Acetic Anhydride Reaction Lab Report
Acetylation Lab Summary Two versions of the same experiment were performed to assess the difference in reactivity of certain amines with acetic anhydride. Throughout both experiments, observations were made about the reaction progress. The starting materials and products were characterized using thin layer chromatography (TLC), infrared spectroscopy (IR), and melting point. During the first week, I dissolved 0.512g of aniline in 8.5mL of water, and added 5.5mL of 1M HLC. During this step, I observed that there were bubbles in the solution, especially at the bottom of the beaker. After adding the HLC, there solution had a slight yellow tint. Next, I mixed 0.529g of sodium acetate in 3mL of water and added 0.679g of acetic anhydride to the aniline solution and immediately added sodium acetate. The solution was cooled in an ice bath for fifteen minutes. During this time, I noticed the formation …show more content…
Since my unknown had the presence of a halogen, I narrowed down possible starting materials. I combined all of the characterization data from week 2 and was able to identify my unknown starting material as para-bromoaniline and my product as 4-bromoacetanilide. The melting point for para-bromoaniline is typically 66°C and 168°C for 4-bromoacetanilide. Both of these numbers match with the melting point ranges I obtained. This data, combined with the TLC evidence that my unknowns were more polar, allowed me to reach this conclusion. Additionally, I compared IR spectra I obtained to official IR spectra for para-bromoaniline and 4-bromoacetanilide and they had the same important peaks. Between the two weeks, the reaction time was not very different and was about 15 minutes. The combination of data from TLC, IR, and melting point were able to help me asses the identity of my unknown product, and this the importance of characterization in
Triphenylmethyl Bromide Lab Report
920 Words | 4 PagesThe melting point of the product was observed to be 139.5 °C. The theoretical yield of the product is 152 °C (University of South Carolina Department of Chemistry and Biochemistry). The melting point percent difference was calculated by subtracting the theoretical melting point from the actual melting point, dividing the result by the theoretical melting point, and multiplying the result by 100%. The melting point difference was 8.22%. Example calculations are shown
Experiment Of A Wittig Reaction
1167 Words | 5 PagesUsing method 2, the product appear as white crystals. Given that the yellow color remain throughout the product in method 2, too much aldehyde was added. It was predicted that this was the source of error because aldehyde was a yellow liquid. In this experiment, 293 mg of aldehyde was weighted for method 1 instead of 250 mg and.
Bromohexane Lab Report
1111 Words | 5 PagesIn this test, primary halides precipitate the fastest while secondary halides need to be heated in order for a reaction to occur. Comparison of the rates of precipitation of the obtained product to standard 1° and 2° bromide solutions will show whether the product is a primary or secondary
Unknown Compound Verification Lab Report
1767 Words | 8 PagesUnknown compounds verification Introduction: In Project 3 we are going to test an unknown compound and there are several different ways that can help us to identify the Unknown substance. And there is some pre-lab information that found in the internet. By Experiment 3: Identification of a Substance by Physical Properties “Every substance has a unique set of properties that allow us to differentiate one from another. These properties can be classified as either physical properties or chemical properties.
Dichloromethane Lab Report
653 Words | 3 PagesAt the fingerprint region, there was an intense peak at 734. 51 cm-1, which could be the C-CL stretch found in dichloromethane, which means the product might not have been pure. This lab was successful to an extent because we were able to obtain the product, 2-naphthyl ether, but it was not pure since the IR spectrum showed traces of dichloromethane. Also the percent yield of the product was over 100%. Some sources of error in this experiment were that since the product in vial 3 had solidified, we had added a drop of dichloromethane to the vial, resulting in the C-Cl peak of the IR spectrum.
Thin Layer Chromatography Lab Report
676 Words | 3 PagesWe were able to conclude that the crystals obtained from the K2HPO4 were aspirin since they both yielded a Rf value of 0.711. We also concluded the KOH crystals were acetaminophen with a shared Rf value of 0.504. Finally, we used TLC to determine the ether crystals were caffeine, yielding a shared Rf value of 0.209. We utilized how the three active components had varying Rf values due to the polarity of the compounds, with the lower Rf values corresponding to more polar molecules, in order to confirm the identity of our
Electrophilic Aromatic Substitution Reaction Lab Report
821 Words | 4 PagesThe purpose of this experiment was to learn about the electrophilic aromatic substitution reactions that take place on benzene, and how the presence of substituents in the ring affect the orientation of the incoming electrophile. Using acetanilide, as the starting material, glacial acetic acid, sulfuric acid, and nitric acid were mixed and stirred to produce p-nitroacetanilide. In a 125 mL Erlenmeyer flask, 3.305 g of acetanilide were allowed to mix with 5.0 mL of glacial acetic acid. This mixture was warmed in a hot plate with constantly stirring at a lukewarm temperature so as to avoid excess heating. If this happens, the mixture boils and it would be necessary to start the experiment all over again.
Rf Value Lab Report
391 Words | 2 PagesTo confirm the results for the known drugs, we can find the literature value of the Rf. For the unknown powder, we could repeat the TLC with both the unknown and predicted compounds on the same TLC plate to see if the Rf values match. To confirm the results of both the known and unknown we can also put the samples in a mass spectrometry. A lot of safety precautions were taken into consideration whilst doing the experiment.
Acetylsalicylic Acid Synthesis Lab Report
704 Words | 3 PagesLab Report 5: Acetylsalicylic Acid (Aspirin) Synthesis Name: Divya Mehta Student #: 139006548 Date Conducted: November 19th 2014 Date Submitted: November 26th 2014 Partner’s Name: Kirsten Matthews Lab Section: Wednesday 2:30 L9 IAs Name: Brittany Doerr Procedure: For the procedure, see lab manual (CH110 Lab Manual, Fall 2014) pages 96-98. Wilfrid Laurier University Chemistry Department. Fall 2014. Acetylsalicylic Acid (Aspirin) Synthesis.
O-Vanillin Lab Report
840 Words | 4 PagesGlacial acetic acid and acetic anhydride were added to the mixture while refluxing, which converted the lime colored solution into a clear mixture. The flask was cooled in an ice bath and the solution
Diels Alder Reaction
400 Words | 2 PagesThe Hydrolysis reaction included an acidic environment and an acidic catalyst to make the reaction occur faster and initiate the reaction as well. The acidic environment is required in order to add the hydrogen and oxygen onto the carbonyl groups in the final product. Dicarboxylic acid is not very soluble in water/acetone which ultimately resulted in larger yield of product. 2.
Pka Of Bromothymol Blue Lab Report
1221 Words | 5 PagesSpectroscopic Determination of the pKa of Bromothymol Blue Andrea Myer May 27, 2023 Kevin Huang, CHEM 241L, Section 402 I pledge that I have not used someone else’s old or current lab when writing this lab report. I pledge that I did not collaborate with any other students, except where allowed, and that the report I submitted here contains my own ideas, thoughts, observations, calculations, data, conclusions, and answers. Lastly, I pledge that the data represented in this report was my own collected during lab or provided to me by my TA.
Nucleophilic Substitution Reactions Lab
1039 Words | 5 PagesThe possible explanations and changes to make are similar to the previous questions. Conclusion and Future Experiment 18. The identity of the product and unknown were 4-tert-butylbenzyl phenol ether and tert-butyl phenol respectively. The key to making this discovery was the melting point and TLC results!
Synthesis Of Bromination Of Stilbene Dibromide
233 Words | 1 PagesBromination is the process where an alkene is halogenated with bromine. The purpose of this experiment was bromination of stilbene to stilbene dibromide. The element bromine is toxic and requires maximum care when used. Bromine was generated in the reaction mixture by using a green method. Less hazardous reagents were used to do so.
Wittig Reaction Lab Report
1125 Words | 5 PagesThis was proved by utilizing the IR spectrum to verify the C =O was not in the final product as it lacked the 1640 cm-1 peak. The melting point of 113-115 degrees C proved that the final product obtained was the E-Stilbene. The TLC plate proved that the E and the Z product was produced, show cased by the double intensity of the DCM spot to the final product’s spot, both which had an Rf of 0.92. The double intensity proved that both products were produced, but through heating and filtering, the Z-Stilbene was
More about Acetic Anhydride Reaction Lab Report
Triphenylmethyl Bromide Lab Report
920 Words | 4 PagesExperiment Of A Wittig Reaction
1167 Words | 5 PagesBromohexane Lab Report
1111 Words | 5 PagesUnknown Compound Verification Lab Report
1767 Words | 8 PagesDichloromethane Lab Report
653 Words | 3 PagesThin Layer Chromatography Lab Report
676 Words | 3 PagesElectrophilic Aromatic Substitution Reaction Lab Report
821 Words | 4 PagesRf Value Lab Report
391 Words | 2 PagesAcetylsalicylic Acid Synthesis Lab Report
704 Words | 3 PagesO-Vanillin Lab Report
840 Words | 4 PagesDiels Alder Reaction
400 Words | 2 PagesPka Of Bromothymol Blue Lab Report
1221 Words | 5 PagesNucleophilic Substitution Reactions Lab
1039 Words | 5 PagesSynthesis Of Bromination Of Stilbene Dibromide
233 Words | 1 PagesWittig Reaction Lab Report
1125 Words | 5 Pages