1.

Ester having alpha-hydrogen on treatement with a strong base eg. C_(2)H_(5)Ona undergoes self condensation to produce beta-keto esters. This is called claisen condensation EtO-overset(O)overset(||)(C)-OEt+Ph-CH_(2)-overset(O)overset(||)(C)-OC_(2)H_(5) overset((1)C_(2)H_(5)ONa)underset((2)H_(2)O,Delta)to products is

Answer»

`CH_(3)-underset(PH)underset(|)(C)H-COOH`
`{:(""CH_(3)),("|"),(""Ph-C-COOH),("|"),(""COOH):}`
`Ph-overset(O)overset(||)(C)-OEt`
`Ph-CH_(2)-COOH`

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