1.

Amongst the following compounds, the one that will not respond to Cannizzaro reaction upon treatment with alkali is

Answer»

`Cl_(3)C CHO`
`Me_(3)C CHO`
`C_(6)H_(5)CHO`
`HCHO`

Solution :Although `Cl_(3)C-CHO` does not contain an ALPHA hydrogen yet it does not undergo cannizzaro REACTION. Instead under basic conditions.

Due to strong -I-effect of the `Cl_(3)C` group, it undergoes nucleophilic attach by `OH^(-)` followed by elimination of `Cl_(3)C^(-)` group. PROTON exchange between `Cl_(3)C^(-)` and HCOOH finally gives `CHCl_(3)`. and `HCOO^(-)`.


Discussion

No Comment Found