When we were doing the GC analysis of our product from dehydrobromination of 2- bromobutane, we commonly saw a large peak at the very beginning of the GC spectrum What is the peak? It's some byproduct from SN2 reaction It's air in our product mixture It's some residue from last run of GC It's the noise of GC instrument

When we were doing the GC analysis of our product from dehydrobromination of 2- bromobutane, we commonly saw a large peak at the very beginning of the GC spectrum What is the peak? It's some byproduct from SN2 reaction It's air in our product mixture It's some residue from last run of GC It's the noise of GC instrument

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 16CTQ

See similar textbooks

Similar questions

How would you interpret this IR spectra of fluorene? What I mean by this is which peaks let you know its fluorene and which peaks show impurities if any such as 9-fluorenone since this lab required a separation of fluorene and 9-fluorenone. Other impurities could be solid alumina and sand and the solvents of pet. ether and dichlormethane.
9) What would be the difference between the 4 alcohols in IR? They all show O-H, C-H sp3, and C-H aromatic bonds. The only way to tell which one is used would be by comparing the fingerprint regions to published IR spectra of each alcohol. Alcohol 2 has an aldehyde C-H group that could be seen between 2700-2800 and 2800-2900 cm-1 Only alcohol 3 will show O-H bond around 3300 cm-1 Only alcohol 1 will show C=C aromatic bonds around 1600 cm-1 10) Assuming 5.0 mL of alcohol 2 was used and 2.2 g of the product was isolated, what is the percent yield for this reaction? The product has a molar mass of 198.00 g/mol. 11) How could the percent yield be increased for this reaction? Add NaOH to neutralize the product as it forms Add a catalyst such as H2SO4 to help speed up the reaction Add a catalyst such as HCl to help speed up the reaction Cool the reaction on ice to increase the rate of reaction 12) Is there another way that the product of this reaction…
If the analysis by IR spectroscopy showed that 4-t-butylcyclohexene contains 4-t-butylcyclohexanol, what quantitative separation technique would you use to get to pure cycloalkene. EXPLAIN ALL DETAILS OF THE PROCESS TO FOLLOW until the pure product is weighed.
Infrared Interpretation – interpret all absorptions in the 4000-1400 cm-1 region of the IR spectra of 2-methyl-4-heptanone. Label the recorded IR spectra and provide an indication of the impurities present, if any.
Fully explain what the data in IR and GC-MS spectra mean in the dehydration of 2-Methylcyclohexanol . GC-MS data (gas chromatography): Illustrated in picture *ignore peak at 8.87 minutes Peak 1 mass = 96.2 (1-methylcyclohexene) Peak 2 mass = 96.2 (3-methylcyclohexene) Peak 3 mass = 114.2 (impurity) IR Spectra (Infrared Spectroscopy): Illustrated in picture.
1. Which compound will have the largest Rf value on a TLC plate using 10% ethyl acetate/hexane as a developing solvent: 3- decanone or 3- decanol, toluene or benzoic acid, cyclohexane or cyclooctanone? Explain why?
In the expanded region of 1H NMR for 4-t-butylcyclohexanols, the peak at 4.05 ppm integrates to 1.0 while the peak at 3.52 ppm integrates to 2.52. Please use this information to calculate the percentage of each isomer in the sample. QUESTION- Based on the 1H NMR, Please explain the cis vs. trans product ratio. Is it consistent with the expected results? Why or why not?
How can you use TLC to determine if a chemical reaction has gone to completion? For example, treatment of cyclohexanol in the presence of a non-nucleoplhilc acid, sulfuric acid gives the corresponding alkene, cyclohexene via an E1 reaction. Draw 3 examples of TLC plates: a) at the beginning of the reaction, b) during the reaction, and c) at the completion of the reaction. Explain what is shown on each plate. Hint: What are the dominant intermolecular interactions of cyclohexanol and cyclohexene?
What unknown alcohol it was used based on the IR and boiling range of 123*C-129*C
Each of the solvents given should effectively separate one of the following mixtures by TLC. Match the appropriate solvent with the mixture that you would expect to separate well with that solvent. Select your solvent from the following: hexane, methylene chloride, or acetone. You may need to look up the structures of solvents and compounds in a handbook.a. 2-Phenylethanol and acetophenoneb. Bromobenzene and p-xylenec. Benzoic acid, 2,4-dinitrobenzoic acid, and 2,4,6-trinitrobenzoic acid
The oxidation of 3-pentanol to 3-pentanone was performed in the lab and an IR was taken of the finished product. (a) what are the key functional groups in the starting material, 3-pentaol? (b) what are the key functional groups in the product, 3-pentanone? (c) based on the IR spectrum below, was the experiment successful, and, if so, how pure was the product? Explain your reasoning.
How can We use GC analysis to confirm the identity of the product?