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Give the example of preparation of alkane from the alkyl halide ? |
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Answer» Solution :Alkyl halides (except fluorides) on reduction with zinc and dilute hydrochloric acid give alkanes. <BR> `R-X+H_(2)overset(Zn+H^(+)("for HCl"))rarr R-H+HCl` Example of REACTION : (i) `underset("Chloromethane")(H_(3)C)-Cl+H_(2)overset(Zn+H^(+))rarr underset("Methane")(CH_(4))+HCl` (ii) `underset("Chloromethane")(CH_(3)CH_(2))-Cl-H_(2)overset(Zn+H^(+))rarr underset("Ethane")(C_(2)H_(6))+HCl` (iii) `underset("1-Chloropropane")(CH_(3)CH_(2)CH_(2)Cl)+H_(2) overset(Zn +H^(+))rarr underset("PROPANE")(CH_(3)CH_(2)CH_(3))+HCl` (iv) `CH_(3)CH_(2)Br +H_(2) overset(Zn+H^(+))rarr CH_(3)-CH_(3)+HBr` (v) `underset("2-Bromopropane")(CH_(3)underset(Br)underset(|)(CH))CH_(2)CH_(3)+H_(2)overset(Zn+H^(+))rarr CH_(3)CH_(2)CH_(2)CH_(3) + HBr` |
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