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BACKGROUND
Principle: Aromatic aldehyde condense with aliphatic or mixed aryl alkyl ketone in presence of aqueous alkali to form α, β-unsaturated ketone, which is well known as Claisen-Schmidt condensation. Acetophenone and benzaldehyde react and form benzylideneacetophenone (chalcone) in presence of ethanol and NaOH. Here the C-C bond forming step in aldol condensations is facilitated by electron withdrawing group and retarded by electron releasing group on the carbonyl component of ketone.1
Aim: To prepare chalcone (1, 3-diphenylprop-2-en-1- one) from bendzaldehyde and acetophenone.
Reaction:
Mechanism:
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REQUIREMENTS
Chemicals: Bendzaldehyde
Acetophenone
NaOH
Rectified spirit
Apparatus: Conical flask
Round bottom flask
Condenser
Beaker
Pipette
Glass rod
Buchner funnel
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PROCEDURE
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CONCLUSION
Chalcone was synthesized and the percentage yield was found to be………..%
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REFERENCES
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Vogel’s Textbook of Practical Organic Chemistry by Brian S. Furniss, Antony J. Hannaford, Peter W. G. Smith & Austin R. Tatchell; Fifth Edition; Page No.- 1034
- Practical in organic chemistry, by Hitesh G. Raval, Sunil L. Baldania and Dimal A. Shah, Nirav Prakashan, Page No. 267.
