Question
Give the various methods used for the preparation of arenes.
Solution
(i) From acetylene: By passing vapours of acetylene through the red-hot iron tube.
(ii) From chlorobenzene: By reducing chlorobenzene with Ni-Al alloy/NaOH.
(iii) From sodium benzoate: By heating sodium benzoate with soda lime (Laboratory method).
(iv) From phenol: By distilling phenol with zinc dust.
(v) From benzene sulphonic acid: By heating benzene sulphonic acid with super heated steam.
(vi) From benzene diazonium chloride: By treating benzene diazonium chloride with hypophosphorous acid (H3PO2) in the presence of Cu+ ions.
(vii) By Wurtz-Fittig reaction: By treating halorene and haloalkane with sodium metal in the presence of dry ether.
(ii) From chlorobenzene: By reducing chlorobenzene with Ni-Al alloy/NaOH.
(iii) From sodium benzoate: By heating sodium benzoate with soda lime (Laboratory method).
(iv) From phenol: By distilling phenol with zinc dust.
(v) From benzene sulphonic acid: By heating benzene sulphonic acid with super heated steam.
(vi) From benzene diazonium chloride: By treating benzene diazonium chloride with hypophosphorous acid (H3PO2) in the presence of Cu+ ions.
(vii) By Wurtz-Fittig reaction: By treating halorene and haloalkane with sodium metal in the presence of dry ether.
