Which one of the following compound will be least responsive to electron capture detector (ECD)? DDT (a chlorinated pesticide) trichloroethylene (TCE) chlordane methyl benzene (toluene)
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- 2. For the reaction performed in this experiment, the IR spectra for the reactants and product are shown below. For the IR spectra of acetone and the product, identify the important IR signals for each spectrum. Specifically: - for the IR spectrum of acetone, identify the signal which indicates the presence of the C=O bond and the signal which represents the CH bond (indicate the hybridization of the carbon). -for the IR spectrum of the product indicate which signal represents the CH bond (hybridization?) and which signal represents the O-H bond. You may write the answers on the spectra if you wish. Reactant: 1-bromobutane % Trasm ittaice 100 % Transmittance 20 GO 40 20 0 4000 Reactant: acetone 100 DO GO 40 20 3600 4000 3500 3000 IAN 3000 2500 M wavenumber (cm) 2500 2000 n 2000 Wavenumber (cm³¹) 1500 VI 1500 1000 1000explain IR data and any information discern from it. This IR is Benzophenone IR2) For each of the following pairs of compounds, name one absorption band that can be used to distinguish between them. State what the bond is (bond order, between which 2 atoms), and approximately where it appears in the IR spectrum (in cm ¹). b) HO 1-hexanol OH phenol H₂N 1-butanamine ethyl acetate cyclohexane OH hexanoic acid LOH cyclohexanol NH₂ butanamide diethyl ether cyclohexene
- What is the expected IR absorptions you would expect to see from the following molecule? OH If you were to take the IR of the starting molecule and then the product after the reaction is complete which IR absorption peaks will disappear and which will appear? Give absorption number and what part of the molecule that absorption references. H3O*Based on the data below, what is the reactivity order of the following compounds? Explain your reasoning in detail. Chlorobenzene Total: 327mg Ortho: 162mg / Para: 165mg Bromobenzene Total: 508mg Ortho: 128mg / Para: 380mg Iodobenzene Total: 664mg Ortho: 20mg / Para: 664mgWhich of the following molecules do you expect would be useful in quenching benzophenone photoreduction? Explain.Oxygen (S1 = 22 kcal/mol)9,10-Diphenylanthracene (T1 = 42 kcal/mol)trans-1,3-Pentadiene (T1 = 59 kcal/mol)Naphthalene (T1 = 61 kcal/mol)Biphenyl (T1 = 66 kcal/mol)Toluene (T1 = 83 kcal/mol)Benzene (T1 = 84 kcal/mol)
- ii) How are the spectroscopic techniques useful in the structural elucidation of following organic moleculesIn the box provided, write the IR frequency or range of frequencies that would best distinguish between the two compounds shown. Specify which compound (A or B) will display a band at this frequency in its IR spectrum. Bond O-H (alcohol) O-H (carboxylic acid) N-H C-H (alkane) C-H (alkene) C-H (alkyne) C=C 2100-2250 C=C 1600-1680 C=O (aldehyde/ketone) 1630-1820 C=O (ester) 1735-1800 C=O (carboxylic acid) 1700-1725 C-O 1000-1250 A Stretching frequency (cm-¹) 3200-3650 2500-3300 3100-3550 2850-3000 3000-3100 OH 3300 لم B Intensity Medium, broad Strong, broad Medium Medium Medium to strong Weak to medium Weak Weak to medium Strong Strong Strong Strong (Choose the most prominent frequency. Do not include units in your answer. Use only the frequencies listed above. If there is more than one correct answer, only give one.) Write the letter of the compound, followed by the range of frequencies, separated by a comma. Example. "A,1600-1850". IR frequency or range of frequencies: cm-1 Previous…Assume that you are in a laboratory carrying out the catalytic hydrogenation of cyclohexene to cyclohexane. How could you use a mass spectrometer to determine when the reaction is finished?
- An oxygen-containing compound shows an absorption band at 1700 cm', and no absorption at 3300 cm', 2700 cm', or 1100 cm1. Which class of compounds is suggested in the given information? A. Carboxylic Acid B. Ester C. Ketone D. Aldehyde E. AlcoholWhen 1-bromobutane is treated with sodium acetate(CH3CO2Na), the major product for the reaction is an ester (CH3CO2CH2CH2CH2CH3). Explain how mass spectrometry and IR spectroscopy could be used to prove that the reaction has occurred and you no longer have the starting material.Consider the product below a) Would this product show a signal in a UV-Vis spectrum? Why? b) Would this molecule have a non-zero alpha-value in polarimetry? Why? c) What stretches would be expected in an IR spectrum of this molecule? d) Predict the 1H NMR spectrum for this molecule. For H1 to H6 e) Predict the 13C NMR spectrum and DEPT spectra for Carbon A- Carbon G. Use (+) for positive signals, (-) for negative signals, and (X) for no signal in the DEPT NMR spectra. f) If a base such as NaOH was used, it would be harder to determine the major product before running the reaction. Once the reaction was run, how would you determine the product favored using spectroscopy?