C2h5br +alc koh---A+Br/ccl4---B +KCNexcess --C+H3O---D
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Explanation:
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anaymussia1riz
29.12.2016
Chemistry
Secondary School
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Complete the reactionsCH3CH2Br +KOH(aq) -C2H5Br+KOH(acl) -C2H5Br +KNO2-
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kvnmurty
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CH₃ CH₂ Br = Bromoethane or Ethyl Bromide
1) CH₃ CH₂ Br + K OH (aq) ==> CH₃ CH₂ OH + K Br (ionic salt)
Bromoethane Ethyl Alcohol
Nucleophilic substitution.
2) CH₃ CH₂ Br + K OH (Alc) ==> CH₂ = CH₂ (g) + K Br + H₂O
Alcoholic Potash Ethene
Elimination reaction. C₂ H₅O⁻ (Ethanolate) ions are formed due to presence of Alcohol.
3) CH₃ CH₂ Br + K NO₂ (aq) ==> C₂H₅ NO₂ (l) + K Br
C₂H₅ - O - N = O : Ethyl Nitrite, Sweet Nitrite (Spirit, Nitre)
Bond formed with Oxygen.
I am adding another reaction for understanding a little more...This is quite different from above.
4) C₂H₅ Br + Ag NO2 ==> C₂H₅ - N - O₂ + Ag Br
Nucleophilic Substitution reaction
Nitroethane. Bond formed with Nitrogen, as AG-O is covalent.