Laboratory #6 Qualitative Tests for Carbonyls: Aldehydes vs. Ketones Introduction Various chemical tests identifying ketones and aldehydes are used in this experiment in order to identify an unknown carbonyl compound. The tests used are: 2‚4-dinitrophenylhydrazone test‚ Tollen’s Test‚ Benedict’s Test‚ Chromic Acid Test‚ aka Bordwell-Wellman Test‚ Schiff’s Test‚ and Iodoform Test. These classification tests provide results based on color change or formation of precipitation‚ which is then used
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Abstract: The objective of the experiment was to prepare Benzilic acid by multistep synthesis starting with benzaldehyde. In this setup however‚ product of the first step‚ Benzoin‚ is provided thereby omitting the first step involving the conversion of benzaldehyde. For this experiment‚ the microscale techniques of reflux‚ crystallization‚ and melting-point determination were used. Utilizing these techniques a product yield of 93% for benzil and 57% for Benzilic acid was obtained‚ as well as
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Cancer Alternative Treatments The year 2008 was one of the most difficult one of my life emotionally. On March 4th 2008 my Grandpa died of pneumonia. This is the first time in my life that someone close to me had died. I was in 7th grade at the time. I remember how everyone in my family was saddened and in a sense shattered by this event. At first I was in complete shock for the longest time and in disbelief that he passed. We were supposed to celebrate his birthday four days later on March 8th
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Chemistry 3373F Lab Manual 2008 Modified 11/07 Table of Contents Chem 3373 Laboratory Schedule for Fall 2008.............................................................................2 The Benzoin Condensation of Benzaldehyde ..............................................................................3 Synthesis of Dilantin and Related Compounds (two weeks).........................................................6 Synthesis of an Alkaloid: Pseudopelletierine (two weeks) .............
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making ability in carbonyl chemistry‚ Dibenzalacetone is synthesized from 2 equivalent of benzaldehyde and 1 equivalent of acetone in a base catalyzed reaction. Physical Data1: *detailed risk and safety phrases are attached. substance Hazards‚ risks and safety practices MW (g/mol) Amt. Used Mol. mp (K) bp (K) density(g/cm^3) acetone R11‚ R36‚ R67‚ S9‚ S25‚ S26 58.08 0.24 g 0.004 178.2 329.4 0.79 benzaldehyde R22‚ S24 106.13 0.82 g 0.008 247 451.1 1.0415 ehtyl acetate R11‚ R36‚ R66‚ R67‚ S16‚ S26
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CHEM 3125 Experiment 4: Multistep synthesis of tetraphenylcyclopentadienone Overall Synthesis: CHEMICALS: wk 1: thiamine hydrochloride (1 g/student)‚ 95% ethanol (8 mls/ student)‚ 2M NaOH (5 mls/student)‚ benzaldehyde (4 mls/student) wk 2: 95% ethanol (30 mls/student) wk 3: acetic acid (6 mls/student)‚ ammonium nitrate (1 g/student)‚ 0.1g/ml cupric acetate (1.5 mls/student)‚ dichloromethane (6 mls/ student)‚ 30% acetone in heptanes (3 mls/student)‚ 95% ethanol (20 mls/student) wk 4:
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Introduction: This experiment focuses on carrying out a Perkin Reaction to synthesize (E) and (Z) isomers of α-phenylcinnamic acid. This was accomplished by refluxing benzaldehyde‚ phenylacetic acid‚ acetic anhydride and triethylamine as a base. The chemical equation of a Perkin Reaction can be seen below. The reaction mechanism for the synthesis of α-phenylcinnamic acid is shown below: Results: Theoretical Yield Therefore‚ phenylacetic acid is the limiting reagent. Table 1
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the tests performed. Several organic compounds with different functional groups were tested to identify the functional groups present in the compound. n-heptane‚ pentene‚ benzene‚ heptanol‚ sec-butanol‚ phenol‚ acetyl chloride‚ buteraldehyde‚ benzaldehyde‚ 2-butanone‚ propanoic acid‚ sucrose‚ diethyl ether‚ butyl bromide‚ acetonitrile‚ L-alanine‚ n-amyl acetate‚ benzene sulfonyl chloride and aniline were used as test compounds. Observations were noted‚ such as changes in color and product formation
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reactive) a. Toluene‚ Nitrobenzene‚ Anisole‚ Methylbenzoate -Nitrobenzene‚ Methylbenzoate‚ Toluene‚ Anisole b. Benzene‚ acetophenone‚ bromobenzene‚ benzyl alchohol - Acetophenone‚ Bromobenzene‚ Benzene‚ Benzyl alcohol c. Styrene‚ benzaldehyde‚ aniline‚ iodobenzene - Benzaldehyde‚ Iodobenzene‚Styrene‚ Aniline 4.) Effect of solvent in reaction of acetanilide and Br2 (in Part B) The acetic acid served as the Lewis acid in the reaction. By definition‚ Lewis acid is an electron pair acceptor. With the presence
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Chalcones were synthesized according to the previously described methodology (26). A substituted acetophenone (5 mmol) and benzaldehyde (5 mmol) were dissolved in dry methanol (30 ml) and catalytic amount of sodium hydroxide was added to the above solution. The reaction mixture was stirred for 30 min and then neutralized with 1 N HCl. The products were purified by recrystallization from ethyl alcohol and water. The synthetic procedure and reaction conditions for chalcones are illustrated in scheme
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