c. Carbonyl Compounds Three carbonyl compounds were analyzed by various qualitative tests and the summary of their reactions is given in Table 3 below. Identify each unknown sample by matching the respective reaction profile with the given structures (A, B, or C). Table 3. Summary of Reactions of Carbonyl Compounds Sample 2,4 DNP test Red orange precipitates Red-orange precipitates Red orange precipitates Tollen's test No reaction lodoform test Yellow precipitates No reaction 2 No reaction Silver mirror No reaction H3C, CH3 A в Sample Identity and Rationalization 1 | Gives positive 2,4 DNP tests and lodoform Test. Thus it is a methyl ketone. A | 2,4, DNP- This is basically known as Brady's reagent. 2,4 dinitrophenylhydrazine is its full name. The 2,4,DNP test is done by dissolving 50mg of organic sample in 2ml of ethanol Butan-2-on and adding 2,4,DNP to it. 3 drops of the alcoholic solution of the sample are added to 3ml of water and 10 drops of K12 is added. Then 10% NaOH solution is added a few drops. This test helps identify methyl ketone. It gives a yellow precipitate with methyl ketone. 2 This test confirms that there is a carbonyl atom regardless of aldehyde or ketone. THese give red-orange precipitate with all kinds of carbonyl compounds. Gives a positive 2,4 DNP test only. Thus it contains all ketone groups. | 2-cyclohex anedione | Gives a positive 2,4 DNP test and positive Tollens Test. Thus it contains an aldehyd - group. в This test confirms that there is a carbonyl atom regardless of aldehyde or ketone. THese Propen-1,3 give red-orange precipitate with all kinds of carbonyl compounds. -dione This test helps identifty aldehydes. This gives a silver mirror with aldehydes.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Please help me answer the rationalization. don't mind what's in the rationalization, thank you

Transcribed Image Text:c. Carbonyl Compounds Three carbonyl compounds were analyzed by various qualitative tests and the summary of their reactions is given in Table 3 below. Identify each unknown sample by matching the respective reaction profile with the given structures (A, B, or C). Table 3. Summary of Reactions of Carbonyl Compounds 2.4 DNP test Red orange precipitates Red-orange precipitates Red orange precipitates Tollen's test No reaction lodoform test Yellow precipitates No reaction Sample 1 No reaction Silver mirror No reaction H3C CH3 A Sample Identity and Rationalization 1 Gives positive 2,4 DNP tests and lodoform Test. Thus it is a methyl ketone. A 2,4, DNP- This is basically known as Brady's reagent. 2,4 dinitrophenylhydrazine is its full name. The 2,4,DNP test is done by dissolving 50mg of organic sample in 2ml of ethanol and adding 2,4,DNP to it. Butan-2-on e 3 drops of the alcoholic solution of the sample are added to 3ml of water and 10 drops of KI12 is added. Then 10% NaOH solution is added a few drops. This test helps identify methyl ketone. It gives a yellow precipitate with methyl ketone. This test confirms that there is a carbonyl atom regardless of aldehyde or ketone. THese give red-orange precipitate with all kinds of carbonyl compounds. C Gives a positive 2,4 DNP test only. Thus it contains all ketone groups. 2-cyclohex anedione 3 Gives a positive 2,4 DNP test and positive Tollens Test. Thus it contains an aldehyd group. B This test confirms that there is a carbonyl atom regardless of aldehyde or ketone. THese Propen-1,3 give red-orange precipitate with all kinds of carbonyl compounds. -dione This test helps identify aldehydes. This gives a silver mirror with aldehydes.

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