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Complete the following reactions: a.2Me_(3)C--Br overset (Ag_(2)CO_(3)) underset (Delta) rarr (A) b.MeOH + MeCH=O + HCI (g) rarr (B) c.MeOH + H_(2)C=O + HCI (g) rarr (C) d. |
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Answer» Solution :a.`A = Me_(3)C--O--Me_(3)` (Di-t-butyl ether) `AG^(o+)` reacts with `Br^(o+)` leaving `Me_(3)C^(o+)` which reacts with `CO_(3)^(2-)` to give `Me_(3)C--OCO_(2)^(-)`. The latter loses `CO_(2)` leaving `Me_(3)CO^(-)` which reacts with `Me_(3)C^(o+)` to give the product. DUE to steric hindrance, the yield is less. MECHANISM :  b.  c.  d.It is an example of Friedel-Crafts type addition to a double bond.  e.It is an example of organometallic coupling reaction. |
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