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How hOCL is added into ethene ? give reason |
| Answer» EXPLANATION:echanism of electrophilic addition is used to explain the chlorohydrin formation reaction, or the addition of HO-Cl to ALKENES and alkynes. HO-Cl bond is polarized with a slight positive charge on the Chlorine atom and a slight negative charge on the oxygen atom of -OH. This sets up the chlorohydrin addition reaction, where the pi-electrons on the multiple bond act as the nucleophile (electron donor) and the Cl+ acts as the electrophile (electron acceptor). Addition of Cl+ across the multiple bond results in the formation of a carbocation. Subsequent reaction (before or after a rearrangement to the most stable carbocation possible) with OH- results in the formation of chlorohydrin. In case of HO-Cl reaction of ethyne, the initial addition of Cl+ results in a chlorenium ion, where the carbons as sp2 hybridized (planar) and an orthogonal empty p-orbital REPRESENTS the positively charged carbocation. Also, there will TWO sequential addition reactions of HO-Cl. The resulting GEMINAL (on the same carbon) DIOL will eliminate H2O and form the corresponding ALDEHYDE, as indicated below: CH=_CH + HO-Cl —-> CH(Cl)=CH-OH CH(Cl)=CH-OH + HO-Cl —-> CH(Cl)2-CH(OH)2 (gem diol) CHCl2-CH(OH)2 —-> H2O + CHCl2-CH=O (aldehyde) 4.2K viewsView upvotes · Answer requested by Debojjal Bagchi | |