To prepare phenyl benzoate from phenol and benzoyl chloride by Schotten Baumann reaction.
250 ml conical flask,beaker,volumetric flask, measuring cylinder,suction pump,buchner funnel,filter paper etc.
Phenylet, Benzyl chloride,NaOH,alcohol etc.
Theory and principle:-
Phenol react with an aromatic acid chloride in the presence of excess NaOH reaction at room temperature to form an ester is called as Schotten Bauman reaction.
If Phenol is shaken with benzoyl Chloride and excess amount of sodium hydroxide solution it is benzolyted to give the ester, phenyl benzoate. The phenol is converted into ionic compound sodium phenoxide by dissolving it sodium hydroxide solution.
General reaction :-
Mechanism for this reaction:-
1- In a 100ml conical flask dissolve 2.5 gram of phenol in 35 ml of 10% sodium hydroxide solution and add 5 ml benzoyl chloride.
2- Cork the flask properly and Shake
the mixture until the smell of benzoyl chloride disappeared.
3- The phenyl benzoate which separate is filtered off washed with cold water dried and recrystallized from alcohol.
1- Always wear gloves while handling chemicals.
2- Wear goggles to protect Eyes
3- Benzoyl chloride should be handled with care under a fumehood.
4- Phenol is not only toxic but will cause serve burns
5- Use freshly prepared solution of NaOH.
1- Yield of crystals =
2- Colour of Crystal = colorless
3- Observed melting point of crystals =
4- Literature melting point of compound =