Give two reactions of electrophilic addition on acetylene along with their mechanism.
Starting from acetylene how will you obtain:
(i) Ethylidene iodide
(ii) Dichloro acetaldehyde
(iii) Ethylene?
Starting from Ethyne, how will you prepare (No mechanism):
(i) Ethanol (ii) Vinyl chloride (iii) Methyl vinyl ether (iv) Vinyl acetate?
(i) Ethanol: It is obtained by the following steps of reaction:
(ii) Vinyl chloride: Ethyne reacts with one mole of HCl to form vinyl chloride.
(iii) Methyl vinyl ether: When ethyne is passed into methyl alcohol at 433-473 K in the presence of small amount of potassium methoxide and under pressure, methyl vinyl ether is formed.
(iv) Vinyl acetate: Acetic acid adds on a molecule of ethyne in the presence of mercury salt to form vinyl acetate.