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- 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.A pleasant-smelling liquid having a boiling point of 101oC was subjected to IR Spectroscopy to determine the functional groups present and partially determine its nomenclature based on the molecular formula given. What are the functional groups present based on the major infrared absorptions? (Select Possible Answers)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…
- 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?Assign the IR spectra given in Questions 1 - 3 to their corresponding structures from the ones below. The number in parentheses next to each possible answer corresponds to the structure's Chemical Abstracts Services (CAS) number. 1-bromobutane (109-65-9) 1-cyclopropylethan-1-one (765-43-5) 1-ethyl-3-methylbenzene (620-14-4) 1,2-dimethoxynenzene (91-16-7) 2,3-dimethylbutan-2-ol (594-60-5) 3-methylbutan-1-ol (123-51-3) 3,3-dimethylbutan-2-one (75-97-8) 4-benzylpiperidine (31252-42-3) 4-methoxybenzaldehyde (123-11-5) acetic anhydride (108-24-7) acetonitrile (75-05-8) acetyl chloride (75-36-5) anisole (100-66-3) benzaldehyde (100-52-7) benzoic acid (65-85-0) benzophenone (119-61-9) benzyl acetate (140-11-4) bromobenzene (108-86-1) cyclohex-2-en-1-one (930-68-7) cyclohexanone (108-94-1) cyclopent-2-en-1-one (930-30-3) diethylamine (109-89-7) dimethyl malonate (108-59-8) ethyl 2-cyanoacetate (105-56-6) ethynylbenzene (536-74-3) heptanoic acid…What unknown alcohol it was used based on the IR and boiling range of 123*C-129*C
- Given the IR spectra of cis-4-cyclohexene-1.2-dicarboxylic acid and 2-phenyl-2-propanol , interpret the spectras and account for all necessary peaksi need help in comparing ir spec of 1,4-dimethoxybenzene versues 1,4-dimethoxybenzene and what is present and absent in the the functional groups i made the ir specs belowhow could you tell if an unknown is alcohol by examining its IR spectrum
- 2. A. Match the following IR spectra with their respective molecules butane, 1-butene, and 1- butyne. Explain your answer. B. Assigned the major peaks in spectra (indicate the positions of vibrational modes belonging to the major functional groups in molecules). C. Calculate the number of vibrational modes in butane.which IR stretches and bends indicate what type of functional group we have (alcohol, carboxylic acid, ester), 2. how you can then use IR to monitor the change from the starting materials to the products. 3. indicate and discussion the absorptions that are relevant to alcohol OH and C-O, carboxylic acid OH, carboxylic acid C=O, ester C=O, and C-O). the picture below is an ir spectra of carboxylic acidArrange the following solvents in order of increasing polarity (least polar to most polar): Propyl Amine – Diethyl Ether – Ethyl Acetate- Octane If you ran an unknown sample on a TLC and observed only one spot with a Rf value of 0.95, is it safe to assume that it is a pure compound? If not, how can you check it out using TLC?