1.

Name the reagents which are used in the following conversions : (i) A primary alcohol to an aldehyde. (ii) Butan-2-one to butan-2-ol. (iii) Phenol to 2, 4, 6 - tribromophenol.

Answer»

SOLUTION :(i) Reagent is pyridinium chlorochromate (PCC), a COMPLEX of chromium trioxide with PYRIDINE and HCl.
`underset("PRIMARY alcohol")(R-CH_(2)OH) overset(PCC) rarr underset("Aldehyde")(R-CHO)`
(ii) Reagent is `NaBH_(4)`, SODIUM borohydride.
`underset("Butan-2-one")(CH_(3)CH_(2)-overset(O)overset(||)C-CH_(3))overset(NaBH_(4))rarr underset("Butan-2-ol")(CH_(3)CH_(2)overset(OH)overset("|")"CH"CH_(3))`
(iii) Reagent is bromine water.


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