olefin into cis-diol) The reaction is named after its discoverer, Robert Burns Woodward. The Woodward cis-hydroxylation
This net reaction can also be described as follows: [PdCl 4] 2 − + C 2 H 4 + H 2 O → CH 3 CHO + Pd + 2 HCl + 2 Cl −. This conversion is followed by reactions that regenerate the Pd(II) catalyst: Pd + 2 CuCl 2 + 2 Cl − → [PdCl 4] 2− + 2 CuCl 2 CuCl + 1 / 2 O 2 + 2 HCl → 2 CuCl 2 + H 2 O. Only the alkene and oxygen are consumed.
Cyclization reactions, or intramolecular addition reactions, can be used to form cycloalkenes. These reactions primarily form cyclopentenones, a cycloalkene that contains two functional groups: the cyclopentene and a ketone group. [12] However, other cycloalkenes, such as Cyclooctatetraene, can be formed as a result of this reaction. [11]
The hydrosilylation reaction can be initiated with UV light at room temperature or with heat (typical reaction temperature 120-200 °C), under moisture- and oxygen-free conditions. [7] The resulting monolayer, which is stable and inert, inhibits oxidation of the base silicon layer, relevant to various device applications.
a Diels-Alder reaction. Alkenes add to dienes to give cyclohexenes. This conversion is an example of a Diels-Alder reaction. Such reaction proceed with retention of stereochemistry. The rates are sensitive to electron-withdrawing or electron-donating substituents. When irradiated by UV-light, alkenes dimerize to give cyclobutanes. [20]
The Prins reaction is an organic reaction consisting of an electrophilic addition of an aldehyde or ketone to an alkene or alkyne followed by capture of a nucleophile or elimination of an H + ion. [ 1 ] [ 2 ] [ 3 ] The outcome of the reaction depends on reaction conditions.
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