The recorded melting point was 84°C, which is close to cis, trans (Z,E) dibenzalacetone with melting point of 60°C. The purpose of this experiment was to carry out an aldol condensation to produce dibenzalacetone and determine which of the three possible isomers of dibenzalacetone (cis,cis, cis,trans, and trans,trans) is the major product. (1) Write the mechanism of the base-catalyzed aldol condensation of acetone and a generalized aromatic aldehyde, Ar–CH=O to give the α,β-unsaturated product (i.e. M. Jones: Condensation Reactions, Aldol reaction, Chapter 17, Section 3, pgs 840-850. The products are a series of analogs called benzalacetophenones, or chalcones. ... Synthesis of 4-methoxychalcone utilized an Aldol condensation mechanism. The crude product This procedure has been adapted from the microscale procedure described in the third edition of Macroscale and Microscale Organic Experiments by Kenneth L. Williamson (Houghton Mifflin, Boston, 1999). 9. The product was then . Experiment 19 — Aldol Condensation _____ Pre-lab preparation. In this experiment, a benzaldehyde derivative will be used as the carbonyl compound that contains no \(\alpha\)-protons, and acetophenone will act as the carbonyl compound containing \(\alpha\)-protons. Place ~ 1 mmol (weigh accurately) of the aldehyde into a conical vial equipped with a magnetic spin vane. Experiment 6 - Aldol Condensation Objective To provide experience with Aldol condensation, a useful reaction to prepare conjugated carbonyl systems. CHEM 322L Experiment 9: Aldol Reaction 1 . Back to top; 13: Exp. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Add one mole equivalent amount of the ketone and 1 mL of 95 % ethanol to the vial and start stirring. The reaction was monitored by TLC for one hour, and it was stopped at a little over half completion. 9: The Aldol Condensation. Introduction Hydrogen atoms that are located on a carbon adjacent (alpha) to a carbonyl group are acidic and can be removed by base. Start studying Experiment 11B: The Aldol Condensation. Aldol Condensation Of Acetophenone With Anisaldehyde NaOH Cha, EtOH H MW = 136.15 G/mol MW= 120.15 G/mol MW=238.28 G/mol Trans-p-anisalacetophenone Procedure Into A 25 Or 50 ML Erlenmeyer Flask Are Placed 10 Mmole Of Acetophenone, 10 Mmole Of Anisaldehyde, 5 ML Of 95% Ethanol, And 8 ML Of 10% Sodium Hydroxide Solution. This procedure has been adapted from the microscale procedure described in the third edition of Macroscale and Microscale Organic Experiments by Kenneth L. Williamson (Houghton Mifflin, Boston, 1999). CHEM 322L Experiment 9: Aldol Reaction 1 9. Students worked individually on this experiment … Learn vocabulary, terms, and more with flashcards, games, and other study tools. Aldol Reaction . CHEM 322: Crossed Aldol Condensation: Synthesis of Dibenzalacetone (1,5-Diphenyl-1,4-pentadien-3-one) Introduction: In this experiment, you will perform a type of base-catalyzed crossed aldol condensation called the Claisen-Schmidt reaction. Start studying Exp. General Aldol Condensation Procedure. The aldol reaction is … the reaction at the top of the … Question: Experiment 9. The purpose of this experiment was to synthesize and purify 4-methoxychalcone via an Aldol condensation mechanism. Aldol Reaction M. Jones: Condensation Reactions, Aldol reaction, Chapter 17, Section 3, pgs 840-850. CHEM 238 - 504 11.8.18 Experiment 9: The Aldol Condensation The objectives for this experiment were to use aldol condensation reactions to synthesis a colored cyclopenta-dienone, to use UV/VIS spectrophotometry to characterize the dienone, and finally to use computer visualization to better understand its unusual three-dimensional structure. 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